CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 6,651	$ 9,080
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	3,844	3,449
Non-cash interest expense	1,320
Stock-based compensation expense	3,341	2,668
Deferred tax expense	326	218
Loss on revaluation of contingent consideration	3,317	2,114
Gain on sale of fixed assets	(15)
Loss on disposal of fixed assets	25	1
Changes in assets and liabilities:
Accounts receivable	(3,270)	(2,756)
Other receivables	20	183
Inventories	(6,457)	(4,051)
Prepaid expenses and other current assets	820	699
Accounts payable	(1,918)	(749)
Accrued liabilities	(2,389)	1,085
Long-term liabilities	(48)	(240)
Net cash provided by operating activities	5,567	11,701
Cash flows from investing activities:
Acquisition of Atoll GmbH, net of cash received	(8,767)
Purchases of marketable securities	(21,394)	(14,090)
Redemptions of marketable securities	19,700	18,264
Proceeds from sale of fixed assets	45
Purchases of property, plant and equipment	(3,462)	(2,055)
Net cash (used in) provided by investing activities	(13,878)	2,119
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes, net of costs	111,070
Exercise of stock options	1,630	927
Payment of contingent considerations	(498)	(99)
Net cash provided by financing activities	112,202	828
Effect of exchange rate changes on cash and cash equivalents	(332)	(1,927)
Net increase in cash and cash equivalents	103,559	12,721
Cash and cash equivalents, beginning of period	54,092	35,363
Cash and cash equivalents, end of period	157,651	48,084
Supplemental disclosure of non-cash activities:
Income taxes paid	2,888	$ 2,671
Payment of contingent consideration in common stock	875
Stock tendered for acquisition of Atoll GmbH	$ 14,135