Quarterly report pursuant to Section 13 or 15(d)

Capital Transactions - Restricted Stock Units Narrative (Details)

v3.19.1
Capital Transactions - Restricted Stock Units Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Discount for lack of marketability ( as a percent) 11.90%    
Award performance period 3 years    
Expected volatility (as a percent) 50.00%    
Risk free interest rate, minimum 2.10%    
Risk free interest rate, maximum 2.90%    
Share-based compensation expense $ 100,000 $ 500,000  
Unrecognized share-based compensation expense $ 2,300,000   $ 1,800,000
Weighted-average period over which the remaining compensation expense is expected to be recognized 1 year 8 months    
Minimum statutory withholding requirement paid on behalf of employees (in shares) 11,000 40,000  
Performance-Based Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 100,000 $ 0  
Performance-Based Restricted Stock Units (RSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Potential compensation expense $ 2,700,000    
2012 Stock Incentive Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted (in shares) 281,000    
2012 Stock Incentive Plan | Restricted Stock Units (RSUs) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 12 months    
2012 Stock Incentive Plan | Restricted Stock Units (RSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 36 months    
2012 Stock Incentive Plan | Time-Based Restricted Stock Units (RSUs)      
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) $ 8.61    
2012 Stock Incentive Plan | Performance-Based Restricted Stock Units (RSUs)      
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) $ 4.38    
Director | 2012 Stock Incentive Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restriction period 2 years    
Number of shares subject to restriction period 93,000   80,000