Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Stock Option Activity (Details)

v3.21.1
Stock Based Compensation - Stock Option Activity (Details) - $ / shares
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 5 years 9 months 18 days 5 years 6 months  
Options      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Number of options exercisable (in shares) 1,264,205   1,264,205
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]      
Weighted average exercise price per option, exercisable (in usd per share) $ 1.44   $ 1.44
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Weighted Average Remaining Contractual Life (Years)     6 years 6 months
Options | Directors, Officers, Consultants and Employees      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Number of options outstanding, beginning balance (in shares)     2,351,240
Number of options outstanding, granted (in shares)     0
Number of options outstanding, exercised (in shares)     (743,535)
Number of options outstanding, forfeited (in shares)     0
Number of options outstanding, expired (in shares)     (29,000)
Number of options outstanding, ending balance (in shares) 1,578,705 2,351,240 1,578,705
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]      
Weighted average exercise price, beginning balance (in usd per share)     $ 2.00
Weighted average exercise price per option granted, exercise price (in usd per share)     0
Weighted average exercise price per option exercised, exercise price (in usd per share)     3.15
Weighted average exercise price per option forfeited, exercise price (in usd per share)     0
Weighted average exercise price per option expired, exercise price (in usd per share)     4.99
Weighted average exercise price, ending balance (in usd per share) $ 1.41 $ 2.00 1.41
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Weighted average grant date fair value per option (in usd per share)     $ 0