Balance Sheet Parenthetical - $ / shares	Jun. 30, 2020	Dec. 31, 2019
Common Class A [Member]
Class A Common stock, par value	$ 0.01	$ 0.01
Class A Common stock, shares outstanding	12,930,874	12,802,455
Common Class B [Member]
Class A Common stock, par value	$ 0.01	$ 0.01
Class A Common stock, shares outstanding	3,857,475	3,864,462

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: 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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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant