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Deferred Rent and Leasehold Improvements	6 Months Ended
Deferred Rent and Leasehold Improvements	Sep. 30, 2011
Deferred Rent and Leasehold Improvements [Abstract]
Deferred Rent and Leasehold Improvements	7. Deferred Rent and Leasehold Improvements We entered into an 8-year operating lease agreement, effective May 2006, for our corporate facility in Minnesota. As part of the agreement, the landlord provided an incentive of $280,000 for leasehold improvements. We recorded this incentive as deferred rent and are amortizing it as a reduction in lease expense over the lease term. We are amortizing the leasehold improvements over the shorter of the asset life or the lease term.