Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 4,524	$ 7,340
Marketable securities	7,801	11,438
Accounts receivable, less allowance for doubtful accounts of $740 at September 30, 2013 and $775 at December 31, 2012	7,548	6,129
Inventories	12,457	12,533
Income tax refunds receivable	789	1,325
Other current assets	1,407	1,338
Deferred tax assets	100	100
Total current assets	34,626	40,203
Marketable securities, long-term	11,445	10,435
Equipment and leasehold improvements, net	1,438	1,719
Intangible and other assets, net	133	189
Goodwill	569	569
Other assets	195	142
Deferred tax assets	197	363
Total assets	48,603	53,620
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	4,124	2,476
Advance customer payments	283	563
Accrued expenses	1,882	1,840
Deferred tax liability	29	29
Total current liabilities	6,318	4,908
Deferred rent	383	408
Deferred warranty revenue	197	146
Reserve for income taxes	244	686
Total liabilities	7,142	6,148
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, 6,666,984 shares issued and outstanding at September 30, 2013 and 6,969,772 shares issued and outstanding at December 31, 2012	29,815	31,410
Accumulated other comprehensive loss	(453)	(157)
Retained earnings	12,099	16,219
Total stockholders' equity	41,461	47,472
Total liabilities and stockholders' equity	$ 48,603	$ 53,620