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Fair Value Of Financial Instruments
6 Months Ended
Oct. 31, 2014
Fair Value Of Financial Instruments [Abstract]  
Fair Value of Financial Instruments

5.Fair Value of Financial Instruments     

 

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date.

 

In determining fair value, we use various valuation approaches and establish a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available.  Observable inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company.  Unobservable inputs are inputs that reflect our assumptions about the assumptions that market participants would use in pricing the asset or liability developed based on the best information available in the circumstances.  The hierarchy is broken down into three levels based on the observability of inputs as follows:

 

·

Level 1 – Quoted prices in active markets for identical assets and liabilities.

·

Level 2 – Observable inputs other than those included in Level 1, such as quoted market prices for similar assets and liabilities in active markets or quoted prices for identical assets in inactive markets.

·

Level 3 – Unobservable inputs are used when little or no market data is available and reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability.

 

We value our common stock warrant liability on a recurring basis based on open form option pricing models which, based on the relevant inputs, render the fair value estimate Level 3.  Changes in the fair value of the warrants are reflected in the consolidated statements of operations as “Gain (loss) from change in fair value of common stock warrant.”

Fair Value on a Recurring Basis  

    

The following table summarizes the activity of Level 3 inputs measured on a recurring basis for the six months ended October 31, 2014:   

 

 

 

 

 

 

 

(in thousands)

 

 

Common stock warrants

Balance at April 30, 2014

 

$

 

276 

Change in fair value of common stock warrant liability

 

 

 

(61)

Balance at October 31, 2014

 

$

 

215