Consolidated Balance Sheets (Parenthetical) shares in Thousands	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Class A Common Stock
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares, issued (in shares) \| shares	9,805	9,291
Class B Common Stock
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares, issued (in shares) \| shares	4,076	4,422
Common stock, convertible conversion ratio	1	1

Common Stock, Convertible Conversion Ratio

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- 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=6877327&loc=d3e13212-122682

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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

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ 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(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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