Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 13,487	$ 16,629
Trade accounts receivable, less allowances of $89 and $236, respectively	3,460	5,640
Inventories, net	7,901	9,469
Prepaid and other current assets	1,004	882
Assets held for sale	410	0
Total current assets	26,262	32,620
Property and equipment, net	1,507	2,325
Other assets	33	33
Total assets	27,802	34,978
Current liabilities:
Accounts payable	3,170	3,257
Accrued liabilities	206	107
Accrued legal and professional fees	179	63
Accrued payroll and related benefits	254	522
Accrued sales commissions	69	325
Accrued severance	10	328
Accrued restructuring	617	0
Accrued warranty reserve	179	331
Deferred revenue	18	0
Total current liabilities	4,702	4,933
Other liabilities	577	107
Total liabilities	5,279	5,040
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.0001 per share: Authorized: 2,000,000 shares in 2017 and 2016, 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 2017 and 2016, Issued and outstanding: 11,690,030 at September 30, 2016 and 11,648,978 at December 31, 2015	1	1
Additional paid-in capital	127,094	126,875
Accumulated other comprehensive income (loss)	1	(1)
Accumulated deficit	(104,573)	(96,937)
Total stockholders' equity	22,523	29,938
Total liabilities and stockholders' equity	$ 27,802	$ 34,978