Income Tax (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Deferred tax assets:
Deferred revenue	$ 10,144	$ 11,483
Inventory valuation	46	224
Accrued compensation and benefits	5,219	3,898
Deferred compensation	1,941	1,615
State income taxes	0	17
Compensatory stock option expense	2,094	2,291
Allowance for doubtful accounts	6,791	7,182
Intangible assets	6,086	0
Research and development credit	2,434	2,003
Other	2,992	3,207
Total deferred tax assets	37,747	31,920
Deferred tax liabilities:
Accelerated depreciation	(1,582)	(1,876)
Capitalized software	(13,919)	(7,717)
Intangibles assets	0	(4,124)
Prepaid expense	(1,199)	(1,859)
State income taxes	(433)	0
Total deferred tax liabilities	(17,133)	(15,576)
Valuation allowance	(2,288)	(2,003)
Deferred tax assets (liabilities), net	$ 18,326	$ 14,341