Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Operating activities
Net income (loss)	$ 5,221	$ (6,071)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and impairment expense	8,467	4,469
Stock-based compensation expense	15,833	13,710
Excess tax benefits from equity compensation plans	(791)	(3,260)
Deferred income taxes	474	239
Other	(728)	670
Changes in operating assets and liabilities:
Accounts receivable, net	2,732	(2,143)
Inventories, net	(83)	(1,125)
Income taxes, net	3,598	4,019
Deferred costs	340	(2,284)
Other assets	(575)	(933)
Accounts payable	(6,679)	2,225
Accrued payroll and related benefits	1,126	2,298
Other liabilities	(762)	53
Deferred revenue	4,456	16,752
Net cash provided by operating activities	32,629	28,619
Investing activities
Purchases of marketable securities	(21,777)	(14,240)
Proceeds from the sale of marketable securities	10,294	7,177
Proceeds from the maturity of marketable securities	8,018	4,667
Purchases of non-marketable investments	(636)	(350)
Purchases of property and equipment	(2,969)	(3,443)
Purchases of intangible assets	(1,000)	0
Business combinations, net of cash acquired	(243)	(749)
Net cash used in investing activities	(8,313)	(6,938)
Financing activities
Proceeds from issuance of common stock	4,869	4,300
Taxes paid related to net share settlement of equity awards	(2,544)	(4,026)
Excess tax benefits from equity compensation plans	791	3,260
Employee loans extended, net of repayment	(2)	(2,484)
Repayment of note payable	(133)	(125)
Repurchases of common stock	(7,241)	0
Other	0	(181)
Net cash provided by (used in) financing activities	(4,260)	744
Effect of exchange rate changes on cash and cash equivalents	463	(115)
Net increase in cash and cash equivalents	20,519	22,310
Cash and cash equivalents at beginning of period	118,654	151,373
Cash and cash equivalents at end of period	$ 139,173	$ 173,683