Quarterly report pursuant to Section 13 or 15(d)

Capital Transactions - Narrative (Details)

v3.20.1
Capital Transactions - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2015
Dec. 31, 2019
Dec. 31, 2012
2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized under the plan (in shares)         1,500,000
Additional number of shares authorized under the plan (in shares)     1,500,000    
Number of shares granted (in shares) 0        
Maximum | 2009 Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized under the plan (in shares) 400,000        
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Aggregate intrinsic value, outstanding $ 100,000     $ 100,000  
Options outstanding (in shares) 290,000     290,000  
Time-based stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 0 $ 0      
Unrecognized share-based compensation expense $ 0     $ 0  
Time-based stock options | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 48 months        
Performance based stock options operating income margins          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Operating income margin, one (as a percent) 6.00%        
Operating income margin, two (as a percent) 8.00%        
Operating income margin, three (as a percent) 10.00%        
Unvested stock options outstanding (in shares) 0     0  
Performance based stock options operating income margins | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award performance period 1 year        
Performance based stock options operating income margins | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award performance period 1 year 3 months        
RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 300,000 $ 100,000      
Unrecognized share-based compensation expense $ 2,500,000     $ 1,100,000  
Discount for lack of marketability 13.40%        
Award performance period 3 years        
Expected volatility (as a percent) 50.00%        
Weighted-average period over which the remaining compensation cost is expected to be recognized 1 year 1 month 6 days        
Minimum withholding requirements (in shares) 22,000 11,000      
RSUs | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares) 630,000        
RSUs | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Risk-free interest rate (as a percent) 2.10%        
RSUs | Minimum | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 12 months        
RSUs | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Risk-free interest rate (as a percent) 2.90%        
RSUs | Maximum | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 36 months        
RSUs | Director | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restriction period for issuance of shares two years        
Nonvested subject to restriction period (in shares) 91,000     95,000  
Time-Based Restricted Stock Units (RSUs) | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average grant date fair value (in dollars per share) $ 7.83        
Time-Based Restricted Stock Units (RSUs) | Minimum | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 1 year        
Time-Based Restricted Stock Units (RSUs) | Maximum | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 3 years        
Performance-Based Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 100,000 $ 100,000      
Share based compensation potential compensation expense to be recognized $ 1,500,000        
Performance-Based Restricted Stock Units (RSUs) | 2012 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 3 years        
Weighted-average grant date fair value (in dollars per share) $ 4.51        
Performance-Based Restricted Stock Units (RSUs) | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation potential compensation expense to be recognized $ 3,700,000