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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
9 Months Ended
Nov. 30, 2018
Nov. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 7,135 $ 21,384
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation expense 6,602 5,953
Intangible assets amortization expense 8,534 11,278
Stock-based compensation expense 8,088 6,664
Tax benefits on vested and exercised equity awards 591 328
Amortization of convertible debt issue costs and discounts 7,999 5,551
Loss on extinguishment of debt 2,033  
Impairment loss on equity investment 326  
Unrealized foreign currency transaction losses 397 (404)
Deferred tax assets, net (716) 2,873
Equity in net loss of affiliate 1,414 1,122
Other (32) 59
Changes in operating assets and liabilities:    
Accounts receivable (1,005) (5,120)
Inventories 4,454 (9,449)
Prepaid expenses and other assets (5,222) (3,977)
Accounts payable (3,826) 12,035
Accrued liabilities 6,716 8,783
Deferred revenue 4,605 1,651
NET CASH PROVIDED BY OPERATING ACTIVITIES 48,093 58,731
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from maturities of marketable securities 36,461 11,273
Purchases of marketable securities (43,103) (17,209)
Capital expenditures (8,884) (5,970)
Advances to equity method investee (1,519) (1,312)
Other (103) (152)
NET CASH USED IN INVESTING ACTIVITIES (17,148) (13,370)
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 (39,000)  
Taxes paid related to net share settlement of vested equity awards (3,520) (2,452)
Proceeds from exercise of stock options 124 145
NET CASH PROVIDED BY (USED) IN FINANCING ACTIVITIES 108,578 (2,307)
EFFECT OF EXCHANGE RATE CHANGES ON CASH (513) 1,335
Net change in cash and cash equivalents 139,010 44,389
Cash and cash equivalents at beginning of period 132,603 93,706
Cash and cash equivalents at end of period $ 271,613 $ 138,095