Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Feb. 18, 2021	Feb. 16, 2021	Jul. 13, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Shareholders Equity [Line Items]
Proceeds from Issuance of Common Stock	$ 12,200			$ 14,453
Issuance of common stock, net of fees				$ 14,453
Stock Issued During Period Shares Warrants Exercised				428,907
Proceeds from Warrant Exercises				$ 4,200
Weighted Average Exercise Price				$ 9.71
Stockholders' Equity totaled				$ 31,373	$ 15,070	$ 17,932	$ 21,086
Common Stock, shares issued				6,960,000	4,542,000
Common Stock, shares outstanding				6,960,000	4,542,000
Preferred Stock, shares issued				0	0
Preferred Stock, shares outstanding				0	0
Common Stock
Shareholders Equity [Line Items]
Shares issued (in shares)				1,989,000
Issuance of common stock, net of fees				$ 2
Stock Issued During Period, Shares, New Issues				1,989,000
Stockholders' Equity totaled				$ 7	$ 5	$ 4	$ 4
IPO [Member]
Shareholders Equity [Line Items]
Shares issued (in shares)		1,710,600
Proceeds from Issuance of Common Stock		$ 13,000
Stock Issued During Period, Shares, New Issues		1,710,600
2021 Registered Direct Offering [Member]
Shareholders Equity [Line Items]
Shares issued (in shares)		1,650,000
Stock Issued During Period, Shares, New Issues		1,650,000
At-The-Market Offering Agreement [Member]
Shareholders Equity [Line Items]
Maximum aggregate offering price			$ 7,000
Commission on aggregate gross proceeds (as a percent)			3.00%
Stockholders' Equity totaled				$ 31,400	$ 15,100
At-The-Market Offering Agreement [Member] | Common Stock
Shareholders Equity [Line Items]
Shares issued (in shares)				278,800
Stock Issued During Period, Shares, New Issues				278,800
Net proceeds				$ 2,300
Common Stock, shares issued				6,960,164
Common Stock, shares outstanding				6,960,164
At-The-Market Offering Agreement [Member] | Preferred Stock
Shareholders Equity [Line Items]
Preferred Stock, shares issued				0
Preferred Stock, shares outstanding				0