Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 9,382	$ 13,791
Marketable securities	12,086	10,640
Accounts receivable, less allowance for doubtful accounts of $845 at September 30, 2012 and $940 at December 31, 2011	9,061	11,909
Inventories	12,269	11,052
Income tax refunds receivable	381	196
Other current assets	1,622	1,238
Deferred tax assets, net	2,270	2,518
Total current assets	47,071	51,344
Marketable securities, long-term	9,738	6,106
Equipment and leasehold improvements, net	1,771	1,400
Intangible and other assets, net	208	230
Goodwill	569	569
Other assets	142	137
Deferred tax assets, net	3,014	3,130
Total assets	62,513	62,916
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	4,283	4,081
Advance customer payments	595	655
Accrued expenses	2,344	3,657
Total current liabilities	7,222	8,393
Deferred rent	435	327
Deferred warranty revenue	189	353
Deferred tax liability	34	34
Reserve for income taxes	773	840
Total liabilities	8,653	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, 6,957,875 shares issued and outstanding at September 30, 2012 and 6,933,029 shares issued and outstanding at December 31, 2011	31,324	30,965
Accumulated other comprehensive loss	(182)	(926)
Retained earnings	22,718	22,930
Total stockholders' equity	53,860	52,969
Total liabilities and stockholders' equity	$ 62,513	$ 62,916