Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 3,634	$ 5,480
Accounts receivable	528	786
Inventory	1,612	1,658
Other current assets	277	203
Total current assets	6,051	8,127
Property, plant and equipment, net	1,025	536
Operating lease right-of-use asset, net	487	0
Other assets	21	113
TOTAL ASSETS	7,584	8,776
Current liabilities
Accounts payable	1,427	1,133
Accrued compensation	1,242	1,498
Current portion of operating lease liability	181	0
Other current liabilities	87	209
Total current liabilities	2,937	2,840
Operating lease liability	309	0
Total liabilities	3,246	2,840
Commitments and contingencies
Stockholders' equity
Preferred stock	0	0
Common stock as of September 30, 2019 and December 31, 2018, par value $0.0001 per share; authorized 100,000,000 shares, issued and outstanding 2,879,162 and 513,445, respectively	0	0
Additional paid-in capital	216,173	204,101
Accumulated other comprehensive income:
Foreign currency translation adjustment	1,219	1,223
Accumulated deficit	(213,054)	(199,388)
Total stockholders' equity	4,338	5,936
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	7,584	8,776
Series A Junior Participating Preferred Stock [Member]
Stockholders' equity
Preferred stock	0	0
Series F Convertible Preferred Stock [Member]
Stockholders' equity
Preferred stock	0	0
Series G Convertible Preferred Stock [Member]
Stockholders' equity
Preferred stock	$ 0	$ 0