Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies (Details Textual)

v3.6.0.2
Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
May 31, 2016
Sep. 29, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]          
Less change in fair value of warrant liability     $ 825 $ (4,512) $ 1,083
Investments, Fair Value Disclosure     14,000    
Share-based Compensation     1,039 1,026 543
Comprehensive Income (Loss), Net of Tax, Attributable to Parent     $ 5,100 (11,300) $ (2,400)
Stockholders' Equity, Reverse Stock Split   Board effected the Reverse Split of the outstanding shares of our common stock at a ratio of one (1) share for every five and one-half (5.5) shares outstanding, so that every five and one-half (5.5) outstanding shares of common stock before the Reverse Split represents one (1) share of common stock after the Reverse Split. 1 for 5.5 reverse stock split effected in September 2015    
Revenue Recognition, Milestone Method, Revenue Recognized $ 15,000        
Money Market Funds, at Carrying Value     $ 13,700 7,600  
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]          
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]          
Investments, Fair Value Disclosure     $ 13,700 $ 7,600