CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 19,155	$ 16,806	$ 13,779
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of discontinued operations, net of tax	0	0	(3,857)
Gain on sale of product line	0	(810)	(1,619)
Depreciation and amortization	12,593	13,572	14,478
Amortization of debt issuance costs	110	110	525
Deferred income taxes	969	(1,649)	1,182
Stock based compensation	1,763	1,401	1,288
Impairment and loss on disposition of property, plant and equipment	359	1,977	198
Accounts receivable	(4,101)	(150)	(4,088)
Inventories	(3,046)	2,728	(348)
Taxes Receivable	(640)	(355)	112
Prepaid expenses and other assets	161	620	(843)
Accounts payable	(59)	1,118	(3,892)
Accrued payroll and other compensation	(121)	1,152	573
Accrued taxes	96	(693)	(667)
Other liabilities, net	3,041	(1,422)	(2,164)
Net cash provided by operating activities	30,280	34,405	14,657
Cash flows from investing activities:
Net proceeds from divestiture	0	0	13,982
Redemption (purchase) of short-term investment	0	12,015	(12,000)
Capital expenditures	(13,826)	(11,404)	(8,884)
Proceeds from sale of a product line	0	1,000	0
Reimbursement of cash from leasing company	0	0	818
Increase in restricted cash	0	0	(225)
Acquisition earn out payments	(160)	0	0
Net cash (used for) provided by investing activities	(13,986)	1,611	(6,309)
Cash flows from financing activities:
Debt repayments	(34)	(285)	(255)
Capital lease payments	(734)	(771)	(1,294)
Common stock issued	1,497	972	128
Common stock repurchased	(6,617)	(3,998)	(200)
Excess tax benefit on stock awards	271	211	0
Net cash used for financing activities	(5,617)	(3,871)	(1,621)
Effect of exchange rate changes on cash	1,107	573	(810)
Increase in cash and cash equivalents	11,784	32,718	5,917
Cash and cash equivalents at beginning of period	63,623	30,905	24,988
Cash and cash equivalents at end of period	75,407	63,623	30,905
Cash paid during the year for:
Interest	214	255	351
Income taxes	$ 7,227	$ 5,347	$ 6,308