Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan - Stock Option Activity (Details)

v3.21.1
Equity Incentive Plan - Stock Option Activity (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Equity Incentive Plan        
Number of Options, Outstanding at beginning of year 246,893 174,175 174,175  
Number of Options, Granted 130,865 75,665    
Number of Options, Expired (7,103) (8,812)    
Number of Options, Forfeited (296) (3,333)    
Number of Options, Outstanding at end of year 370,359 237,695 246,893 174,175
Number of Options, Exercisable at end of year 176,055 137,846    
Number of Options, Vested and expected to vest at end of year 370,359 237,695    
Weighted- Average Exercise Price, Outstanding at beginning of year $ 20.90 $ 27.42 $ 27.42  
Weighted- Average Exercise Price, Granted 6.46 6.55    
Weighted- Average Exercise Price, Expired 10.83 11.06    
Weighted- Average Exercise Price, Forfeited 6.78 7.20    
Weighted- Average Exercise Price, Outstanding at end of year 16.00 21.67 $ 20.90 $ 27.42
Weighted- Average Exercise Price, Exercisable at end of year 26.59 32.33    
Weighted- Average Exercise Price, Vested and expected to vest at end of year $ 16.00 $ 21.67    
Weighted-Average Remaining Contractual Life (In Years), Outstanding 7 years 8 months 12 days 7 years 6 months 11 days 7 years 2 months 12 days 6 years 2 months 19 days
Weighted-Average Remaining Contractual Life (In Years), Exercisable at end of year 6 years 4 months 6 days 6 years 18 days    
Weighted-Average Remaining Contractual Life (In Years), Vested and expected to vest at end of year 7 years 8 months 12 days 7 years 6 months 11 days