Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities:
Net income	$ 977,000	$ 933,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Share-based compensation expense	228,000	268,000
Depreciation and amortization	764,000	818,000
Equity in income of unconsolidated affiliate	(480,000)	(494,000)
Deferred income taxes	(6,000)	55,000
Gain on sale of assets		(41,000)
Changes in assets and liabilities:
Accounts receivable, net	(1,625,000)	(909,000)
Inventories	(1,598,000)	1,571,000
Prepaid expenses	(56,000)	1,476,000
Accounts payable and accrued liabilities	782,000	89,000
Net cash (used in) provided by operating activities	(1,014,000)	3,766,000
Cash Flows From Investing Activities:
Purchase of property and equipment	(519,000)	(269,000)
Purchase of intangible assets	(6,000)	(8,000)
Repayment of advances by unconsolidated affilitate	417,000
Purchase of marketable securities	(255,000)
Proceeds from sale of assets		235,000
Net cash used in investing activities	(363,000)	(42,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	9,000	16,000
Repurchase of common stock	(1,581,000)	(1,553,000)
Net cash used in financing activities	(1,572,000)	(1,537,000)
Changes in cash and cash equivalents	(2,949,000)	2,187,000
Cash and cash equivalents, beginning of the year	7,503,000	5,316,000
Cash and cash equivalents, end of the year	4,554,000	7,503,000
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 310,000	$ 609,000