Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 19,587	$ 34,640
Trade accounts receivable, less allowances of $103 and $155, respectively	5,074	10,110
Inventories, net	14,017	7,732
Prepaid and other current assets	1,061	740
Total current assets	39,739	53,222
Property and equipment, net	3,313	2,429
Other assets	38	51
Total assets	43,090	55,702
Current liabilities:
Accounts payable	3,371	7,295
Accrued liabilities	624	355
Accrued payroll and related benefits	924	1,243
Accrued sales commissions	384	1,005
Accrued warranty reserve	295	314
Deferred revenue	0	93
Total current liabilities	5,598	10,305
Other liabilities	99	77
Total liabilities	5,697	10,382
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.0001 per share: Authorized: 2,000,000 shares in 2016 and 2015, Issued and outstanding: no shares in 2016 and 2015	0	0
Common stock, par value $0.0001 per share: Authorized: 30,000,000 shares in 2016 and 2015, Issued and outstanding: 11,690,030 at September 30, 2016 and 11,648,978 at December 31, 2015	1	1
Additional paid-in capital	126,522	125,369
Accumulated other comprehensive income	2	0
Accumulated deficit	(89,132)	(80,050)
Total stockholders' equity	37,393	45,320
Total liabilities and stockholders' equity	$ 43,090	$ 55,702