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Summary of Significant Accounting Policies (Details Textual) (USD $)
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3 Months Ended | 12 Months Ended | ||
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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| Accounting Policies [Line Items] | ||||
| Inventory Adjustments | $ 505,000us-gaap_InventoryAdjustments | $ 797,000us-gaap_InventoryAdjustments | ||
| Cash and Cash Equivalents, At Carrying Value | 5,021,000us-gaap_CashAndCashEquivalentsAtCarryingValue | 5,519,000us-gaap_CashAndCashEquivalentsAtCarryingValue | 2,926,000us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,638,000us-gaap_CashAndCashEquivalentsAtCarryingValue |
| Cash, FDIC Insured Amount | 582,000us-gaap_CashFDICInsuredAmount | |||
| Cash, Uninsured Amount | 4,700,000us-gaap_CashUninsuredAmount | |||
| Due from Banks | 5,300,000us-gaap_DueFromBanks | |||
| Provision of Sales Allowance | 55,000us-gaap_SalesAllowancesGoods | 129,000us-gaap_SalesAllowancesGoods | ||
| Marketing and Advertising Expense | 3,100,000us-gaap_MarketingAndAdvertisingExpense | 3,400,000us-gaap_MarketingAndAdvertisingExpense | ||
| Prepaid expenses and other current assets | 670,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 1,404,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent | ||
| Research and development | 208,000us-gaap_ResearchAndDevelopmentExpense | 278,000us-gaap_ResearchAndDevelopmentExpense | ||
| Common Stock, par value (in dollars per share) | $ 0.0005us-gaap_CommonStockParOrStatedValuePerShare | $ 0.0005us-gaap_CommonStockParOrStatedValuePerShare | ||
| Share-based Compensation | 34,000us-gaap_ShareBasedCompensation | 64,000us-gaap_ShareBasedCompensation | ||
| Estimated Future Sales Return [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Accrued Liabilities |
1,500,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent / prph_AccruedAdvertisingAndOtherAllowancesAxis = prph_EstimatedFutureSalesReturnMember |
1,500,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent / prph_AccruedAdvertisingAndOtherAllowancesAxis = prph_EstimatedFutureSalesReturnMember |
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| Cooperative Incentive [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Accrued Liabilities |
1,600,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent / prph_AccruedAdvertisingAndOtherAllowancesAxis = prph_CooperativeIncentiveMember |
2,100,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent / prph_AccruedAdvertisingAndOtherAllowancesAxis = prph_CooperativeIncentiveMember |
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| Sales Revenue, Goods, Net [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Concentration Risk, Percentage |
93.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember |
95.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember |
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| Building and Building Improvements [Member] | Maximum [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Property, Plant and Equipment, Useful Life | 39 years | |||
| Building and Building Improvements [Member] | Minimum [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Property, Plant and Equipment, Useful Life | 10 years | |||
| Machinery and Equipment [Member] | Maximum [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Property, Plant and Equipment, Useful Life | 7 years | |||
| Machinery and Equipment [Member] | Minimum [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Property, Plant and Equipment, Useful Life | 3 years | |||
| Computer Software, Intangible Asset [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Property, Plant and Equipment, Useful Life | 3 years | |||
| Furniture and Fixtures [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Property, Plant and Equipment, Useful Life | 5 years | |||
| Advertising and Incentive Promotion Costs [Member] | ||||
| Accounting Policies [Line Items] | ||||
| Prepaid expenses and other current assets |
$ 172,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent / prph_OtherOperatingCostAndExpenseGeneralComponentAxis = prph_AdvertisingAndIncentivePromotionCostsMember |
$ 885,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent / prph_OtherOperatingCostAndExpenseGeneralComponentAxis = prph_AdvertisingAndIncentivePromotionCostsMember |
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- Definition
Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation. No definition available.
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- Definition
The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available.
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- Definition
Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
A bank's noninterest bearing demand deposits in other banks (such as correspondents). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Certain changes made in the current period to the value and amount of inventory reported. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total expense recognized in the period for promotion, public relations, and brand or product advertising. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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- Definition
The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate selling price reductions recognized during an accounting period including, but not limited to, the sale of defective or nonconforming goods, a strategy to increase sales (generally over the short-term), move slow-moving items, develop distribution channels, or reward valuable customers. Allowances are a deduction from gross revenue in arriving at net revenue. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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