Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement (Details Textual)

v3.10.0.1
Fair Value Measurement (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Jun. 01, 2017
Dec. 31, 2016
Nov. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Derivative Liability $ 156 $ 130   $ 20  
Fair Value Adjustment of Warrants $ 26 $ (692)      
Fair Values Assumptions Expected Term 1   4 years 25 days      
Fair Value Assumptions Expected Rates 0.00%        
Asset Impairment Charges $ 0 $ 10,300      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     210,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 55.138   $ 4.70   $ 55.10
Restructuring Costs $ 0 803      
Class of Warrant or Right, Outstanding         6,629
Maximum [Member] | Private Placement 2017 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 4.00
Class of Warrant or Right, Outstanding         36,231
Minimum [Member] | Private Placement 2017 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 5.00
Class of Warrant or Right, Outstanding         29,034
Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Derivative Liability $ 156 $ 130      
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Warrants To Purchase Common Stock 210,000 210,000      
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Expected Term [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Values Assumptions Expected Term 1 3 years 29 days        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Expected Term [Member] | Maximum [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Values Assumptions Expected Term 1 5 years        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Expected Term [Member] | Minimum [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Values Assumptions Expected Term 1 3 years 4 months 2 days        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Price Volatility [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 91.94% 73.37%      
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Price Volatility [Member] | Maximum [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 78.98%        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Price Volatility [Member] | Minimum [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 65.33%        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Risk Free Interest Rate [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 2.46% 2.09%      
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 1.95%        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 1.49%        
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] | Measurement Input, Expected Dividend Rate [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value Assumptions Expected Rates 0.00% 0.00%