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Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jul. 29, 2020
Jul. 28, 2020
Dec. 31, 2019
May 16, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock authorized (shares) 75,000,000   75,000,000        
Common stock par value (usd per share) $ 0.0001   $ 0.0001        
Preferred stock authorized (shares) 25,000,000   25,000,000        
Preferred stock par value (usd per share) $ 0.0001   $ 0.0001        
Options outstanding (shares) 0   0     0  
Common stock outstanding (shares) 19,023,795   19,023,795     19,071,614  
Preferred stock outstanding (shares) 0   0     0  
Subsequent Event              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Dividend rate (usd per share)       $ 0.125      
Dividends declared       $ 2.4      
2012 Equity Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares reserved for future issuance (in shares)             2,194,986
2012 Equity Plan | Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     1 year        
2012 Equity Plan | Contingent RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
Equity instruments other than options, nonvested (shares) 467,328   467,328        
2012 Equity Plan | Non-contingent RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
2012 Equity Plan | Restricted Stock and Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Equity instruments other than options, nonvested (shares) 923,363   923,363     419,426  
Compensation cost not yet recognized, share-based awards other than options $ 6.6   $ 6.6        
Weighted-average period over which cost is expected to be recognized     1 year 10 months 24 days        
2020 Equity Plan | Contingent RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
2020 Equity Plan | Non-contingent RSUs              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
2020 Equity Plan | Restricted Stock and Restricted Stock Units (RSUs) | Subsequent Event              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares reserved for future issuance (in shares)         1,699,950    
ESPP              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares reserved for future issuance (in shares) 250,000   250,000        
Award required holding period     2 years        
Stock purchased during period (shares) 18,586 9,876 18,586        
Stock purchased during period, value $ 0.2 $ 0.1          
ESPP | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Offering period, maximum     6 months