Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 3,323	$ 6,391
Accounts receivable		175
Prepaid expenses and other current assets	1,095	912
Total current assets	4,418	7,478
Property and equipment, net	207	189
Operating lease right-of-use asset	270	310
TOTAL ASSETS	4,895	7,977
Current liabilities:
Accounts payable	1,093	1,518
Accrued expenses	975	781
Current portion of long-term debt	75	74
Operating lease liability	167	164
Total current liabilities	2,310	2,537
Long-term debt	82	101
Operating lease liability, net of current portion	103	146
TOTAL LIABILITIES	2,495	2,784
Commitments and contingencies (Note 7)
Stockholders’ equity (deficit):
Common stock, par value of $0.0001 per share; 100,000,000 shares authorized as of March 31, 2023, and December 31, 2022; 54,857,221 and 49,881,613 shares issued as of March 31, 2023 and December 31, 2022, respectively; 54,856,369 and 49,880,761 shares outstanding as of March 31, 2023 and December 31, 2022, respectively	5	5
Additional paid-in capital	327,044	324,875
Treasury stock, at cost; 852 shares of common stock as of March 31, 2023 and December 31, 2022, respectively	(11)	(11)
Accumulated deficit	(324,638)	(319,676)
TOTAL STOCKHOLDERS’ EQUITY	2,400	5,193
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 4,895	$ 7,977