XML 49 R79.htm IDEA: XBRL DOCUMENT v3.20.1
Stock-Based Compensation - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 15, 2019
Sep. 30, 2013
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
May 17, 2018
May 08, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award contractual life     10 years        
2013 Equity Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted (in shares)     0        
Shares available for grant     6,013        
Expected term in years         6 years 9 months 7 days    
Expected forfeiture rate over contractual term     3.10%        
Remaining weighted-average vesting period     6 years 6 months 26 days        
Total intrinsic value of options exercised     $ 350,414        
2013 Equity Incentive Plan | Equity option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)   324,013          
Market value of stock (in dollars per share)             $ 16.89
Granted (in shares)   322,000          
2013 Equity Incentive Plan | Restricted stock awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized compensation cost, nonvested awards     1,800,000        
2018 Equity Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation expense     $ 224,000        
Shares available for grant     336,345        
2018 Equity Incentive Plan | Equity option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares 50,655            
2018 Equity Incentive Plan | Restricted stock awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)           163,000  
Shares 20,215            
2018 Equity Incentive Plan | Equity option and restricted stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized (in shares)           650,000  
Market value of stock (in dollars per share) $ 48.74            
2013 and 2018 Equity Incentive Plans              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation expense       $ 262,000      
2013 and 2018 Equity Incentive Plans | Equity option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award contractual life     10 years        
Expiration period     10 years        
Unrecognized compensation cost, nonvested awards     $ 1,300,000        
Remaining weighted-average vesting period     3 years 8 months 12 days        
One year vesting | 2013 and 2018 Equity Incentive Plans | Equity option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected term in years     5 years 6 months        
One year vesting | 2013 and 2018 Equity Incentive Plans | Equity option | Directors Excluding CEO              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period     1 year        
Five year vesting | 2013 and 2018 Equity Incentive Plans | Equity option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Annual award vesting percentage     20.00%        
Expected term in years     6 years 6 months        
Five year vesting | 2013 and 2018 Equity Incentive Plans | Equity option | Officers And Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period     5 years