CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]
Balances at Feb. 28, 2018	$ 198,916	$ 218,574	$ (19,459)	$ (199)
Equity component of 2025 Convertible Notes, net of tax		51,902
Purchase of capped call on 2025 Convertible Notes, net of tax		(15,870)
Debt issuance costs of 2025 Convertible Notes allocated to equity, net of tax		(1,649)
Equity component of the repurchased 2020 Convertible Notes		(6,088)
Unwind of note hedges and warrants of 2020 Convertible Notes		3,122
Stock-based compensation expense		8,088
Shares issued on net share settlement of equity awards		(3,520)
Exercise of stock options and contributions to ESPP		124
Repurchases of common stock		(39,000)
Cumulative adjustment upon adoption, net of tax \| ASU 2016-01 [Member]			434	(434)
Cumulative adjustment upon adoption, net of tax \| ASC 606 [Member]			(1,595)
Net income (loss)	7,135		7,135
Other comprehensive income (loss), net of tax				(12)
Balances at Nov. 30, 2018	201,553	215,683	(13,485)	(645)
Balances at Aug. 31, 2018	209,736	223,329	(12,963)	(630)
Stock-based compensation expense		2,941
Shares issued on net share settlement of equity awards		(174)
Exercise of stock options and contributions to ESPP		23
Repurchases of common stock		(10,436)
Net income (loss)	(522)		(522)
Other comprehensive income (loss), net of tax				(15)
Balances at Nov. 30, 2018	201,553	215,683	(13,485)	(645)
Balances at Feb. 28, 2019	205,653	208,541	(2,227)	(661)
Stock-based compensation expense		9,378
Shares issued on net share settlement of equity awards		(1,827)
Exercise of stock options and contributions to ESPP		1,048
Net income (loss)	(23,477)		(23,477)
Other comprehensive income (loss), net of tax				(122)
Balances at Nov. 30, 2019	190,653	217,140	(25,704)	(783)
Balances at Aug. 31, 2019	193,296	213,533	(18,289)	(1,948)
Stock-based compensation expense		3,652
Shares issued on net share settlement of equity awards		(98)
Exercise of stock options and contributions to ESPP		53
Net income (loss)	(7,415)		(7,415)
Other comprehensive income (loss), net of tax				1,165
Balances at Nov. 30, 2019	$ 190,653	$ 217,140	$ (25,704)	$ (783)

Adjustments to additional paid in capital purchase of capped call on convertible notes net of tax.

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Adjustments to additional paid in capital unwind of note hedges and warrants of convertible notes.

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Stock issued during period value stock options exercised and contributions to ESSP.

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Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.

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The amount of subsequent adjustments to additional paid in capital for convertible financial instruments where a component of equity and a component of debt are recognized.

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Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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