Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Cash Flows From Operating Activities:
Net income	$ 2,130,000		$ 1,395,000
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	25,000		141,000
Depreciation and amortization	562,000		534,000
Equity in income of unconsolidated affiliate	(216,000)		(172,000)
Gain on investment in common stock warrants	(30,000)
Gain on sale of marketable securities	(379,000)
Deferred income taxes	196,000		(14,000)
Changes in assets and liabilities:
Accounts receivable, net	(1,077,000)		415,000
Inventories	469,000		3,523,000
Prepaid expenses	(1,147,000)		(50,000)
Accounts payable and accrued liabilities	440,000		(423,000)
Net cash provided by operating activities	973,000		5,349,000
Cash Flows From Investing Activities:
Purchase of property and equipment	(892,000)		(284,000)
Purchase of intangible assets			(1,000)
Purchase of marketable securities	(134,000)
Proceeds from sale of marketable securities	440,000
Net cash used in investing activities	(586,000)		(285,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	450,000		514,000
Repurchase of common stock	(2,034,000)		(2,422,000)
Excess tax benefit (expense) on stock options exercised	35,000		(1,000)
Net cash used in financing activities	(1,549,000)		(1,909,000)
Net (decrease) increase in cash and cash equivalents	(1,162,000)		3,155,000
Cash and cash equivalents, beginning of the period	8,215,000	[1]	4,554,000
Cash and cash equivalents, end of the period	$ 7,053,000		$ 7,709,000

[1] The condensed consolidated balance sheet as of December 31, 2013 has been prepared using information from the audited consolidated balance sheet as of that date.