Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 7,709,000	$ 4,554,000	[1]
Marketable securities	867,000	293,000	[1]
Accounts receivable, net of allowance for doubtful accounts of $112,000 and $74,000 as of September 30, 2013 and December 31, 2012, respectively	5,935,000	6,350,000	[1]
Inventories	13,641,000	17,164,000	[1]
Prepaid expenses	2,349,000	2,299,000	[1]
Deferred income tax assets	575,000	554,000	[1]
Total current assets	31,076,000	31,214,000	[1]
Property and equipment, net	3,186,000	3,419,000	[1]
Goodwill	55,000	55,000	[1]
Definite-lived intangible assets, net	97,000	113,000	[1]
Equity investments in and advances to unconsolidated affiliate	2,670,000	2,498,000	[1]
Total assets	37,084,000	37,299,000	[1]
Current liabilities:
Accounts payable	326,000	860,000	[1]
Accrued liabilities	905,000	793,000	[1]
Total current liabilities	1,231,000	1,653,000	[1]
Deferred income tax liabilities	1,035,000	813,000	[1]
Total liabilities	2,266,000	2,466,000	[1]
Shareholders' equity:
Common stock, $.01 par value: 50,000,000 shares authorized; 18,921,209 and 20,044,457 shares outstanding as of September 30, 2013and December 31, 2012, respectively	189,000	200,000	[1]
Additional paid-in capital	19,158,000	20,915,000	[1]
Accumulated other comprehensive income	382,000	24,000	[1]
Retained earnings	15,089,000	13,694,000	[1]
Total shareholders' equity	34,818,000	34,833,000	[1]
Total liabilities and shareholders' equity	$ 37,084,000	$ 37,299,000	[1]

[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.