Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Stock-Based Compensation And Other Benefit Plans (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2018
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock options, authorized     2,404,442    
Stock option granted, reduction ratio for numbers authorized     1    
Stock-based compensation     $ 1,098 $ 192 $ 3,810
Tax benefits related to stock based compensation     $ 0    
Options exercised     37,000    
Number of Shares Underlying Options, Granted     1,629,000    
Weighted Average Exercise Price Per Share, Granted     $ 0.99 $ 1.14 $ 4.41
Weighted Average Grant Price, Awards granted     $ 0.49 $ 0.49 $ 1.65
Other benefit plans, cost     $ 200 $ 300 $ 400
Cash proceeds from stock options exercised     $ 39 $ 0 0
Non-Employee Grants [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of Shares Underlying Options, Granted     465,950    
Stock Option [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards, vesting period     5 years    
Options exercised       0  
Total intrinsic value of options exercised     $ 0   300
Number of Shares Underlying Options, Granted     1,162,930    
Unrecognized compensation costs     $ 300    
Compensation costs expected to be recognized     1 year 6 months    
Stock Option [Member] | Subsequent Event [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of Shares Underlying Options, Granted 494,941        
Weighted Average Exercise Price Per Share, Granted $ 0.86        
Stock Option [Member] | Employee Grants Of 1,162,930 [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards, vesting period     3 years    
Restricted Stock [Member]          
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 7 months 6 days    
Vest-date fair value     $ 300 $ 600 $ 700
Awards granted     426,000    
Weighted Average Grant Price, Awards granted     $ 0.98    
Weighted Average Grant Price, Awards granted     $ 0.98 $ 1.11 $ 3.34
Restricted Stock [Member] | Subsequent Event [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards granted 323,474        
Weighted Average Grant Price, Awards granted $ 0.86        
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 Spread     300.00%    
Share-Based Compensation Arrangement By Share-Based Payment Award Grant Date Share Price     $ 1.04 $ 1.04  
Stock-based compensation     $ 100 $ 25  
Awards, vesting period     3 years    
Award granted life     5 years    
Awards granted   815,355 1,049,528    
Weighted Average Grant Price, Awards granted     $ 1.20    
Stock Appreciation Rights (SARs) [Member] | Subsequent Event [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Awards granted 2,373,411        
Weighted Average Grant Price, Awards granted $ 0.86        
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    
Maximum [Member] | 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%