Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Status Of Options (Details)

v3.20.1
Stockholders' Equity - Status Of Options (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]      
Number of shares outstanding (in shares) 3,463,692 1,694,068 578,813
Weighted-average exercise (dollars per share) $ 3.71 $ 4.57 $ 6.51
Weighted-average remaining life 3 years 5 months 8 days    
Intrinsic value, outstanding options $ 0    
Number of shares vested and exercisable (in shares) 1,096,071    
Number of shares, weighted average price per share (dollars per share) $ 3.74    
Exercisable period of shares 2 years 3 months 10 days