Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 15,000		$ 70,000
Adjustments to reconcile net income to net cash used in operating activities:
Share-based compensation expense	55,000		57,000
Depreciation and amortization	181,000		216,000
Equity in income of unconsolidated affiliate	(33,000)		(147,000)
Changes in assets and liabilities:
Accounts receivable, net	(1,147,000)		(1,706,000)
Inventories	865,000		708,000
Prepaid expenses	(217,000)		(1,017,000)
Accounts payable and accrued liabilities	(41,000)		351,000
Net cash used in operating activities	(322,000)		(1,468,000)
Cash Flows From Investing Activities:
Purchase of property and equipment	(71,000)		(366,000)
Purchase of intangible assets			(2,000)
Net cash used in investing activities	(71,000)		(368,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	42,000
Repurchase of common stock	(872,000)		(205,000)
Net cash used in financing activities	(830,000)		(205,000)
Net decrease in cash and cash equivalents	(1,223,000)		(2,041,000)
Cash and cash equivalents, beginning of the period	4,554,000	[1]	7,503,000
Cash and cash equivalents, end of the period	$ 3,331,000		$ 5,462,000

[1] The condensed consolidated balance sheet as of December 31, 2012 has been prepared using information from the audited consolidated balance sheet as of that date.