Stock-Based Compensation (Details) (2004 Stock Incentive Plan [Member], USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Stock-based compensation expense
Allocated Share-based Compensation Expense	$ 2,605,000	$ 1,871,000	$ 1,407,000
Income tax expense	0	0
Total stock-based compensation expense after taxes	2,605,000	1,871,000	1,407,000
Cost of Revenue [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	89,000	53,000	27,000
Selling and Marketing Expense [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	170,000	337,000	190,000
Research and Development Expense [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	452,000	338,000	115,000
General and Administrative Expense [Member]
Stock-based compensation expense
Allocated Share-based Compensation Expense	$ 1,894,000	$ 1,143,000	$ 1,075,000