Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Market Based Restricted Stock (Details)

v3.8.0.1
Shareholders' Equity - Market Based Restricted Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Aug. 18, 2016
Apr. 29, 2017
Oct. 29, 2016
Apr. 30, 2016
May 02, 2015
Feb. 03, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, shares           2,028,000
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value $ 1,800          
Total grant date fair value per share           $ 1.32
Restricted Stock - Total Shareholder Return [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, shares   561,981 231,799 179,156 106,963  
Award Vesting Period   3 years 3 years 3 years 3 years  
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value   $ 860 $ 422 $ 224 $ 777  
Total grant date fair value per share   $ 1.53 $ 1.82   $ 7.26  
Expected volatility rate   75.00% 77.00%      
Weighted average expected life (in years)   3 years   3 years 3 years  
Risk-free interest rate   1.50% 0.76%   0.90%  
Less than 33% [Member] | Restricted Stock - Total Shareholder Return [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Units Vested   0.00% 0.00% 0.00% 0.00%  
Greater than 33% [Member] | Restricted Stock - Total Shareholder Return [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Units Vested   50.00% 50.00% 50.00% 50.00%  
Greater than 50% [Member] | Restricted Stock - Total Shareholder Return [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Units Vested   100.00% 100.00% 100.00% 100.00%  
Greater than 100% [Member] | Restricted Stock - Total Shareholder Return [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Units Vested   150.00% 150.00% 150.00% 150.00%  
Market Based Stock Restricted Stock Awards [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, shares 625,000          
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value $ 958          
Expected volatility rate 86.00%          
Weighted average expected life (in years) 1 year 2 months 12 days          
Risk-free interest rate 1.50%          
Tranche 1 (immediate) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of Units Vested 33.30%          
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value per share $ 1.60          
Weighted average expected life (in years) 0 years          
Tranche 2 ($4.00/share) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of consecutive trading days 20 days          
Average closing price for 20 consecutive trading days, Lower range limit for vesting $ 4.00          
Continuous employment requisite period 1 year          
Vesting expiration period from date of grant 10 years          
Percentage of Units Vested 33.30%          
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value per share $ 1.52          
Weighted average expected life (in years) 1 year 5 months 15 days          
Tranche 3 ($6.00/share) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of consecutive trading days 20 days          
Average closing price for 20 consecutive trading days, Lower range limit for vesting $ 6.00          
Continuous employment requisite period 2 years          
Vesting expiration period from date of grant 10 years          
Percentage of Units Vested 33.30%          
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value per share $ 1.48          
Weighted average expected life (in years) 2 years 2 months 19 days          
Minimum [Member] | Restricted Stock - Total Shareholder Return [Member]            
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value per share       $ 0.98    
Expected volatility rate       71.00% 54.00%  
Risk-free interest rate       0.90%    
Maximum [Member] | Restricted Stock - Total Shareholder Return [Member]            
Fair Value Assumptions and Methodology [Abstract]            
Total grant date fair value per share       $ 1.72    
Expected volatility rate       73.00% 55.00%  
Risk-free interest rate       1.00%