Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash	$ 15,165	$ 3,643
Accounts receivable trade, net	27	25
Prepaid expenses	360	178
Inventory	905	945
Deposits	26	28
Total current assets	16,483	4,819
Right to use asset-operating leases	627	665
Property and equipment, net	528	538
Total assets	17,638	6,022
Current liabilities:
Short-term debt	79	98
Accounts payable	175	404
Accrued expenses	238	292
Total current liabilities	492	794
Long-term debt, net	662	673
Operating lease liability	636	671
Total liabilities	1,790	2,138
Commitments and contingencies (See note 12)
Stockholders’ equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 12,164,046 and 5,099,512 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	12	5
Additional paid-in capital	121,897	108,119
Accumulated deficit	(106,061)	(104,240)
Total stockholders’ equity	15,848	3,884
Total liabilities and stockholders’ equity	$ 17,638	$ 6,022