Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 16,704	$ 3,334
Accounts receivable	1,233	1,566
Prepaid expenses	370	152
Total current assets	18,307	5,052
Property and Equipment:
Equipment	1,453	1,138
Furniture and fixtures	43	43
Leasehold improvements	67	63
Property, Plant and Equipment, Gross	1,563	1,244
Accumulated depreciation and amortization	(1,097)	(909)
Property, Plant and Equipment, Net	466	335
Finance leases, right-of-use assets, net	20	62
Operating leases, right-of-use asset, net	1,010	1,348
Other assets	79	38
TOTAL ASSETS	19,882	6,835
Current Liabilities:
Accounts payable, trade	408	252
Accrued expenses	628	828
Dividends payable	0	20
Finance leases liabilities, current portion	21	43
Operating leases liabilities, current portion	487	284
PPP loan payable, current portion	421	0
Deferred revenue	177	516
Total current liabilities	2,142	1,943
Finance leases liability, noncurrent portion	0	21
PPP loan payable, noncurrent portion	212	0
Operating leases liability, noncurrent portion	1,867	1,315
Commitments and contingencies
Stockholders equity:
Common stock, $0.01 par value: Authorized shares - 80,000 Issued shares - 17,428 in 2020 and 13,552 in 2019 Outstanding shares - 17,418 in 2020 and 13,542 in 2019	174	136
Common stock held in treasury, at cost - 10 shares	(362)	(362)
Additional paid-in-capital	77,187	56,759
Accumulated deficit	(61,295)	(54,777)
Accumulated other comprehensive loss	(43)	(43)
Total stockholders equity	15,661	3,556
TOTAL LIABILITIES AND STOCKHOLDERS EQUITY	19,882	6,835
Series 1 Preferred Stock [Member]
Stockholders equity:
Preferred stock	0	707
Series 2 Preferred Stock [Member]
Stockholders equity:
Preferred stock	0	724
Series 3 Preferred Stock [Member]
Stockholders equity:
Preferred stock	$ 0	$ 412