Statements of Cash Flows Statement (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net Income (Loss) Attributable to Parent	$ 1,152	$ 8,208
Amortization	1,444	1,012
Amortization of Financing Costs and Discounts	1,482	1,332
Depreciation	2,067	1,986
Foreign Currency Transaction Gain (Loss), before Tax	(49)	(105)
Share-based Compensation	1,955	2,018
Provision for doubtful accounts and inventory valuation	1,673	949
Decrease (Increase) in Accounts Receivable	(4,376)	(11,777)
Decrease (Increase) in Inventories	(10,815)	(5,056)
Decrease (Increase) in Prepaid Expense and Other Assets	(1,165)	(2,334)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	3,387	7,089
Increase (Decrease) in Other Current Liabilities	(3,081)	6,337
Increase (Decrease) in Other Noncurrent Liabilities	238	25
Net Cash Provided by (Used in) Operating Activities	(6,088)	9,684
Payments to Acquire Marketable Securities	(61,414)	(51,648)
Proceeds from Sale and Maturity of Marketable Securities	35,440	43,774
Payments to Acquire Property, Plant, and Equipment	(2,485)	(909)
Cash Acquired from Acquisition	(3,365)	(7,640)
Net Cash Provided by (Used in) Investing Activities	(31,824)	(16,423)
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	630	101
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	611	171
Net Cash Provided by (Used in) Financing Activities	1,241	272
Effect of Exchange Rate on Cash and Cash Equivalents	(790)	(184)
Cash and Cash Equivalents, Period Increase (Decrease)	(37,461)	(6,651)
Cash and Cash Equivalents, at Carrying Value	66,792	90,020
Income Taxes Paid	3,923	1,079
Interest Paid	$ 1,125	$ 1,063