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Note 6 - Stockholders' Equity (Tables)
6 Months Ended
Sep. 26, 2014
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   

Shares (000’s)

   

Exercise Price

 

2010 Warrants

    267     $ 1.242  

PFG Warrants

    995     $ 0.500  

PFG Warrants

    200     $ 1.000  

Total

    1,462          
Fair Value, Option, Quantitative Disclosures [Table Text Block]
   

September 26, 2014

   

March 31, 2014

 
   

PFG Warrants

   

2010 Warrants

   

PFG Warrants

   

2010 Warrants

 

Contractual term in years

    3.4       1.2       3.9       1.7  

Volatility

    66.7%       54.7%       65.6%       69.5%  

Expected dividend

    --       --       --       --  

Risk-free interest rate

    1.02%       0.19%       1.25%       0.34%  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

Six months Ended

September 26, 2014

   

Year Ended

March 31, 2014

 

Level 3 Warrants, beginning of period

    $409,000       $292,000  

Addition – PFG Warrants, initial fair value

    --       --  

Change in fair value of warrant liability

    (91,000)       117,000  

Level 3 Warrants, end of period

    $318,000       $409,000