Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Cash Flows From Operating Activities:
Net income	$ 269,000		$ 15,000
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation expense	8,000		55,000
Depreciation and amortization	188,000		181,000
Equity in income of unconsolidated affiliate	(110,000)		(33,000)
Gain on investment in common stock warrants	(30,000)
Changes in assets and liabilities:
Accounts receivable, net	(2,064,000)		(1,147,000)
Inventories	(342,000)		865,000
Prepaid expenses	(291,000)		(217,000)
Accounts payable and accrued liabilities	(295,000)		(41,000)
Net cash used in operating activities	(2,667,000)		(322,000)
Cash Flows From Investing Activities:
Purchase of property and equipment	(21,000)		(71,000)
Purchase of marketable securities	(134,000)
Net cash used in investing activities	(155,000)		(71,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	48,000		42,000
Repurchase of common stock	(577,000)		(872,000)
Net cash used in financing activities	(529,000)		(830,000)
Net decrease in cash and cash equivalents	(3,351,000)		(1,223,000)
Cash and cash equivalents, beginning of the period	8,215,000	[1]	4,554,000
Cash and cash equivalents, end of the period	$ 4,864,000		$ 3,331,000

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