Commitments

6 Months Ended

Sep. 30, 2011

Commitments [Abstract]

COMMITMENTS

NOTE F — COMMITMENTS

Operating Leases and Purchase Commitments

The Company leases vehicles and equipment under operating leases. Rent expense under operating leases was $0.4 million and $0.5 million for the three months ended September 30, 2010 and 2011; and $0.8 million and $1.0 million for the six months ended September 30, 2010 and 2011. The Company enters into non-cancellable purchase commitments for certain inventory items in order to secure better pricing and ensure materials on hand, as well as for capital expenditures. As of September 30, 2011, the Company had entered into $10.1 million of purchase commitments related to fiscal 2012, including $1.7 million for operating lease commitments and $8.4 million for inventory purchase commitments.