Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014
Cash Flows From Operating Activities:
Net income	$ 741,000		$ 2,130,000
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	18,000		25,000
Depreciation and amortization	527,000		562,000
Equity in income of unconsolidated affiliate	$ (50,000)		(216,000)
Gain on investment in common stock warrants			(30,000)
Gain on sale of marketable securities			(379,000)
Deferred income taxes			196,000
Changes in assets and liabilities:
Accounts receivable, net	$ 208,000		$ (1,077,000)
Accounts receivable, related party	249,000
Inventories	(1,317,000)		$ 469,000
Prepaid expenses and other current assets	1,761,000		(1,147,000)
Accounts payable and accrued liabilities	(80,000)		440,000
Net cash provided by operating activities	2,057,000		973,000
Cash Flows From Investing Activities:
Purchase of property and equipment	(189,000)		(892,000)
Purchase of marketable securities	(36,000)		(134,000)
Proceeds from sale of marketable securities	0		440,000
Net cash used in investing activities	(225,000)		(586,000)
Cash Flows From Financing Activities:
Repurchase of common stock	$ (1,518,000)		(2,034,000)
Excess tax benefit (expense) on stock options exercised			35,000
Proceeds from exercise of stock options	$ 765,000		450,000
Net cash used in financing activities	(753,000)		(1,549,000)
Increase(decrease) in cash	1,079,000		(1,162,000)
Cash, beginning of the period	5,495,000	[1]	8,215,000
Cash, end of the period	$ 6,574,000		$ 7,053,000

[1] The condensed consolidated balance sheet as of December 31, 2014 has been prepared using information from the audited consolidated balance sheet as of that date.