CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss		$ (67)	$ (899)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		1,178	1,403
Amortization of marketable securities premium		38	55
Stock-based compensation		253	274
Provision for doubtful accounts			150
Realized gain on sale of investments		(181)	(367)
Loss on disposal of equipment			9
Loss (gain) from equity investments, net		456	(200)
Changes in operating assets and liabilities:
Accounts receivable		(1,223)	(1,052)
Inventories		(756)	(858)
Prepaid expenses and other current assets		(281)	1,124
Other assets		114	(75)
Accounts payable		1,557	1,979
Accrued liabilities	[1]	(1,051)	(1,906)
Other long-term liabilities		(148)	(110)
Net cash used in operating activities		(111)	(473)
Cash flows from investing activities:
Purchases of equipment		(795)	(676)
Proceeds from sale of equipment			2
Purchases of available for sale securities		(4,138)	(4,304)
Proceeds from sales and maturities of available-for-sale securities		5,170	10,277
Investments in non-marketable equity investments			(162)
Dividends received from equity method investments			286
Net cash provided by investing activities		237	5,423
Cash flows from financing activities:
Proceeds from common stock options exercised			76
Repurchases of the Company's common stock, including commission			(617)
Dividends paid by joint ventures to their minority share holders		(39)
Net cash used in financing activities		(39)	(541)
Effect of exchange rate changes on cash and cash equivalents		105	62
Net increase in cash and cash equivalents		192	4,471
Cash and cash equivalents at the beginning of the period		24,875	28,814
Cash and cash equivalents at the end of the period		$ 25,067	$ 33,285

[1] * Dividend accrued but not paid by joint ventures of $552 and $646 was included in accrued liabilities as of March 31, 2016 and March 31, 2015, respectively.