Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation And Other Benefit Plans (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation And Other Benefit Plans (Narrative) (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Feb. 28, 2019
$ / shares
shares
Feb. 28, 2018
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock options, authorized | shares     1,112,527    
Stock option granted, reduction ratio for numbers authorized     1    
Stock-based compensation | $     $ 2,306 $ 1,098 $ 192
Tax benefits related to stock based compensation | $     $ 0    
Number of Shares Underlying Options, Granted | shares     671,000    
Weighted Average Exercise Price Per Share, Granted     $ 1.05 $ 0.99 $ 1.14
Weighted Average Grant Price, Awards granted     $ 0.68 $ 0.49 $ 0.49
Other benefit plans, cost | $     $ 300 $ 200 $ 300
Options exercised | shares     528,000   0
Cash proceeds from stock options exercised | $     $ 500 39,000 $ 0
Non-Employee Grants [Member] | Non-Employee Director [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Options granted, exercise price     $ 1.60    
Number of Shares Underlying Options, Granted | shares     175,644    
Stock Option [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards, vesting period     5 years    
Total intrinsic value of options exercised | $     $ 600 0  
Number of Shares Underlying Options, Granted | shares   622,140 494,941    
Weighted Average Exercise Price Per Share, Granted   $ 2.33      
Unrecognized compensation costs | $     $ 200    
Compensation costs expected to be recognized     1 year 1 month 6 days    
Stock Option [Member] | Employees [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards, vesting period     3 years    
Options granted, exercise price     $ 0.86    
Restricted Stock          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards, vesting period     3 years    
Unrecognized compensation costs | $     $ 200    
Compensation costs expected to be recognized     1 year 2 months 12 days    
Vest-date fair value | $     $ 400 $ 300 $ 600
Awards granted | shares   174,464 398,000    
Weighted Average Grant Price, Awards granted   $ 2.33 $ 1.00    
Weighted Average Grant Price, Awards granted     $ 1.71 $ 0.98 $ 1.11
Stock Appreciation Rights (SARs) [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share-Based Compensation Arrangement By Share-Based Payment Award Life     5 years    
Share-Based Compensation Arrangement By Share-Based Payment Award Grant Date Share Price         $ 1.04
Stock-based compensation | $     $ 1,600    
Awards, vesting period     3 years    
Award granted life     5 years    
Awards granted | shares   2,373,411 2,373,000 1,049,528 815,355
Weighted Average Grant Price, Awards granted   $ 0.86   $ 1.20  
Stock Appreciation Rights (SARs) [Member] | First Vesting Milestone [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share-based compensation, vesting hurdle share price       1.30  
Stock Appreciation Rights (SARs) [Member] | Second Vesting Milestone [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share-based compensation, vesting hurdle share price       1.50  
Stock Appreciation Rights (SARs) [Member] | Third Vesting Milestone [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share-based compensation, vesting hurdle share price       $ 1.75  
Stock Appreciation Rights (SARs) [Member] | Subsequent Event          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards, vesting period 3 years        
Award granted life 5 years        
Awards granted | shares 951,699        
Weighted Average Grant Price, Awards granted $ 2.33        
Maximum | Stock Appreciation Rights (SARs) [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share-Based Compensation Arrangement By Share-Based Payment Award Spread         300.00%