Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 7,392	$ 5,585
Accounts receivable, net of allowance for doubtful accounts of $2 and $2 at September 30, 2020 and December 31, 2019	304	147
Inventory		4
Prepaid expenses and other current assets	132	642
Other receivable due from related party	762
Total current assets	8,590	6,378
Property and equipment, net	161	181
Operating lease right-of-use asset, net	697	1,065
Other assets	54	54
Total assets	9,502	7,678
Current liabilities:
Accounts payable	1,208	914
Accrued expenses and other current liabilities	2,236	2,561
Current portion of note payable	284
Operating lease liability - current	592	528
Total current liabilities	4,320	4,003
Operating lease liability - noncurrent	161	614
Note payable, net of current portion	225
Deferred revenue	683	691
Total liabilities	5,389	5,308
Stockholders’ equity:
Preferred stock, $0.001 par value, 25,000,000 shares authorized as of September 30, 2020 and December 31, 2019; no shares issued and outstanding as of September 30, 2020 and December 31, 2019
Common stock, $0.001 par value, 100,000,000 shares authorized as of September 30, 2020 and December 31, 2019; 12,428,794 and 6,825,183 shares issued and outstanding as of September 30, 2020 and December 31, 2019	12	7
Additional paid-in capital	117,186	103,433
Accumulated deficit	(113,085)	(101,070)
Total stockholders’ equity	4,113	2,370
Total liabilities and stockholders’ equity	$ 9,502	$ 7,678