Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
OPERATIONS:
Net income (loss)	$ (929)	$ 698
Adjustments to reconcile net income (loss) to cash provided by (used for) operating activities:
Depreciation and amortization	304	343
Stock-based compensation expense	45	61
Non-cash investment and interest income, net	(125)	(1)
Equity in income of affiliate company	(2)	(5)
Changes in operating assets and liabilities:
Accounts receivable	224	(135)
Inventories, net	125	(30)
Other assets, net	(3)	(192)
Accounts payable	(31)	131
Accrued payroll	(59)	(103)
Deferred revenue, current portion	(48)	(257)
Accrued expenses	36	(61)
Accrued settlement	(24)
Other current liabilities	(42)	(43)
Other long-term liabilities	(59)	236
Net cash provided by (used for) operating activities	(588)	642
INVESTING ACTIVITIES:
Purchase of marketable securities	(132)	(67)
Proceeds from note and interest receivable		250
Purchases of property and equipment	(216)	(339)
Proceeds from sale of long-term investment	169
Net cash used for investing activities	(179)	(156)
Effects of exchange rate changes on cash	4	6
Net increase (decrease) in cash	(763)	492
Cash at beginning of period	3,433	2,347
Cash at end of period	2,670	2,839
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for income taxes	65	54
NON-CASH TRANSACTION:
Transfer of property and equipment to inventory		$ 147