Condensed Statements of Changes in Stockholders’ Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2019	$ 1	$ 98,433	$ (95,867)	$ 2,567
Balance (in Shares) at Dec. 31, 2019	1,414,671
Stock based compensation		453		453
Issuance of common stock, sold for cash, net	$ 2	5,739		5,741
Issuance of common stock, sold for cash, net (in Shares)	1,928,180
Issuance of common stock upon exercise of warrants		238		238
Issuance of common stock upon exercise of warrants (in Shares)	51,414
Payments for employee withholding taxes related to share based awards
Issuance costs of common stock for services
Issuance costs of common stock for services (in Shares)	4,543
Issuance of common stock for fractional shares-20-1 reverse split
Issuance of common stock for fractional shares-20-1 reverse split (in Shares)	24
Warrant antidilution price protection adjustment		414		414
Net loss			(6,279)	(6,279)
Balance at Sep. 30, 2020	$ 3	105,277	(102,146)	3,134
Balance (in Shares) at Sep. 30, 2020	3,398,832
Balance at Jun. 30, 2020	$ 3	105,117	(100,227)	4,893
Balance (in Shares) at Jun. 30, 2020	3,398,832
Stock based compensation		162		162
Offering expenses for June, 2020 share offering		(2)		(2)
Net loss			(1,919)	(1,919)
Balance at Sep. 30, 2020	$ 3	105,277	(102,146)	3,134
Balance (in Shares) at Sep. 30, 2020	3,398,832
Balance at Dec. 31, 2020	$ 5	108,119	(104,240)	3,884
Balance (in Shares) at Dec. 31, 2020	5,099,512
Stock based compensation		550		550
Issuance of common stock, sold for cash, net	$ 6	12,415		12,421
Issuance of common stock, sold for cash, net (in Shares)	6,163,854
Issuance of common stock upon exercise of warrants	$ 1	1,227		1,228
Issuance of common stock upon exercise of warrants (in Shares)	906,795
Payments for employee withholding taxes related to share based awards		(17)		(17)
Issuance costs of common stock for services
Issuance costs of common stock for services (in Shares)	20,951
Net loss			(5,774)	(5,774)
Balance at Sep. 30, 2021	$ 12	122,294	(110,014)	12,292
Balance (in Shares) at Sep. 30, 2021	12,191,112
Balance at Jun. 30, 2021	$ 12	122,073	(107,761)	14,324
Balance (in Shares) at Jun. 30, 2021	12,185,496
Stock based compensation		213		213
Issuance of common stock upon exercise of warrants		8		8
Issuance of common stock upon exercise of warrants (in Shares)	5,616
Net loss			(2,253)	(2,253)
Balance at Sep. 30, 2021	$ 12	$ 122,294	$ (110,014)	$ 12,292
Balance (in Shares) at Sep. 30, 2021	12,191,112