Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 350	$ 6,335
Cash	692	6,335
Trade accounts receivable, less allowances of $28 and $33, respectively	2,337	2,201
Inventories, net	6,168	8,058
Prepaid and other current assets	479	1,094
Total current assets	9,334	17,688
Property and equipment, net	389	610
Operating lease, right-of-use asset	1,289
Restructured lease, right-of-use asset	322
Other assets	405	194
Total assets	11,739	18,492
Current liabilities:
Accounts payable	1,340	3,606
Accrued liabilities	179	73
Accrued legal and professional fees	215	160
Accrued payroll and related benefits	360	435
Accrued sales commissions	32	115
Accrued severance	7	188
Accrued restructuring	24	156
Accrued warranty reserve	195	258
Deferred revenue	18	30
Operating lease liabilities	550
Restructured lease liabilities	319
Finance lease liabilities, net of current portion	3
Credit line borrowings	715	2,219
Convertible notes	1,700	0
Iliad note, net of discount and loan origination fees	885	0
Total current liabilities	6,542	7,240
Other liabilities	14	200
Operating lease liabilities, net of current portion	906
Restructured lease liabilities, net of current portion	168
Finance lease liabilities	4
Iliad note, net of current maturities	109	0
Total liabilities	7,743	7,440
STOCKHOLDERS’ EQUITY
Preferred stock, par value $0.0001 per share: Authorized: 2,000,000 shares in 2019 and 2018 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 2019 and 2018 Issued and outstanding: 11,710,549 at December 31, 2016 and 11.648,978 at December 31, 2015	1	1
Additional paid-in capital	128,872	128,367
Accumulated other comprehensive loss	(3)	(1)
Accumulated deficit	(124,874)	(117,315)
Total stockholders' equity	3,996	11,052
Total liabilities and stockholders' equity	$ 11,739	$ 18,492