Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 14,970	$ 16,629
Trade accounts receivable, less allowances of $153 and $236, respectively	2,587	5,640
Inventories, net	8,441	9,469
Prepaid and other current assets	997	882
Assets held for sale	410	0
Total current assets	27,405	32,620
Property and equipment, net	1,761	2,325
Other assets	32	33
Total assets	29,198	34,978
Current liabilities:
Accounts payable	1,680	3,257
Accrued liabilities	126	107
Accrued legal and professional fees	181	63
Accrued payroll and related benefits	427	522
Accrued sales commissions	128	325
Accrued severance	115	328
Accrued restructuring	622	0
Accrued warranty reserve	258	331
Deferred revenue	174	0
Total current liabilities	3,711	4,933
Other liabilities	98	107
Total liabilities	3,809	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	126,843	126,875
Accumulated other comprehensive income (loss)	4	(1)
Accumulated deficit	(101,459)	(96,937)
Total stockholders' equity	25,389	29,938
Total liabilities and stockholders' equity	$ 29,198	$ 34,978