Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Instruments (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Fair Value of Marketable Securities $ 6,776 $ 18,765
Level 1 [Member]    
Fair Value of Marketable Securities  
Level 2 [Member]    
Fair Value of Marketable Securities 6,776  
Level 3 [Member]    
Fair Value of Marketable Securities  
U.S. Government Obligations [Member]    
Fair Value of Marketable Securities 929  
U.S. Government Obligations [Member] | Level 1 [Member]    
Fair Value of Marketable Securities  
U.S. Government Obligations [Member] | Level 2 [Member]    
Fair Value of Marketable Securities 929  
U.S. Government Obligations [Member] | Level 3 [Member]    
Fair Value of Marketable Securities  
Corporate Obligations [Member]    
Fair Value of Marketable Securities 5,847  
Corporate Obligations [Member] | Level 1 [Member]    
Fair Value of Marketable Securities  
Corporate Obligations [Member] | Level 2 [Member]    
Fair Value of Marketable Securities 5,847  
Corporate Obligations [Member] | Level 3 [Member]    
Fair Value of Marketable Securities