Annual report pursuant to Section 13 and 15(d)

Merger, Offering and Other Related Transactions (Details Textual)

v3.3.1.900
Merger, Offering and Other Related Transactions (Details Textual)
$ / shares in Units, shares in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Jun. 10, 2015
shares
Feb. 06, 2014
shares
Nov. 30, 2013
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Dec. 23, 2015
$ / shares
shares
Nov. 30, 2014
$ / shares
shares
Oct. 31, 2014
$ / shares
shares
Mar. 31, 2014
shares
Debt Instrument [Line Items]                    
Equity Issued During Period Units New Issues   9,720                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       14,851            
Proceeds from Convertible Debt | $       $ 0 $ 0 $ 2,000        
Repayments of Notes Payable | $       60 $ 2,596 $ 1,829        
Payments of Stock Issuance Costs | $       782            
Payment of Financing and Stock Issuance Costs, Total | $       $ 3,030            
Debt Instrument, Convertible, Conversion Price | $ / shares               $ 1.00    
Stock Issued During Period Shares Acquisitions Previously Held         4,501          
Stock Issued During Period Shares Acquisitions New Issues         779          
Equity Interest         6.80%          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                   14,410
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized       11,590            
Equity Incentive Plan 2014 [Member]                    
Debt Instrument [Line Items]                    
Equity Issued During Period Units New Issues Price Per Unit | $ / shares       $ 1.00            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       26,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized 11,590                  
Equity Incentive Plan 2014 [Member] | Conversion Date [Member]                    
Debt Instrument [Line Items]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       7,602            
Equity Incentive Plan 2014 [Member] | Merger Date [Member]                    
Debt Instrument [Line Items]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       2,300            
Series A Preferred Stock [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights             14,851      
Conversion Of Stock Conversion Ratio       1.6290            
Series A-2 Preferred Stock [Member]                    
Debt Instrument [Line Items]                    
Conversion Of Stock Conversion Ratio       1.9548            
Series B Preferred Stock [Member]                    
Debt Instrument [Line Items]                    
Conversion Of Stock Conversion Ratio       1.9548            
Equity Option [Member]                    
Debt Instrument [Line Items]                    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares         7,602          
Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Converted         4,989          
Common Stock [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 1.38            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       618            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares         42,616          
Stock Issued During Period, Shares, Acquisitions           5,280        
Conversion Of Stock Conversion Ratio       1.5238            
Common Stock [Member] | Pre Merger [Member]                    
Debt Instrument [Line Items]                    
Stock Issued During Period, Shares, Acquisitions         5,280          
Common Stock [Member] | Equity Incentive Plan 2014 [Member]                    
Debt Instrument [Line Items]                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       14,410            
Warrant [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 2.00     $ 1.25   $ 2.00  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       36,055     14,851   30,300  
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares         621          
2013 Bridge Loan [Member]                    
Debt Instrument [Line Items]                    
Equity Issued During Period Units New Issues       20,580            
Equity Issued During Period Units New Issues Price Per Unit | $ / shares       $ 1.00            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       5,000            
Proceeds from Convertible Debt | $       $ 25,300            
Repayments of Notes Payable | $       2,553            
Payments of Stock Issuance Costs | $       3,338            
Debt Instrument, Periodic Payment, Principal | $     $ 5,000              
Debt Instrument, Periodic Payment, Interest | $     $ 83              
Debt Instrument, Periodic Payment, Total | $       $ 5,083            
Bridge Notes Placement Agent Warrants [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 1.00            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       2,500            
Class of Warrant or Right Expiration Period       5 years            
Bridge warrants [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares     $ 1.00              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     5,000              
Class of Warrant or Right Expiration Period     3 years              
Debt Conversion, Converted Instrument, Warrants or Options Issued     2,500              
Bridge Agent Warrants [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 1.00            
Class of Warrant or Right Expiration Period       5 years            
Debt Conversion, Converted Instrument, Warrants or Options Issued       500            
PPO warrants [Member]                    
Debt Instrument [Line Items]                    
Equity Issued During Period Units New Issues       30,300            
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares               $ 2.00    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               22,756    
PPO warrants [Member] | 2013 Bridge Loan [Member]                    
Debt Instrument [Line Items]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 2.00            
Class of Warrant or Right Expiration Period       5 years