COMMON STOCK, AUTHORIZED (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	May 09, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Feb. 11, 2020
Common stock, number of shares, par value and other disclosures
Common stock, authorized		2,000,000		2,000,000
Common stock, par value (in dollars per share)		$ 0.00001		$ 0.00001		$ 0.00001
Common stock, issued		1,370,595		1,370,595
Common stock, outstanding		1,370,595		1,370,595
Proceeds from exercise of warrants			$ 8,509
2018 Warrants
Common stock, number of shares, par value and other disclosures
Shares issued on exercise of warrants		0
Common Stock
Common stock, number of shares, par value and other disclosures
Common stock, issued		1,370,595	1,370,593	1,370,595	945,276
October 2020 Offering | Common Stock
Common stock, number of shares, par value and other disclosures
Proceeds from issuance of common stock and warrants, net of issuance costs			$ 8,500
October 2020 Offering | Common Stock | Series A Prefunded Warrants October 2020
Common stock, number of shares, par value and other disclosures
Issuance of common stock and warrants in public offerings (in shares)			424,829
October 2020 Offering | Common Stock | Placement Agent Warrants
Common stock, number of shares, par value and other disclosures
Issuance of common stock and warrants in public offerings (in shares)			488
Subsequent event
Common stock, number of shares, par value and other disclosures
Issuance of common stock and warrants in public offerings (in shares)	20,619