Statements of Cash Flows Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net Income (Loss) Attributable to Parent	$ 393	$ 1,862
Amortization	707	506
Amortization of Financing Costs and Discounts	739	664
Depreciation	1,064	1,112
Foreign Currency Transaction Gain (Loss), before Tax	(331)	(418)
Share-based Compensation	957	974
Provision for doubtful accounts and inventory valuation	778	425
Decrease (Increase) in Accounts Receivable	4,215	2,184
Decrease (Increase) in Inventories	(8,102)	(3,148)
Decrease (Increase) in Prepaid Expense and Other Assets	(934)	(1,588)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	2,215	4,936
Increase (Decrease) in Other Current Liabilities	(2,895)	(1,441)
Increase (Decrease) in Other Noncurrent Liabilities	225	(40)
Net Cash Provided by (Used in) Operating Activities	(307)	6,864
Payments to Acquire Marketable Securities	34,877	31,832
Proceeds from Sale and Maturity of Marketable Securities	18,473	18,245
Payments to Acquire Property, Plant, and Equipment	2,528	505
Net Cash Provided by (Used in) Investing Activities	(18,932)	(14,092)
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	101	0
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	500	171
Net Cash Provided by (Used in) Financing Activities	601	171
Effect of Exchange Rate on Cash and Cash Equivalents	(562)	(612)
Cash and Cash Equivalents, Period Increase (Decrease)	(19,200)	(7,669)
Cash and Cash Equivalents, at Carrying Value	85,053	89,002
Income Taxes Paid	1,954	693
Interest Paid	$ 1,125	$ 1,063