CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 16,508	$ 11,803	$ 44,626
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,386	8,105	2,764
Stock-based compensation expense	4,100	2,924	2,910
Deferred tax assets, net	7,927	5,935	(29,231)
Other	247	339	411
Changes in operating assets and liabilities:
Accounts receivable	(11,058)	(11,401)	(4,728)
Inventories	(3,704)	(1,301)	(3,459)
Prepaid expenses and other assets	(2,076)	(594)	(887)
Accounts payable	3,504	7,522	2,348
Accrued liabilities	1,314	(1,449)	1,738
Deferred revenue	2,497	933	105
NET CASH PROVIDED BY OPERATING ACTIVITIES	28,645	22,816	16,597
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(16,304)	(9,018)
Proceeds from maturities of marketable securities	15,145
Capital expenditures	(7,437)	(2,133)	(1,852)
Acquisitions net of cash acquired		(52,954)	(1,000)
Collections on note receivable			462
Other	(55)	(71)	(8)
NET CASH USED IN INVESTING ACTIVITIES	(8,651)	(64,176)	(2,398)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from public sale of common stock			44,784
Net repayments of bank term loan		(1,800)	(1,200)
Payment of acquisition-related note and contingent consideration	(2,673)	(1,579)	(535)
Taxes paid related to net share settlement of vested equity awards	(3,088)	(3,057)	(2,560)
Proceeds from exercise of stock options and warrants	718	3,928	2,812
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES	(5,043)	(2,508)	43,301
Net change in cash and cash equivalents	14,951	(43,868)	57,500
Cash and cash equivalents at beginning of period	19,233	63,101	5,601
Cash and cash equivalents at end of period	$ 34,184	$ 19,233	$ 63,101