Annual report pursuant to Section 13 and 15(d)

Deferred Revenue (Details)

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Deferred Revenue (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
FPP agreements
Changes in deferred revenue      
FPP Balance, beginning of the period $ 3,089 $ 2,995 $ 1,167
FPP Billings     5,884
FPP Revenue recognized     (5,639)
Balance attributed to FPP contracts     1,412
Deposits     1,677
Deferred revenue balance, end of the period $ 3,089 $ 2,995 $ 3,089