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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2018
Aug. 31, 2018
Aug. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ (854) $ 7,657 $ 9,579
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation expense 2,298 4,341 3,983
Intangible assets amortization expense 2,893 5,641 7,568
Stock-based compensation expense 2,680 5,147 4,044
Tax benefits on vested and exercised equity awards   525 241
Amortization of convertible debt issue costs and discounts   4,537 3,679
Loss on extinguishment of debt 2,033 2,033  
Impairment loss on equity investment   326  
Unrealized foreign currency transaction losses   187 (385)
Deferred tax assets, net   (211) 669
Equity in net loss of affiliate 530 969 713
Other   (72) 55
Changes in operating assets and liabilities:      
Accounts receivable   505 516
Inventories   4,878 (1,440)
Prepaid expenses and other assets   (4,879) (3,034)
Accounts payable   743 4,335
Accrued liabilities   139 4,648
Deferred revenue   4,367 838
NET CASH PROVIDED BY OPERATING ACTIVITIES   36,833 36,009
CASH FLOWS FROM INVESTING ACTIVITIES:      
Proceeds from maturities of marketable securities   32,792 7,268
Purchases of marketable securities   (40,312) (4,548)
Capital expenditures   (5,770) (3,713)
Advances to equity method investee   (1,063) (650)
Other   (78) (135)
NET CASH USED IN INVESTING ACTIVITIES   (14,431) (1,778)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Proceeds from issuance of 2025 Convertible Notes   230,000  
Payment of debt issuance costs of 2025 Convertible Notes   (7,305)  
Purchase of capped call on 2025 Convertible Notes   (21,160)  
Repurchase of 2020 Convertible Notes   (53,683)  
Proceeds from unwind of note hedges and warrants on 2020 Convertible Notes   3,122  
Repurchases of common stock   (28,564)  
Taxes paid related to net share settlement of vested equity awards   (3,347) (2,335)
Proceeds from exercise of stock options   101 128
NET CASH PROVIDED BY (USED) IN FINANCING ACTIVITIES   119,164 (2,207)
EFFECT OF EXCHANGE RATE CHANGES ON CASH   (197) 906
Net change in cash and cash equivalents   141,369 32,930
Cash and cash equivalents at beginning of period   132,603 93,706
Cash and cash equivalents at end of period $ 273,972 $ 273,972 $ 126,636