Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 10,863	$ 13,791
Marketable securities	10,859	10,640
Accounts receivable, less allowance for doubtful accounts of $860 at June 30, 2012 and $940 at December 31, 2011	8,627	11,909
Inventories	12,249	11,052
Income tax refunds receivable	539	196
Other current assets	1,433	1,238
Deferred tax assets, net	2,372	2,518
Total current assets	46,942	51,344
Marketable securities, long-term	10,566	6,106
Equipment and leasehold improvements, net	1,520	1,400
Intangible and other assets, net	227	230
Goodwill	569	569
Other assets	138	137
Deferred tax assets, net	3,045	3,130
Total assets	63,007	62,916
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	4,740	4,081
Advance customer payments	590	655
Accrued expenses	2,385	3,657
Total current liabilities	7,715	8,393
Deferred rent	462	327
Deferred warranty revenue	197	353
Deferred tax liability	34	34
Reserve for income taxes	820	840
Total liabilities	9,228	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, 6,938,116 shares issued and outstanding at June 30, 2012 and 6,933,029 shares issued and outstanding at December 31, 2011	31,131	30,965
Accumulated other comprehensive loss	(517)	(926)
Retained earnings	23,165	22,930
Total stockholders' equity	53,779	52,969
Total liabilities and stockholders' equity	$ 63,007	$ 62,916