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Stockholders' Equity - Preferred Stock (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Shares designated (in shares)	20,000,000	20,000,000
Series A Convertible Preferred Stock
Class of Stock [Line Items]
Par value (in dollars per share)	$ 0.001
Shares designated (in shares)	277,100
Liquidation preference	$ 606,000
Shares outstanding (in shares)	60,600	60,600
Series B Convertible Preferred Stock
Class of Stock [Line Items]
Par value (in dollars per share)	$ 0.001
Shares designated (in shares)	8,860
Shares outstanding (in shares)	0	0
Series C Convertible Preferred Stock
Class of Stock [Line Items]
Par value (in dollars per share)	$ 0.001
Shares designated (in shares)	200,000
Shares outstanding (in shares)	0	0
Series D Convertible Preferred Stock
Class of Stock [Line Items]
Par value (in dollars per share)	$ 0.0001
Shares designated (in shares)	154,670
Shares outstanding (in shares)	0	0
Series E Convertible Preferred Stock
Class of Stock [Line Items]
Par value (in dollars per share)	$ 0.001
Shares designated (in shares)	865,824
Shares outstanding (in shares)	655,044	655,044

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Value of the difference between preference in liquidation and the par or stated values of the preferred shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(d))
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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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