Quarterly report pursuant to sections 13 or 15(d)

Accounts Receivable (Detail)

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Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Billed $ 1,095 $ 709
Unbilled 1,092 589
Less: allowance for doubtful accounts (108) (108)
Net Accounts receivable $ 2,079 $ 1,190