Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan - Additional Information (Details)

v3.20.2
Equity Incentive Plan - Additional Information (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 0 years 0 years  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 93,165 49,994  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     59,414
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years 3 months 11 days 2 years 10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 579,900 $ 368,200  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 6.26 $ 7.11  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 0 2  
Sharebased Compensation Arrangement by Sharebased Payment Award Equity Instruments Other than Options Granted in Period Fair Value $ 1,161,000 $ 1,122,000  
Number of Options, Granted 93,165 49,994  
One-year anniversary [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%    
24-month period [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 67.00%    
Holders Owing More Than Ten Percentage Voting Rights [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years
Holders Owing More Than Ten Percentage Voting Rights [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Percentage of Exercise Price     110.00%
Equity Incentive Plan 2014 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 582,672    
Equity Incentive Plan 2014 [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 582,672    
ESPP [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 7,806    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 11,371    
2014 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 176,524    
Excess Stock, Shares Authorized 23,333    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 49,000 0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 49,000