Annual report pursuant to Section 13 and 15(d)

Note 15 - Share-based Compensation and Employee Benefit Plans - Changes in Stock Options Outstanding (Details)

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Note 15 - Share-based Compensation and Employee Benefit Plans - Changes in Stock Options Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2018
Mar. 25, 2017
Mar. 26, 2016
Outstanding, Shares (in shares) 1,104,500 1,592,200  
Outstanding, weighted average exercise price (in dollars per share) $ 1.41 $ 1.52  
Outstanding, Weighted average remaining contractual terms (Year) 8 years 6 years 36 days 6 years 292 days
Outstanding $ 3 $ 69
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 856,000 148,000  
Granted, weighted average exercise price (in dollars per share) $ 0.34 $ 0.97  
Granted, Weighted average remaining contractual terms (Year) 10 years  
Exercised, Shares (in shares)  
Exercised, weighted average exercise price (in dollars per share)  
Exercised, Weighted average remaining contractual terms (Year)  
Forfeited / Expired, Shares (in shares) (481,800) (635,700)  
Forfeited / Expired, weighted average exercise price (in dollars per share) $ 1.34 $ 1.57  
Forfeited / Expired, Weighted average remaining contractual term (Year)  
Outstanding, Shares (in shares) 1,478,700 1,104,500 1,592,200
Outstanding, weighted average exercise price (in dollars per share) $ 0.56 $ 1.41 $ 1.52
Exercisable, Shares (in shares) 524,450    
Exercisable, weighted average exercise price (in dollars per share) $ 0.81    
Exercisable, Weighted average remaining contractual terms (Year) 4 years 292 days    
Exercisable    
Expected to vest in the future, Shares (in shares) 671,805    
Expected to vest in the future, weighted average exercise price (in dollars per share) $ 0.42    
Expected to vest in the future, Weighted average remaining contractual terms (Year) 9 years 292 days    
Expected to vest in the future