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Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Class A Common Stock
Common stock par value (USD per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	100,000,000
Common stock shares issued (in shares)	11,601,757	11,601,757
Class B Common Stock
Common stock par value (USD per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	1,800,000,000
Common stock shares issued (in shares)	250,625,279	243,241,192

X

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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X

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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