Note 2 - Summary of Significant Accounting Policies
 3 Months Ended
Jun. 30, 2012
Significant Accounting Policies [Text Block]
2.  Summary of Significant Accounting Policies

There have been no material changes to any of the Company’s significant accounting policies and estimates as disclosed in the Company’s Annual Report on Form 10-K for the year ended March 31, 2012.

Customer Concentrations

A limited number of customers have historically accounted for a substantial portion of the Company’s revenues.

Customers who accounted for at least 10% of total revenues were as follows:

   
Three Months Ended
June 30,
 
   
2012
   
2011
 
Customer A
   
14
%
   
15
%

Customers who accounted for at least 10% of gross accounts receivable were as follows:

   
June 30,
2012
   
March 31,
2012
 
Customer A
   
16
%
   
22
%
Customer B
   
*
     
11
%
Customer C
   
12
%
   
*
 
Customer D
   
18
%
   
*
 

*
Less than 10% of total accounts receivable.

Fair Value Measurements

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of June 30, 2012 (in thousands):

Description
 
Balance as of
June 30, 2012
   
Quoted
Prices in
Active
Markets for
Identical Assets
(Level 1)
   
Significant
Other
Observable
Inputs
(Level 2)
 
Cash equivalents:
                 
Money market fund
 
$
4
   
$
4
   
$
—
 
Certificates of deposit
   
199
     
—
     
199
 
                         
Total
 
$
203
   
$
4
   
$
199
 

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of March 31, 2012 (in thousands):

Description
 
Balance as of
March 31, 2012
   
Quoted
Prices in
Active
Markets for
Identical Assets
(Level 1)
   
Significant
Other
Observable
Inputs
(Level 2)
 
Cash equivalents:
                 
Money market fund
 
$
4
   
$
4
   
$
—
 
Short-term investments:
                       
Certificates of deposit
   
199
     
—
     
199
 
                         
Total
 
$
203
   
$
4
   
$
199
 

The Company’s financial assets and liabilities are valued using market prices on both active markets (Level 1) and less active markets (Level 2). Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets. Level 2 instrument valuations are obtained from readily-available pricing sources for comparable instruments. As of June 30, 2012 and March 31, 2012, the Company did not have any assets or liabilities without observable market values that would require a high level of judgment to determine fair value (Level 3).

Segment Information

The Company operates as one business segment and therefore segment information is not presented.