Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Operating activities
Net income	$ 4,226	$ 5,221
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairment expense	8,545	8,467
Stock-based compensation expense	17,011	15,833
Excess tax benefits from equity compensation plans	0	(791)
Deferred income taxes	804	474
Other	(261)	(728)
Changes in operating assets and liabilities:
Accounts receivable, net	(318)	2,732
Inventories, net	(744)	(83)
Income taxes, net	8,122	3,598
Deferred costs	(4,738)	340
Other assets	(5,027)	(597)
Accounts payable	(3,043)	(6,679)
Accrued payroll and related benefits	(641)	1,126
Other liabilities	(481)	(762)
Deferred revenue	7,755	4,456
Net cash provided by operating activities	31,210	32,607
Investing activities
Purchases of marketable securities	(21,769)	(21,777)
Proceeds from the sale of marketable securities	12,250	10,294
Proceeds from the maturity of marketable securities	8,342	8,018
Purchases of non-marketable investments	(4,000)	(636)
Purchases of property and equipment	(7,816)	(2,969)
Purchases of intangible assets	0	(1,000)
Business combinations, net of cash acquired	(506)	(243)
Payments for the sale of net liabilities	(800)	0
Net cash used in investing activities	(14,299)	(8,313)
Financing activities
Proceeds from issuance of common stock	3,009	4,869
Taxes paid related to net share settlement of equity awards	(4,474)	(2,544)
Excess tax benefits from equity compensation plans	0	791
Employee loans extended, net of repayment	31	(2)
Repayment of note payable	(4,115)	(133)
Repurchases of common stock	(6,546)	(7,241)
Payments of acquisition-related liabilities	(743)	0
Net cash used in financing activities	(12,838)	(4,260)
Effect of exchange rate changes	1,335	463
Net increase in cash, cash equivalents and restricted cash	5,408	20,497
Cash, cash equivalents and restricted cash at beginning of period	120,837	119,333
Cash, cash equivalents and restricted cash at end of period	$ 126,245	$ 139,830