Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities
Net income	$ 2,456	$ 1,873
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1,974	1,633
Stock-based compensation	967	936
Provision for losses in accounts receivable	(51)	140
Provision for inventory write-downs	415	947
Loss on divestitures		2
Loss on disposal of property and equipment	37
Provision for deferred income taxes	13
Foreign currency transaction loss	83	286
Changes in operating assets and liabilities:
Accounts receivable	63	(101)
Inventory	(1,943)	(3,078)
Prepaid expenses and other assets	(255)	63
Accounts payable and other liabilities	273	1,594
Net cash provided by operating activities	4,032	4,295
Investing activities
Purchases of property and equipment	(2,438)	(788)
Payments related to acquisitions	(3,291)	(19)
Receipts related to divestitures		250
Purchase of intellectual property	(141)	(110)
Net cash used in investing activities	(5,870)	(667)
Financing activities
Proceeds from issuance of common stock	699	29
Purchase of treasury stock	(334)	(1,985)
Common stock cash dividend paid	(1,374)	(1,140)
Net cash used in financing activities	(1,009)	(3,096)
Effect of exchange rate changes on cash and cash equivalents	25	(25)
Net increase (decrease) in cash and cash equivalents	(2,822)	507
Cash and cash equivalents at beginning of period	16,448	20,132
Cash and cash equivalents at end of period	$ 13,626	$ 20,639