Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Summary of Stock Option Activity (Details)

v3.21.1
Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Outstanding, Aggregate Intrinsic Value $ 37 $ 24
Vested and expected to vest at March 31, 2021 Aggregate Intrinsic Value 37  
Exercisable at March 31, 2021, Aggregate Intrinsic Value $ 37  
Options Outstanding 1,443,940  
Options exercised (7,082)  
Options forfeited (4,180)  
Options expired (17,792)  
Options Outstanding 1,414,886 1,443,940
Options Vested and expected to vest at March 31, 2021 1,414,886  
Options exercisable at March 31, 2021 710,832  
Outstanding, Weighted average exercise price per share $ 3.64  
Options exercised, Weighted average exercise price per share 0.75  
Options forfeited, Weighted average exercise price per share 9.70  
Options expired, Weighted average exercise price per share 2.62  
Outstanding, Weighted average exercise price per share 3.65 $ 3.64
Vested and expected to vest at March 31, 2021, Weighted average exercise price per share 3.65  
Exercisable at March 31, 2021, Weighted average exercise price per share $ 4.18  
Outstanding, Weighted average remaining contractual life (in years) 7 years 7 months 28 days 7 years 9 months 25 days
Vested and expected to vest at March 31, 2021, Weighted average remaining contractual life (in years) 7 years 7 months 28 days  
Exercisable at March 31, 2021, Weighted average remaining contractual life (in years) 6 years 8 months 4 days