Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,207	$ 6,335
Trade accounts receivable, less allowances of $71 and $33, respectively	1,805	2,201
Inventories, net	7,667	8,058
Prepaid and other current assets	533	1,094
Total current assets	12,212	17,688
Property and equipment, net	422	610
Operating lease right-of-use assets	1,541
Restructured lease, right-of-use asset	469
Other assets	225	194
Total assets	14,869	18,492
Current liabilities:
Accounts payable	2,000	3,606
Accrued liabilities	40	73
Accrued legal and professional fees	74	160
Accrued payroll and related benefits	214	435
Accrued sales commissions	115	115
Accrued severance	73	188
Accrued restructuring	28	156
Accrued warranty reserve	342	258
Deferred revenue	13	30
Operating lease liabilities	531
Restructured lease liabilities	357
Finance Lease, Liability, Current	3	0
Credit line borrowings	1,652	2,219
Convertible notes	1,700	0
Total current liabilities	7,142	7,240
Other liabilities	29	200
Operating lease liabilities	1,210
Restructured lease liabilities	331
Finance lease liabilities	5
Total liabilities	8,717	7,440
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	128,774	128,367
Accumulated other comprehensive loss	(3)	(1)
Accumulated deficit	(122,620)	(117,315)
Total stockholders' equity	6,152	11,052
Total liabilities and stockholders' equity	$ 14,869	$ 18,492