Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 7,340	$ 13,791
Marketable securities	11,438	10,640
Accounts receivable, less allowance for doubtful accounts of $775 at December 31, 2012 and $940 at December 31, 2011	6,129	11,909
Inventories	12,533	11,052
Income tax refunds receivable	1,325	196
Other current assets	1,338	1,238
Deferred tax assets	100	2,518
Total current assets	40,203	51,344
Marketable securities, long-term	10,435	6,106
Equipment and leasehold improvements, net	1,719	1,400
Intangible and other assets, net	189	230
Goodwill	569	569
Other assets	142	137
Deferred tax assets	363	3,130
Total assets	53,620	62,916
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	2,476	4,081
Advance customer payments	563	655
Accrued expenses	1,840	3,657
Deferred tax liability	29
Total current liabilities	4,908	8,393
Deferred rent	408	327
Deferred warranty revenue	146	353
Deferred tax liability		34
Reserve for income taxes	686	840
Total liabilities	6,148	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, 6,969,772 shares issued and outstanding at December 31, 2012 and 6,933,029 shares issued and outstanding at December 31, 2011	31,410	30,965
Accumulated other comprehensive loss	(157)	(926)
Retained earnings	16,219	22,930
Total stockholders' equity	47,472	52,969
Total liabilities and stockholders' equity	$ 53,620	$ 62,916