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Fair Value Of Financial Instruments (Tables)
3 Months Ended
Jul. 31, 2012
Fair Value Of Financial Instruments [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

 

 

 

 

 

 

 

 

 

 

 

Fair value

 

Fair value measurement using

 

 

July 31, 2012

 

Level 1

 

Level 2

 

Level 3

 

 

 

 

 

 

 

 

 

Common stock warrant liability

$

 109

$

 -

$

 -

$

 109

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

 

 

 

 

 

(in thousands)

 

 

Common stock warrants

Balance at April 30, 2012

 

$

 

 569

Issuance of common stock warrants

 

 

 

 -

Change in fair value of common stock warrant liability

 

 

 

 (460)

Balance at July 31, 2012

 

$

 

 109