XML 22 R6.htm IDEA: XBRL DOCUMENT v3.6.0.2
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities:      
Net income $ 32,547 $ 30,758 $ 38,319
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 3,734 3,775 4,706
Stock-based compensation expense 3,392 2,225 1,607
Deferred income taxes (65) (747) 815
Provision for doubtful accounts 52 38
Provision for inventory 654 210 378
Non-cash impairment charges for IPR&D 697
Tax benefit from equity awards (647) (847) (9,626)
Changes in operating assets and liabilities:      
Accounts receivable (6,201) (4,996) 898
Inventories (1,738) (2,939) (1,974)
Prepaid expenses, other current and long-term assets (898) 89 585
Accounts payable (5,059) 5,625 (750)
Accrued expenses and other current liabilities 1,566 (199) (1,189)
Deferred revenue (50) (15) (2,014)
Income taxes payable (3,552) 5,484 8,436
Other long-term liabilities 66 (94) (213)
Net cash provided by operating activities 23,801 39,064 39,978
Cash flows from investing activities:      
Proceeds from maturity of investments 46,500 24,250 20,000
Purchase of investments (39,249) (45,251) (26,750)
Purchase of property and equipment, net (14,014) (9,225) (1,553)
Net cash used in investing activities (6,763) (30,226) (8,303)
Cash flows from financing activities:      
Repurchase of common stock (25,000)
Proceeds from Stock Options Exercised 1,007 1,074 2,055
Tax benefit from equity awards 647 847 9,626
Minimum tax withholdings on share-based awards (6,349)
Net cash (used in) provided by financing activities (23,346) 1,921 5,332
Exchange rate impact on cash (138) (208) (184)
Increase (Decrease) in cash and cash equivalents (6,446) 10,551 36,823
Cash and cash equivalents at beginning of period 110,707 100,156 63,333
Cash and cash equivalents at end of period 104,261 110,707 100,156
Supplemental disclosure of cash flow information:      
Cash paid for income taxes 22,826 12,724 13,778
Non-cash Investing Activities:      
Purchases of property and equipment included in accounts payable and accrued expenses 1,257 1,949 52
Build-to-suit lease agreement $ 1,723 $ 30