CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income (loss)	$ 25,823	$ 20,376	$ (1,505)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization	3,410	2,916	3,058
Amortization (accretion) of marketable securities premium/discount	368	316	(12)
Stock-based compensation	896	655	766
Realized loss (gain) on sale of investments	8	(346)	164
Restructuring charge	0	0	507
(Gain) loss on disposal of property, plant and equipment	6	5	(237)
Changes in assets and liabilities:
Accounts receivable, net	5,165	(7,726)	(3,880)
Inventories	(9,839)	(8,288)	7,352
Prepaid expenses and other current assets	(3,313)	(1,684)	717
Other assets	426	(5,689)	(769)
Accounts payable	(3,840)	1,530	(1,079)
Accrued liabilities	(197)	3,187	(390)
Other long-term liabilities	(781)	5,757	(27)
Net cash provided by operating activities	18,132	11,009	4,665
Cash flows from investing activities:
Purchases of property, plant and equipment	(13,102)	(6,386)	(1,963)
Proceeds from disposal of property, plant and equipment	33	10	430
Purchases of available for sale securities	(13,951)	(18,982)	(3,012)
Proceeds from available for sale securities	16,179	20,086	3,897
Investments in joint ventures	(3,024)	0	0
Loans to related parties	(1,565)	0	0
Decrease in restricted deposits	0	0	3,013
Net cash provided by (used in) investing activities	(15,430)	(5,272)	2,365
Cash flows from financing activities:
Proceeds from common stock options exercised	637	1,497	351
Dividends paid by joint ventures	(1,636)	(527)	(957)
Payment on line of credit	0	0	(3,013)
Long-term debt payments	0	(496)	(73)
Net cash provided by (used in) financing activities	(999)	474	(3,692)
Effect of exchange rate changes on cash and cash equivalents	729	579	30
Net increase in cash and cash equivalents	2,432	6,790	3,368
Cash and cash equivalents at the beginning of the year	23,724	16,934	13,566
Cash and cash equivalents at the end of the year	26,156	23,724	16,934
Supplemental disclosures:
Interest paid	0	14	72
Income taxes paid	$ 3,234	$ 1,979	$ 887