Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Deferred tax assets:
Accrued liabilities	$ 6,824	$ 4,433
Allowance for doubtful accounts	273	180
Inventory valuation reserve	330	437
Restructuring reserve	206	1,228
Federal losses and credit carryforwards	59,289	54,047
Foreign net operating losses	331	332
State losses and credit carryforwards	9,947	12,149
Deferred compensation	73	2,908
Deferred revenue	0	19
Goodwill and other intangible assets	4,463	6,090
Other	1,036	130
Deferred tax assets, gross	82,772	81,953
Less: valuation allowance	(79,165)	(78,682)
Total	3,607	3,271
Deferred tax liabilities:
Property and equipment & software amortization	3,627	3,261
Indefinite-lived goodwill & intangible assets	3,844	4,043
Total	7,471	7,304
Total deferred tax liabilities	$ (3,864)	$ (4,033)