Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Measurement of Fairvalue of Assets and Liabilities (Details)

v3.19.3
Stockholders' Equity - Measurement of Fairvalue of Assets and Liabilities (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
$ / shares
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
$ / shares
Sep. 30, 2018
USD ($)
Aug. 07, 2019
$ / shares
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning balance     $ 0    
Warrant liability     1,429,000    
Non-cash gain on changes in fair value $ (1,041,000) $ (141,000) (1,066,000) $ (141,000)  
Ending balance $ 388,000   388,000    
Other Operating Income (Expense) [Member]          
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Non-cash gain on changes in fair value     $ (1,041,000)    
Volatility          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Warrants and rights outstanding 97   97   87
Risk-free Interest Rate          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Warrants and rights outstanding 1.6   1.6   1.5
Dividend Rate          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Warrants and rights outstanding | $ / shares 0   0   0
Expected Term (in years)          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Warrants and rights outstanding 4.8   4.8   4.9
Weighted-Average Fair Value per share warrant          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Warrants and rights outstanding | $ / shares 0.14   0.14   0.50