Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Cash Flows From Operating Activities:
Net income (loss)	$ 70,000		$ (112,000)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Share-based compensation expense	57,000		75,000
Depreciation and amortization	216,000		243,000
Gain on sale of assets			(41,000)
Equity in income of unconsolidated affiliate	(147,000)		(127,000)
Changes in assets and liabilities:
Accounts receivable, net	(1,706,000)		(2,176,000)
Inventories	708,000		872,000
Prepaid expenses	(1,017,000)		(1,387,000)
Accounts payable and accrued liabilities	351,000		(51,000)
Net cash used in operating activities	(1,468,000)		(2,704,000)
Cash Flows From Investing Activities:
Purchase of property and equipment	(366,000)		(45,000)
Purchase of intangible assets	(2,000)		(1,000)
Proceeds from sale of assets			235,000
Net cash (used in) provided by investing activities	(368,000)		189,000
Cash Flows From Financing Activities:
Repurchase of common stock	(205,000)
Proceeds from the exercise of stock options			16,000
Net cash (used in) provided by financing activities	(205,000)		16,000
Increase (decrease) in cash and cash equivalents	(2,041,000)		(2,499,000)
Cash and cash equivalents, beginning of the period	7,503,000	[1]	5,316,000
Cash and cash equivalents, end of the period	$ 5,462,000		$ 2,817,000

[1] The condensed consolidated balance sheet as of December 31, 2011 has been prepared using information from the audited balance sheet as of that date.