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Note 6 - Stockholders' Equity (Tables)
3 Months Ended
Jun. 27, 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]
 

June 27, 2014

March 31, 2014

 

PFG Warrants

2010 Warrants

PFG Warrants

2010 Warrants

Contractual term in years

3.6

1.4

3.9

1.7

Volatility

68.9%

73.3%

65.6%

69.5%

Expected dividend

--

--

--

--

Risk-free interest rate

1.12%

0.25%

1.25%

0.34%

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

Three months Ended June 27, 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

    (45,000 )     117,000  

Level 3 Warrants, end of period

  $ 364,000     $ 409,000