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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jul. 27, 2021
Apr. 03, 2020
Nov. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized stock based compensation expense $ 2,429   $ 2,429        
Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock shares issued (in shares)     14,000        
Grant date fair value per share (in dollars per share)     $ 3.07        
2012 Equity Incentive Plan | Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock shares issued (in shares)     14,000        
Stock compensation expense recognized $ 572 $ 943 $ 1,252 $ 1,968      
2012 Equity Incentive Plan | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares vest over period     1 year        
2012 Equity Incentive Plan | Minimum | Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Grant date fair value per share (in dollars per share)     $ 2.44        
2012 Equity Incentive Plan | Maximum | Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Grant date fair value per share (in dollars per share)     $ 7.79        
Shares vest over period     4 years        
2016 Omnibus Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock shares authorized for issuance (in shares)           2,088,000 3,911,000
2016 Omnibus Incentive Plan | Subsequent Event [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock shares authorized for issuance (in shares)         231,000    
2016 Employee Stock Purchase Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Purchase interval period     6 months        
Percentage of purchase price to fair market value     85.00%        
Percentage of purchase limit on gross compensation 20.00%   20.00%