CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 14,355		$ 8,662
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1,663		1,411
Amortization of marketable securities premium	187		47
Loss on disposal of property, plant and equipment	5		1
Stock-based compensation	422		233
Realized loss (gain) on sale of investments	8		(196)
Changes in assets and liabilities:
Accounts receivable, net	156		(3,306)
Inventories	(3,567)		350
Prepaid expenses and other current assets	(4,547)		(1,657)
Other assets	309		(22)
Accounts payable	(3,369)		(1,523)
Accrued liabilities	(99)		869
Other long-term liabilities	(613)		(12)
Net cash provided by operating activities	4,910		4,857
Cash flows from investing activities:
Purchases of property, plant and equipment	(5,977)		(1,187)
Proceeds from disposal of property, plant and equipment	0		4
Purchases of available for sale securities	(11,831)		(11,202)
Proceeds from available for sale securities	13,663		10,996
Investments in joint ventures	(2,649)		0
Net cash used in investing activities	(6,794)		(1,389)
Cash flows from financing activities:
Proceeds from common stock options exercised	533		166
Dividends paid by joint ventures	(1,636)		(192)
Long-term debt payments	0		(38)
Net cash used in financing activities	(1,103)		(64)
Effect of exchange rate changes on cash and cash equivalents	341		52
Net increase (decrease) in cash and cash equivalents	(2,646)		3,460
Cash and cash equivalents at the beginning of the period	23,724	[1]	16,934
Cash and cash equivalents at the end of the period	$ 21,078		$ 20,394

[1] The Condensed Consolidated Balance Sheet at December 31, 2010 has been derived from the audited consolidated financial statements at that date.