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Fair Value Measurements
9 Months Ended
Dec. 31, 2014
Fair Value Measurements [Abstract]  
Fair Value Measurements
3. Fair Value Measurements

Estimates of fair value for financial assets and liabilities are based on the framework established in the accounting guidance for fair value measurements.  The framework defines fair value, provides guidance for measuring fair value and requires certain disclosures.  The framework prioritizes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.  The following three broad levels of inputs may be used to measure fair value under the fair value hierarchy:
 
·Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.
·Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly.  These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.
·Level 3: Significant unobservable inputs that cannot be corroborated by observable market data and reflect the use of significant management judgment.  These values are generally determined using pricing models for which the assumptions utilize management's estimates of market participant assumptions.
If the inputs used to measure the financial assets and liabilities fall within more than one of the different levels described above, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument.

The following table provides the assets carried at fair value measured on a recurring basis.

Asset Class
 
Fair Value
  
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
  
Significant
Other
Observable
Inputs
(Level 2)
  
Significant
Unobservable
Inputs
(Level 3)
 
         
December 31, 2014
        
Short-term investments:
        
U.S. Government and Agency debt securities
 
$
-
  
$
-
  
$
-
  
$
-
 
                 
March 31, 2014
                
Short-term investments:
                
U.S. Government and Agency debt securities
  
3,451,000
   
-
   
3,451,000
   
-
 

U.S. Government and U.S. Government Agency debt securities.  Our debt securities consist of bonds, notes and treasury bills with risk ratings of AAA/Aaa and maturity dates within two years from date of purchase.  The estimated fair value of these securities is based on valuations provided by external investment managers.

The carrying amounts reported in the Condensed Consolidated Balance Sheets for cash and cash equivalents, accounts receivable, inventories, other current assets, accounts payable and accrued liabilities approximate fair market value.