UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 7,153	$ 16,704
Accounts receivable	1,048	1,233
Prepaid expenses	617	370
Other current assets	19	0
Total current assets	8,837	18,307
Property and Equipment:
Equipment	2,502	1,453
Furniture and fixtures	43	43
Leasehold improvements	67	67
Property, plant and equipment, gross	2,612	1,563
Accumulated depreciation and amortization	(1,417)	(1,097)
Property and equipment, net	1,195	466
Finance leases, right-of-use assets, net	1,696	20
Operating leases, right-of-use assets, net	882	1,010
Other assets	167	79
Total non-current assets	3,940	1,575
TOTAL ASSETS	12,777	19,882
Current Liabilities:
Accounts payable, trade	747	408
Accrued expenses	957	628
Finance lease liabilities, current portion	582	21
Operating lease liabilities, current portion	860	487
PPP loan payable, current portion	0	421
Deferred revenue	822	177
Total current liabilities	3,968	2,142
Non-Current Liabilities:
PPP loan payable, noncurrent portion	0	212
Finance lease liabilities, noncurrent portion	620	0
Operating lease liabilities, noncurrent portion	1,412	1,867
Total non-current liabilities	2,032	2,079
Commitments and contingencies
Stockholders’ equity:
Common stock $0.01 par value: Authorized shares — 80,000 Issued shares — 18,803 in 2021 and 17,428 in 2020 Outstanding shares — 18,793 in 2021 and 17,418 in 2020	188	174
Common stock held in treasury, at cost – 10 shares	(362)	(362)
Additional paid-in capital	83,240	77,187
Accumulated deficit	(76,246)	(61,295)
Accumulated other comprehensive loss	(43)	(43)
Total stockholders’ equity	6,777	15,661
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 12,777	$ 19,882