Stock-Based Compensation (Details) (2004 Stock Incentive Plan [Member], USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense
Allocated Share-based Compensation Expense	$ 1,871,000	$ 1,407,000	$ 1,201,000
Income tax expense	0	0	(61,000)
Total stock-based compensation expense after taxes	1,871,000	1,407,000	1,140,000
Cost of Revenue [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	53,000	27,000	55,000
Selling and Marketing Expense [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	337,000	190,000	173,000
Research and Development Expense [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	338,000	115,000	58,000
General and Administrative Expense [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	$ 1,143,000	$ 1,075,000	$ 915,000