Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Additional Information (Detail)

v3.20.2
Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
May 31, 2020
Mar. 31, 2020
May 31, 2019
Oct. 31, 2018
May 31, 2016
Aug. 31, 2015
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Nov. 02, 2012
Non-Qualified Stock Options                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock units granted 86,764   60,742 105,398                
Restricted stock units\non-qualified stock options, granted description                 One third of the NQOs will vest and become exercisable on each of the first, second and third anniversaries of the grant date.      
Fair value assumptions, strike price $ 10.18   $ 14.54 $ 13.97                
Fair value assumptions, risk free rate 0.64%   2.32% 2.94%                
Fair value assumptions, expiration 10 years   5 years 5 years                
Fair value assumptions, volatility 48.00%   34.20% 32.70%                
Compensation expense forfeiture rate 1.00%   1.00% 1.00%                
Compensation expense               $ 445   $ 2,166    
Unrecognized compensation expense related to unvested awards                     $ 945  
Recognition period of unrecognized compensation expense related to unvested awards                     1 year 7 months 13 days  
Restricted Stock Units                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock units granted                 57,358 34,388    
Compensation expense             $ 192   $ 456      
Unrecognized compensation expense related to unvested awards             $ 1,543   $ 1,543      
Recognition period of unrecognized compensation expense related to unvested awards                 1 year 10 months 28 days      
2012 Equity Incentive Plan                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Shares reserved for issuance             345,428   345,428      
Shares reserved for issuance, authorized                       1,687,500
Restricted stock units granted         3,791 966,510            
Fair Value per unit         $ 13.19 $ 13.23            
Restricted stock units\non-qualified stock options, granted description                 Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.      
2012 Equity Incentive Plan | Employee                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock units granted 49,116   34,388   7,582              
Fair Value per unit $ 10.11   $ 14.54   $ 13.19              
Restricted stock units\non-qualified stock options, granted description                 Twenty-five percent of the RSUs granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date      
2012 Equity Incentive Plan | Board of Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock units granted   8,242     3,000              
Fair Value per unit   $ 11.83     $ 13.19              
Restricted stock units\non-qualified stock options, granted description                 One hundred percent of the RSUs granted vested and settled on the first anniversary of the grant date.      
2012 Equity Incentive Plan | Board of Directors | Restricted Stock Units                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock units\non-qualified stock options, granted description                 All of the RSUs granted vest on the third anniversary of the grant date      
2012 Equity Incentive Plan | First Anniversary                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage         25.00% 25.00%            
2012 Equity Incentive Plan | First Anniversary | Employee                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage 25.00%   25.00%   25.00%              
2012 Equity Incentive Plan | First Anniversary | Board of Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage   0.33%     100.00%              
2012 Equity Incentive Plan | Second Anniversary                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage         25.00% 25.00%            
2012 Equity Incentive Plan | Second Anniversary | Employee                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage 25.00%   25.00%   25.00%              
2012 Equity Incentive Plan | Second Anniversary | Board of Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage   0.33%                    
2012 Equity Incentive Plan | Third Anniversary                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage         25.00% 25.00%            
2012 Equity Incentive Plan | Third Anniversary | Employee                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage 25.00%   25.00%   25.00%              
2012 Equity Incentive Plan | Third Anniversary | Board of Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage   0.33%                    
2012 Equity Incentive Plan | Fourth Anniversary                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage         25.00% 25.00%            
2012 Equity Incentive Plan | Fourth Anniversary | Employee                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage 25.00%   25.00%   25.00%              
2012 Equity Incentive Plan | Fourth Anniversary | Board of Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Restricted stock, vesting percentage   0.33%