Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Non-vested RSUs (Details)

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Stockholders' Equity - Non-vested RSUs (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Weighted Average Grant Date Fair Value    
Stock-based compensation $ 3,284 $ 3,232
Restricted Stock Units    
Number of Shares    
Non-vested at beginning of period (in shares) 2,945,585 1,255,000
Granted (in shares) 2,536,850 2,500,585
Vested (in shares) (1,519,493) (572,500)
Forfeited/Cancelled (191,600) (237,500)
Non-vested at end of period (in shares) 3,771,342 2,945,585
Weighted Average Grant Date Fair Value    
Non-vested at beginning of period (in dollars per share) $ 0.73 $ 0.65
Granted (in dollars per share) 2.11 0.74
Vested (in dollars per share) 0.71 0.65
Forfeited (in dollars per share) 0.69 0.65
Non-vested at end of period (in dollars per share) $ 1.66 $ 0.73
Stock-based compensation $ 1,100 $ 500
Unrecognized compensation expense $ 6,100  
Weighted average remaining period for recognition of unrecognized compensation expense 3 years 6 months 25 days