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Common Stock Warrants - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 22, 2019	Jun. 30, 2020	Jun. 20, 2019	Aug. 31, 2011
Common Stock Warrants [Line Items]
Warrant issued to purchase stock			188,643
Warrants outstanding		62,096
TriplePoint Capital LLC
Common Stock Warrants [Line Items]
Estimated fair value of warrants	$ 0.6
Series A Redeemable Convertible Preferred Stock
Common Stock Warrants [Line Items]
Estimated fair value of warrants				$ 0.1
Common Stock
Common Stock Warrants [Line Items]
Warrant exercisable term	7 years
Common Stock | TriplePoint Capital LLC
Common Stock Warrants [Line Items]
Warrant issued to purchase stock	65,502
Warrant exercise price per share	$ 9.16
Warrant exercisable term	7 years
Common Stock | Series A Redeemable Convertible Preferred Stock
Common Stock Warrants [Line Items]
Warrant issued to purchase stock				188,643
Warrant exercise price per share				$ 0.04
Warrants outstanding		0

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- Definition

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Common stock warrants.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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