Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan - Additional Information (Details)

v3.21.2
Equity Incentive Plan - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2010
Jan. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]            
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding And Exercisable Intrinsic Value $ 0 $ 0 $ 0      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 93,165 150,365 93,165      
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 3 days 2 years 3 months 10 days      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value   $ 909,000 $ 580,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 6.12 $ 6.26      
Sharebased Compensation Arrangement by Sharebased Payment Award Equity Instruments Other than Options Granted in Period Fair Value   $ 1,117,000 $ 1,161,000      
Number of Options, Granted 93,165 150,365        
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%  
Holders Owing More Than Ten Percentage Voting Rights [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, Award Vesting Period       10 years    
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   806,005        
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   264,337        
Excess Stock, Shares Authorized   200,000       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   2,051        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 49,000 0 49,000      
Restricted Stock | 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%        
Restricted Stock | 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%