Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plan (Details)

v3.21.1
Equity Incentive Plan (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity Incentive Plan      
Number of Options, Outstanding at beginning of year 174,175 138,324  
Number of Options, Granted 93,165 49,994  
Number of Options, Expired (17,114) (9,274)  
Number of Options, Forfeited (3,333) (4,869)  
Number of Options, Outstanding at end of year 246,893 174,175 138,324
Number of Options, Exercisable at end of year 142,061    
Number of Options, Vested and expected to vest at end of year 246,893    
Weighted- Average Exercise Price, Outstanding at beginning of year $ 27.42 $ 34.17  
Weighted- Average Exercise Price, Granted 6.31 7.20  
Weighted- Average Exercise Price, Expired 10.59 28.58  
Weighted- Average Exercise Price, Forfeited 7.20 9.19  
Weighted- Average Exercise Price, Outstanding at end of year 20.90 $ 27.42 $ 34.17
Weighted- Average Exercise Price, Exercisable at end of year 31.58    
Weighted- Average Exercise Price, Vested and expected to vest at end of year $ 20.90    
Weighted-Average Remaining Contractual Life (In Years), Outstanding 7 years 2 months 12 days 6 years 2 months 19 days 5 years 11 months 12 days
Weighted-Average Remaining Contractual Life (In Years), Exercisable at end of year 5 years 10 months 6 days    
Weighted-Average Remaining Contractual Life (In Years), Vested and expected to vest at end of year 7 years 2 months 12 days