Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net income	$ 8,137	$ 12,604
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,630	2,102
Stock-based compensation	1,440	1,257
Fair value adjustment to contingent consideration obligations	79	42
Provision for doubtful accounts	219	146
Provision for inventory write-downs	402	170
Gain on divestitures		(5,876)
Foreign currency transaction loss	(63)	96
Changes in operating assets and liabilities:
Accounts receivable	(62)	(552)
Inventory and other deferred costs	(5,288)	(1,306)
Prepaid expenses and other assets	715	26
Accounts payable and other liabilities	(4,094)	(82)
Net cash provided by operating activities	4,115	8,627
Investing activities
Purchases of property and equipment and other assets	(1,651)	(1,230)
Purchases of short-term marketable securities	(13,175)	(10,757)
Proceeds from divestuture		7,400
Net cash used in investing activities	(14,826)	(4,587)
Financing activities
Payments of deferred acquisition consideration	(59)	(1,142)
Proceeds from issuance of common stock	1,008	738
Purchase of treasury stock	(23)	(5)
Common stock cash dividend paid	(3,344)	(2,704)
Net cash provided by financing activities	(2,418)	(3,113)
Effect of exchange rate changes on cash and cash equivalents	75	(385)
Net increase in cash and cash equivalents	(13,054)	542
Cash and cash equivalents at beginning of period	26,318	19,096
Cash and cash equivalents at end of period	$ 13,264	$ 19,638