Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan - Stock Option Activity (Details)

v3.20.1
Equity Incentive Plan - Stock Option Activity (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Equity Incentive Plan        
Number of Options, Outstanding at beginning of year 174,175 138,324 138,324  
Number of Options, Granted 75,665 49,994    
Number of Options, Forfeited (3,333)      
Number of Options, Expired (8,812) (3,237)    
Number of Options, Outstanding at end of year 237,695 185,081 174,175 138,324
Number of Options, Exercisable at end of year 137,846 106,138    
Number of Options, Vested and expected to vest at end of year 237,695 185,081    
Weighted- Average Exercise Price, Outstanding at beginning of year $ 27.42 $ 34.17 $ 34.17  
Weighted- Average Exercise Price, Granted 6.55 7.20    
Weighted- Average Exercise Price, Forfeited 7.20      
Weighted- Average Exercise Price, Expired 11.06 16.25    
Weighted- Average Exercise Price, Outstanding at end of year 21.67 27.20 $ 27.42 $ 34.17
Weighted- Average Exercise Price, Exercisable at end of year 32.33 40.53    
Weighted- Average Exercise Price, Vested and expected to vest at end of year $ 21.67 $ 27.20    
Weighted-Average Contractual Life (In Years), Outstanding 7 years 6 months 11 days 6 years 7 months 6 days 6 years 2 months 19 days 5 years 11 months 12 days
Weighted-Average Contractual Life (In Years), Exercisable at end of year 6 years 18 days 5 years 5 months 16 days    
Weighted-Average Contractual Life (In Years), Vested and expected to vest at end of year 7 years 6 months 11 days 6 years 7 months 6 days