CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Cash flows from operating activities:
Net Loss	$ (1,835)		$ (1,959)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	1,404		1,291
Amortization of marketable securities premium	122		146
Stock-based compensation	292		332
Loss (gain) on disposal of property, plant and equipment	(5)		0
Provision for doubtful accounts	1		0
Changes in assets and liabilities:
Accounts receivable, net	(1,459)		922
Inventories	985		1,649
Prepaid expenses and other current assets	1,584		(1,740)
Other assets	18		105
Accounts payable	(489)		664
Accrued liabilities	(697)	[1]	(164)	[1]
Other long-term liabilities	(308)		(270)
Net cash (used in) provided by operating activities	(387)		976
Cash flows from investing activities:
Purchases of property, plant and equipment	(163)		(1,349)
Proceeds from sales of property, plant and equipment	5		0
Purchases of available-for-sale securities	(3,725)		(12,410)
Proceeds from maturities of available-for-sale securities	2,180		8,130
Net cash used in investing activities	(1,703)		(5,629)
Cash flows from financing activities:
Proceeds from common stock options exercised	0		256
Dividends paid by joint ventures	0		(532)
Net cash used in financing activities	0		(276)
Effect of exchange rate changes on cash and cash equivalents	(111)		87
Net decrease in cash and cash equivalents	(2,201)		(4,842)
Cash and cash equivalents at the beginning of the period	24,961		30,634
Cash and cash equivalents at the end of the period	$ 22,760		$ 25,792

[1] Dividends accrued but not paid by joint ventures of $729 and $2,365 was included in accrued liabilities as of March 31, 2014 and March 31, 2013, respectively.