XML 29 R33.htm IDEA: XBRL DOCUMENT v3.20.1
Stockholders' Equity - Pre-2017 Non-Qualified Stock Options, Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation from issuance of options $ 686,599 $ 1,065,852  
Pre-2017 Non-Qualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options outstanding (in shares) 2,465,500   2,500,500
Options granted (in shares) 0    
Pre-2017 Non-Qualified Stock Options | Options to purchase common stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation from issuance of options $ 1,000 $ 50,000