Stockholders' Equity Common Stock Table (Details) (USD $)	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2013
Class of Stock [Line Items]
Over-allotment options exercised during the fourth quarter of fiscal 2012, shares	120,000
Total common stock reserved for issuance, shares		4,428,000
Stock options outstanding [Member]
Class of Stock [Line Items]
Total common stock reserved for issuance, shares		844,000
Stock options and restricted stock available for grant [Member]
Class of Stock [Line Items]
Total common stock reserved for issuance, shares		1,111,000
Employee stock purchase plan shares available for purchase [Member]
Class of Stock [Line Items]
Total common stock reserved for issuance, shares		365,000
Common Stock [Member]
Class of Stock [Line Items]
Common stock issued under public offering, shares	920,000
Over-allotment options exercised during the fourth quarter of fiscal 2012, exercise price	$ 4.00