Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan - Stock Option Activity (Details)

v3.19.3
Equity Incentive Plan - Stock Option Activity (Details) - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Equity Incentive Plan        
Number of Options, Outstanding at beginning of year 138,324 127,310 127,310  
Number of Options, Granted 49,994 27,687    
Number of Options, Forfeited (4,869) (1,567)    
Number of Options, Expired (3,237) (7,684)    
Number of Options, Outstanding at end of period 180,212 145,746 138,324 127,310
Number of Options, Exercisable at end of period 120,527 96,863    
Number of Options, Vested and expected to vest at end of period 180,212 145,746    
Weighted- Average Exercise Price, Outstanding at beginning of year $ 34.17 $ 38.14 $ 38.14  
Weighted- Average Exercise Price, Granted 7.20 8.55    
Weighted- Average Exercise Price, Forfeited 9.19 15.95    
Weighted- Average Exercise Price, Expired 16.25 19.51    
Weighted- Average Exercise Price, Outstanding at end of period 27.68 33.74 $ 34.17 $ 38.14
Weighted- Average Exercise Price, Exercisable at end of period 37.25 43.10    
Weighted- Average Exercise Price, Vested and expected to vest at end of period $ 27.68 $ 33.74    
Weighted-Average Contractual Life (In Years), Outstanding 6 years 6 months 26 days 6 years 1 month 2 days 6 years 6 months 4 days 5 years 9 months 29 days
Weighted-Average Contractual Life (In Years), Exercisable at end of period 5 years 3 months 26 days 5 years 5 months 5 days    
Weighted-Average Contractual Life (In Years), Vested and expected to vest at end of period 6 years 6 months 26 days 6 years 1 month 2 days