Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY AND STOCK COMPENSATION (Details Textual)

v2.4.1.9
STOCKHOLDERS' EQUITY AND STOCK COMPENSATION (Details Textual) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Nov. 21, 2012
May 31, 2014
Jun. 30, 2014
Dec. 31, 2011
Dec. 31, 2014
Mar. 31, 2013
Jan. 31, 2013
Dec. 31, 2012
Aug. 18, 2009
May 28, 2014
Sep. 04, 2014
Jun. 10, 2014
Mar. 05, 2010
Stockholders' Equity [Line Items]                                
Options outstanding - Shares 1,740,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 1,638,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 1,307,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber       1,333,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 1,740,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber     1,307,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber          
Equity Method Investment Ownership Percentage Required For Rights Exercisable Under Right Agreement 15.00%prph_EquityMethodInvestmentOwnershipPercentageRequiredForRightsExercisableUnderRightAgreement 15.00%prph_EquityMethodInvestmentOwnershipPercentageRequiredForRightsExercisableUnderRightAgreement                            
Available for grant, Shares (in shares) 20,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant 262,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant         20,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant     0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant          
Proceeds from exercise of stock options (In shares) 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 25,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised                          
Vesting period 0 years   3 years                          
Share-Based Compensation Arrangement By Share-Based Payment Award Options Grants In Period Grant Date Fair Value $ 87,000prph_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue $ 237,000prph_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue $ 13,000prph_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue         $ 87,000prph_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue     13,000prph_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options 137,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions             137,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value   12,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue                            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 2 years 3 months 18 days                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value 472,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue             472,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value 16,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue             16,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 456,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1             456,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1                
Common Stock, Shares, Issued 25,125,113us-gaap_CommonStockSharesIssued 21,437,059us-gaap_CommonStockSharesIssued           25,125,113us-gaap_CommonStockSharesIssued                
Proceeds From Issuance Of Common Stock 4,910,000us-gaap_ProceedsFromIssuanceOfCommonStock 444,000us-gaap_ProceedsFromIssuanceOfCommonStock 1,070,000us-gaap_ProceedsFromIssuanceOfCommonStock                          
Share-based Compensation Options Granted Subject To Vesting Date Of Grant Minimum Term 6 years                              
Share-Based Compensation Options Granted Subject To Vesting Date Of Grant Maximum Term 7 years                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price $ 1.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice             $ 1.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Beginning Balance 262,750us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares             262,750us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares                
Class of Warrant or Right, Exercise Price of Warrants or Rights                       $ 45us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1        
General and Administrative Expense, Total 8,143,000us-gaap_GeneralAndAdministrativeExpense 5,893,000us-gaap_GeneralAndAdministrativeExpense 6,127,000us-gaap_GeneralAndAdministrativeExpense                          
Additional Paid In Capital, Common Stock 54,664,000us-gaap_AdditionalPaidInCapitalCommonStock 43,607,000us-gaap_AdditionalPaidInCapitalCommonStock           54,664,000us-gaap_AdditionalPaidInCapitalCommonStock                
Common Stock, Par or Stated Value Per Share $ 0.0005us-gaap_CommonStockParOrStatedValuePerShare $ 0.0005us-gaap_CommonStockParOrStatedValuePerShare           $ 0.0005us-gaap_CommonStockParOrStatedValuePerShare                
Cash Less Exercise Of Right Terms In the event of a cashless exercise of the Right, and the acquirer has acquired less than 50% beneficial ownership of the Company                              
Share Based Compensation Arrangement By Share Based Payment Option Expiration Terms No incentive stock option could be exercisable more than ten years after the date of grant or five years after the date of grant where the individual owns more than ten percent of the total combined voting power of all classes of stock. Stockholders approved the 1997 Plan in Fiscal 1998.                              
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number 200,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value 217,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1                              
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Total 472,000us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 160,000us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 153,000us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue                          
2012 Equity Line of Credit [Member]                                
Stockholders' Equity [Line Items]                                
Maximum Number Of Common Stock Authorized For Issuance Over 36 Months       2,500,000prph_MaximumNumberOfCommonStockAuthorizedForIssuanceOver36Months
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandTwelveEquityLineOfCreditMember 		                       
2014 Equity Line of Credit [Member]                                
Stockholders' Equity [Line Items]                                
Investor Right To Use Excess Proceeds, Maximum Percentage 5.00%prph_InvestorRightToUseExcessProceedsMaximumPercentage
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		                             
Share Purchase Put Restrictions Maximum Percentage Of Ownership Held By Investor To Purchase Shares In Equity Line Of Credit 4.99%prph_SharePurchasePutRestrictionsMaximumPercentageOfOwnershipHeldByInvestorToPurchaseSharesInEquityLineOfCredit
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		                             
Equity Line, Purchase Price Percentage       95.00%prph_EquityLinePurchasePricePercentage
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		                       
Common Stock, Shares, Issued 2,561,520us-gaap_CommonStockSharesIssued
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		            2,561,520us-gaap_CommonStockSharesIssued
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		               
Proceeds From Issuance Of Common Stock 3,700,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		                             
Agreement Term         36 months                      
Purchase Price Value 500,000prph_PurchasePriceValue
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		            500,000prph_PurchasePriceValue
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		               
Common Stock, Capital Shares Reserved for Future Issuance 438,480us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		            438,480us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		        3,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandFourteenEquityLineOfCreditMember 		     
Settlement Agreement [Member]                                
Stockholders' Equity [Line Items]                                
Treasury Stock, Shares, Acquired 3,896,764us-gaap_TreasuryStockSharesAcquired
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		                             
Proceeds from Other Equity 440,000us-gaap_ProceedsFromOtherEquity
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		                             
Loss Contingency Accrual, Payments 500,000us-gaap_LossContingencyAccrualCarryingValuePayments
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		                             
Related Party Costs 37,000us-gaap_RelatedPartyCosts
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		                             
General and Administrative Expense, Total 97,000us-gaap_GeneralAndAdministrativeExpense
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		                             
Common Stock, Shares, Outstanding                           3,896,764us-gaap_CommonStockSharesOutstanding
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		   
Additional Paid In Capital, Common Stock                           5,100,000us-gaap_AdditionalPaidInCapitalCommonStock
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		   
Common Stock, Par or Stated Value Per Share                           $ 1.31us-gaap_CommonStockParOrStatedValuePerShare
/ prph_AgreementTypeAxis
= prph_SettlementAgreementMember 		   
Employee Stock Option [Member]                                
Stockholders' Equity [Line Items]                                
Share-Based Option Vested During Period 1,450,250prph_SharebasedOptionVestedDuringPeriod
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember 		            1,450,250prph_SharebasedOptionVestedDuringPeriod
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember 		               
Share-Based Option Subject To Vesting During Period 262,750prph_SharebasedOptionSubjectToVestingDuringPeriod
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember 		            262,750prph_SharebasedOptionSubjectToVestingDuringPeriod
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember 		               
Minimum [Member]                                
Stockholders' Equity [Line Items]                                
Vesting period   2 years                            
Minimum [Member] | Employee Stock Option [Member]                                
Stockholders' Equity [Line Items]                                
Vesting period 1 year                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 2 years 6 months                              
Maximum [Member]                                
Stockholders' Equity [Line Items]                                
Vesting period   3 years                            
Maximum [Member] | Employee Stock Option [Member]                                
Stockholders' Equity [Line Items]                                
Vesting period 3 years                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 6 years 6 months                              
Chief Executive Officer [Member]                                
Stockholders' Equity [Line Items]                                
Ownership Percentage by Officers           20.00%prph_OwnershipPercentageByOfficers
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember 		                   
Shares Issued, Price Per Share                             $ 0.01us-gaap_SharesIssuedPricePerShare
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember 		 
Redemption Price Per Right           $ 0.0001prph_RedemptionPricePerRight
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember 		                   
Chief Operating Officer and Chief Financial Officer [Member]                                
Stockholders' Equity [Line Items]                                
Shares Issued During Period Share Based Compensation, Bonus Percentage             50.00%prph_SharesIssuedDuringPeriodShareBasedCompensationBonusPercentage
/ us-gaap_TitleOfIndividualAxis
= prph_ChiefOperatingOfficerAndChiefFinancialOfficerMember 		                 
Plan 1997 [Member]                                
Stockholders' Equity [Line Items]                                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                               1,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= prph_Plan1997Member
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Common Stock Shares Unissued 2,500,000prph_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodCommonStockSharesUnissued
/ us-gaap_PlanNameAxis
= prph_Plan1997Member 		            2,500,000prph_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodCommonStockSharesUnissued
/ us-gaap_PlanNameAxis
= prph_Plan1997Member 		               
Available for grant, Shares (in shares)                               900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_Plan1997Member
Plan 2010 [Member]                                
Stockholders' Equity [Line Items]                                
Options outstanding - Shares 1,713,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		            1,713,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		               
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 147,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		420,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		15,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		                         
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Common Stock Shares Unissued                               2,500,000prph_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodCommonStockSharesUnissued
/ us-gaap_PlanNameAxis
= prph_Plan2010Member
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   27,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		                           
Available for grant, Shares (in shares) 19,659us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		            19,659us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		               
Proceeds from exercise of stock options (In shares)   25,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= prph_Plan2010Member 		                           
Directors Plan 2010 [Member]                                
Stockholders' Equity [Line Items]                                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                               425,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Member
Available for grant, Shares (in shares) 41,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Member 		27,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Member 		0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Member 		        41,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Member 		    0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Member 		         
Directors Plan 2010 Fiscal 2011 Bonus [Member]                                
Stockholders' Equity [Line Items]                                
Shares Issued During Period Share Based Compensation, Bonus Percentage             50.00%prph_SharesIssuedDuringPeriodShareBasedCompensationBonusPercentage
/ us-gaap_PlanNameAxis
= prph_DirectorsPlan2010Fiscal2011BonusMember 		                 
Amended Option Plan 1997 [Member]                                
Stockholders' Equity [Line Items]                                
Options outstanding - Shares 26,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= prph_AmendedOptionPlan1997Member 		            26,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= prph_AmendedOptionPlan1997Member 		               
Share-Based Compensation Arrangement By Share-Based Payment Award Options Expected To Be Forfeited 4,500,000prph_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExpectedToBeForfeited
/ us-gaap_PlanNameAxis
= prph_AmendedOptionPlan1997Member 		                             
2010 Equity Compensation Plan [member]                                
Stockholders' Equity [Line Items]                                
Available for grant, Shares (in shares) 147,808us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_EquityCompensationPlan2010Member 		            147,808us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= prph_EquityCompensationPlan2010Member 		               
Common Stock [Member]                                
Stockholders' Equity [Line Items]                                
Proceeds from exercise of stock options (In shares)   25,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                           
Treasury Stock, Shares, Acquired 3,896,764us-gaap_TreasuryStockSharesAcquired
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                             
Proceeds From Issuance Of Common Stock     1,100,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                         
Stock Granted During Period Shares Employment Agreement 28,327prph_StockGrantedDuringPeriodSharesEmploymentAgreement
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		16,470prph_StockGrantedDuringPeriodSharesEmploymentAgreement
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		0prph_StockGrantedDuringPeriodSharesEmploymentAgreement
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                         
Common Stock [Member] | Settled Litigation [Member]                                
Stockholders' Equity [Line Items]                                
Stock Issued During Period, Shares, Other               300,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		               
Shares Issued, Price Per Share $ 1.31us-gaap_SharesIssuedPricePerShare
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		            $ 1.31us-gaap_SharesIssuedPricePerShare
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		               
Stock Issued During Period, Value, Other               393,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		               
Common Stock [Member] | Dutchess [Member]                                
Stockholders' Equity [Line Items]                                
Stock Issued During Period Shares Under Specific Agreement   164,474prph_StockIssuedDuringPeriodSharesUnderSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		883,722prph_StockIssuedDuringPeriodSharesUnderSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		          125,000prph_StockIssuedDuringPeriodSharesUnderSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		             
Stock Issued During Period Value Specific Agreement   250,000prph_StockIssuedDuringPeriodValueSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		            195,000prph_StockIssuedDuringPeriodValueSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		             
Proceeds from Issuance or Sale of Equity     839,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		            230,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		           
Common Stock [Member] | Dutchess [Member] | 2012 Equity Line of Credit [Member]                                
Stockholders' Equity [Line Items]                                
Stock Issued During Period Shares Under Specific Agreement                     698,207prph_StockIssuedDuringPeriodSharesUnderSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandTwelveEquityLineOfCreditMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		         
Stock Issued During Period Value Specific Agreement 1,200,000prph_StockIssuedDuringPeriodValueSpecificAgreement
/ dei_LegalEntityAxis
= prph_DutchessMember
/ us-gaap_ShortTermDebtTypeAxis
= prph_TwoThousandTwelveEquityLineOfCreditMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		                             
Common Stock [Member] | Plan 2010 [Member] | Chief Executive Officer [Member]                                
Stockholders' Equity [Line Items]                                
Stock Issued During Period, Shares, Other   50,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_PlanNameAxis
= prph_Plan2010Member
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember 		          100,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_PlanNameAxis
= prph_Plan2010Member
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember 		               
Stock Issued During Period, Value, Other   $ 82,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_PlanNameAxis
= prph_Plan2010Member
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember 		          $ 139,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_PlanNameAxis
= prph_Plan2010Member
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember