Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation and Warrants - Narrative (Details)

v3.21.2
Stock-Based Compensation and Warrants - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Apr. 30, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation           $ 2,442,000 $ 1,316,000  
Employer payroll taxes     $ 400,000          
Options outstanding (in shares)   1,259,852       1,259,852   1,707,008
Warrants available   125,000       125,000   865,000
Warrants minimum exercise price               $ 1.63
Warrants maximum exercise price               $ 2.61
Strike price   $ 1.63       $ 1.63    
Anson Investments Master Fund LP                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise of warrants (in shares)       450,971        
Warrants exercised       640,000        
Ontario Limited                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise of warrants (in shares) 100,000              
Aggregate consideration, warrant exercise $ 261,000              
Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fair value of options vested           $ 100,000    
General and Administrative Expense.                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation   $ 700,000     $ 500,000 2,800,000 1,300,000  
Stock Options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unrecognized compensation cost related to non-vested awards   100,000       $ 100,000    
Unrecognized compensation cost, recognition period           6 months    
Restricted Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unrecognized compensation cost related to non-vested awards   $ 7,700,000       $ 7,700,000    
Unrecognized compensation cost, recognition period           3 years 2 months 12 days    
Milestone-Based Options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation       $ 300,000        
Equity Incentive Plan 2019                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Remaining shares available for issuance   147,256       147,256    
Director | Restricted Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation   $ 200,000     $ 100,000 $ 400,000 $ 300,000