Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 9,940	$ 13,791
Marketable securities	11,697	10,640
Accounts receivable, less allowance for doubtful accounts of $890 at March 31, 2012 and $940 at December 31, 2011	10,334	11,909
Inventories	12,550	11,052
Income tax refunds receivable	187	196
Other current assets	1,367	1,238
Deferred tax assets, net	2,381	2,518
Total current assets	48,456	51,344
Marketable securities, long-term	9,737	6,106
Equipment and leasehold improvements, net	1,555	1,400
Intangible and other assets, net	214	230
Goodwill	569	569
Other assets	139	137
Deferred tax assets, net	3,106	3,130
Total assets	63,776	62,916
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	5,115	4,081
Advance customer payments	685	655
Accrued expenses	2,836	3,657
Total current liabilities	8,636	8,393
Deferred rent	388	327
Extended warranty liability	265	353
Deferred tax liability	34	34
Reserve for income taxes	844	840
Total liabilities	10,167	9,947
Commitments and contingencies
Stockholders' equity:
Preferred stock, no par value, 5,000,000 shares authorized, none outstanding
Common stock, no par value, 25,000,000 shares authorized, 6,933,116 shares issued and outstanding at March 31, 2012 and 6,933,029 shares issued and outstanding at December 31, 2011	31,046	30,965
Accumulated other comprehensive loss	(459)	(926)
Retained earnings	23,022	22,930
Total stockholders' equity	53,609	52,969
Total liabilities and stockholders' equity	$ 63,776	$ 62,916