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Condensed Consolidated Statements of Changes in Stockholders' Equity (unaudited) (Parenthetical) - USD ($)	3 Months Ended			9 Months Ended
	Jun. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021
Statement of Stockholders' Equity [Abstract]
Offering costs	$ 790,000	$ 660,000	$ 920,000	$ 1,580,000

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

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Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration