Consolidated Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 11,699,000	$ 31,560,000
Restricted cash	200,000	0
Accounts receivable, less allowance of $1,765 and $1,711 in 2015 and 2014, respectively	8,948,000	9,004,000
Inventory, net	12,566,000	12,508,000
Prepaid expenses and other current assets	1,387,000	1,726,000
Total current assets	34,800,000	54,798,000
Property, plant, and equipment, net	3,727,000	1,295,000
Intangible assets, net	51,000	114,000
Goodwill	2,926,000	2,926,000
Other assets	747,000	270,000
Total assets	42,251,000	59,403,000
Current liabilities:
Accounts payable	5,960,000	8,357,000
Accrued liabilities	5,906,000	5,188,000
Customer deposits	85,000	112,000
Deferred revenue, current portion	3,155,000	2,494,000
Total current liabilities	15,106,000	16,151,000
Deferred income taxes, net	738,000	677,000
Deferred revenue, long-term	142,000
Capital lease obligation, long-term	159,000
Warranty accrual, long-term	843,000	519,000
Other liabilities, long-term	338,000
Total liabilities	$ 17,326,000	$ 17,347,000
Commitments and contingencies (Note 7)
Stockholders' equity:
Preferred stock, par value $0.001; 1,000 shares authorized, no shares issued and outstanding
Common stock, par value $0.001; 100,000 shares authorized,58,228 and 58,115 shares issued and outstanding in 2015 and 2014, respectively	$ 58,000	$ 58,000
Additional paid-in capital	188,622,000	185,231,000
Accumulated other comprehensive loss	(801,000)	(557,000)
Accumulated deficit	(162,954,000)	(142,676,000)
Total stockholders' equity	24,925,000	42,056,000
Total liabilities and stockholders' equity	$ 42,251,000	$ 59,403,000