Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 5,757	$ 1,694
Accounts receivable, less allowance of $242 and $311 in 2011 and 2010, respectively	8,074	3,331
Inventory, net	9,823	6,987
Prepaid expenses and other current assets	1,199	1,355
Total current assets	24,853	13,367
Property, plant and equipment, net	1,168	1,331
Intangible assets, net	244	342
Goodwill	2,926	2,926
Deferred tax asset	13	11
Other assets	186	170
Total assets	29,390	18,147
Current liabilities:
Term loan payable, current portion	0	2,622
Accounts payable	5,859	4,029
Accrued liabilities	5,759	5,482
Customer deposits	180	5,877
Deferred revenue, current portion	1,905	1,650
Total current liabilities	13,703	19,660
Deferred tax liabilities	598	544
Warranty accrual, long-term	385	424
Deferred revenue, long-term	33	433
Other liabilities, long-term	387	133
Total liabilities	15,106	21,194
Stockholders' equity (deficit):
Preferred stock, par value $0.001, 1,000 shares authorized, no shares issued and outstanding
Common stock, par value $0.001, 50,000 shares authorized; 32,264 and 27,424 shares issued and 30,300 and 25,460 shares outstanding in 2011 and 2010, respectively	33	27
Additional paid-in capital	138,115	118,375
Accumulated other comprehensive loss	(283)	(324)
Accumulated deficit	(107,182)	(104,726)
Stockholders' equity excluding treasury stock	30,683	13,352
Treasury stock (cost of 1,964 shares repurchased)	(16,399)	(16,399)
Total stockholders' equity (deficit)	14,284	(3,047)
Total liabilities and stockholders' equity (deficit)	$ 29,390	$ 18,147