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		291		291
Issuance of common stock, sold for cash, net	$ 2	5,741		5,743
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
Issuance costs of common stock for service
Issuance costs of common stock for service (in Shares)	4,543
Payments for employee withholding taxes related to share based awards
Net loss			(4,360)	(4,360)
Balance at Jun. 30, 2020	$ 3	105,117	(100,227)	4,893
Balance (in Shares) at Jun. 30, 2020	3,398,832
For The Six Months Ended June 30, 2020 and 2021
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
Balance at Mar. 31, 2020	$ 2	100,670	(98,598)	2,074
Balance (in Shares) at Mar. 31, 2020	1,819,981
Stock based compensation		141		141
Issuance of common stock, sold for cash, net		4,306		4,306
Issuance of common stock, sold for cash, net (in Shares)	145,586
Issuance of common stock upon exercise of warrants	$ 1			1
Issuance of common stock upon exercise of warrants (in Shares)	1,428,722
Issuance costs of common stock for service
Issuance costs of common stock for service (in Shares)	4,543
Net loss			(1,629)	(1,629)
Balance at Jun. 30, 2020	$ 3	105,117	(100,227)	4,893
Balance (in Shares) at Jun. 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		337		337
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	1,219		1,220
Issuance of common stock upon exercise of warrants (in Shares)	901,179
Issuance costs of common stock for service
Issuance costs of common stock for service (in Shares)	20,951
Payments for employee withholding taxes related to share based awards		(17)		(17)
Net loss			(3,521)	(3,521)
Balance at Jun. 30, 2021	$ 12	122,073	(107,761)	14,324
Balance (in Shares) at Jun. 30, 2021	12,185,496
Balance at Mar. 31, 2021	$ 12	121,897	(106,061)	15,848
Balance (in Shares) at Mar. 31, 2021	12,164,046
Stock based compensation		182		182
Issuance of common stock upon exercise of warrants		11		11
Issuance of common stock upon exercise of warrants (in Shares)	499
Issuance costs of common stock for service
Issuance costs of common stock for service (in Shares)	20,951
Payments for employee withholding taxes related to share based awards		(17)		(17)
Net loss			(1,700)	(1,700)
Balance at Jun. 30, 2021	$ 12	$ 122,073	$ (107,761)	$ 14,324
Balance (in Shares) at Jun. 30, 2021	12,185,496