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Note 6 - Stockholders' Equity (Tables)
9 Months Ended
Dec. 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]
   

December 26, 2014

   

March 31, 2014

 
   

PFG Warrants

   

2010 Warrants

   

PFG Warrants

   

2010 Warrants

 

Contractual term in years

    3.1       0.9       3.9       1.7  

Volatility

    67.4 %     55.2 %     65.6 %     69.5 %

Expected dividend

    --       --       --       --  

Risk-free interest rate

    1.21 %     0.23 %     1.25 %     0.34 %
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

Nine months Ended December 26, 2014

   

Year Ended

March 31, 2014

 

Level 3 Warrants, beginning of period

  $ 409,000     $ 292,000  

Change in fair value of warrant liability

    (231,000 )     117,000  

Level 3 Warrants, end of period

  $ 178,000     $ 409,000