Condensed Consolidated Statements of Changes in Stockholders’ Equity (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Issuance of common stock, net of offering cost	$ 8,260	$ 655
Issuance of common stock and prefunded warrants net of offering cost		$ 958

Issuance of common stock warrants and prefunded warrants net of offering cost.

No definition available.

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Balance Type:	credit
Period Type:	duration