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Certain Financial Statement Information (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Schedule of Accounts receivable    
Accounts receivable $ 29,278 $ 25,278
Less: allowance for bad debts (463) (703)
Accounts receivable, net $ 28,815 $ 24,575 [1]
[1] Amounts have been derived from the March 31, 2013 audited consolidated financial statements.