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Stock-based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
segment
$ / shares
shares
Sep. 30, 2020
USD ($)
segment
$ / shares
shares
Dec. 31, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense | $ $ 1.3 $ 1.3  
Number of equity compensation plans | segment 2 2  
Automatic increase in shares to be issued (in percentage)     4.00%
Options, grants in period, weighted average grant date fair value (in USD per share) | $ / shares $ 0.34 $ 0.34  
2014 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant (in shares) 800,000 800,000  
2019 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant (in shares) 4,200,000 4,200,000  
Options outstanding, beginning balance (in shares) 4,268,277 4,268,277 731,189
Share-based payment arrangement, option | 2014 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options outstanding, beginning balance (in shares) 500,000 500,000  
Share-based payment arrangement, option | 2019 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options outstanding, beginning balance (in shares) 3,800,000 3,800,000  
Options to purchase common stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation expense related to options outstanding, weighted average period for expense to be recognized   2 years 2 months 12 days