Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net loss	$ (30)	$ (1,456)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	734	792
Intangible asset amortization	290	769
Stock-based compensation	729	859
Restructuring costs	(33)	224
Deferred tax provision	(377)	(1,411)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	787	4,861
Inventories	1,790	149
Prepaid expenses and other assets	333	(137)
Accounts payable	(812)	(1,971)
Income taxes payable	(70)	2
Other accrued liabilities	(1,467)	(1,065)
Deferred revenue	(12)	10
Net cash provided by operating activities	1,862	1,626
Investing Activities:
Capital expenditures	(1,053)	(699)
Proceeds from disposal of property and equipment	0	1
Purchases of investments	(9,743)	(15,602)
Redemptions/maturities of short-term investments	10,197	16,899
Net cash (used in) provided by investing activities	(599)	599
Financing Activities:
Proceeds from issuance of common stock	330	350
Payments for repurchase of common stock	0	(4,095)
Payment of withholding tax on stock-based compensation	(614)	(186)
Principle payments on capital leases	(19)	(9)
Cash dividends	(865)	(870)
Net cash used in financing activities	(1,168)	(4,810)
Net increase (decrease) in cash and cash equivalents	95	(2,585)
Effect of exchange rate changes on cash	10	(19)
Cash and cash equivalents, beginning of year	14,855	7,055
Cash and Cash Equivalents, End of Period	$ 14,960	$ 4,451