Balance Sheet Parenthetical - $ / shares	Sep. 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	12,941,147	12,802,455
Common Class B [Member]
Class A Common stock, par value	$ 0.01	$ 0.01
Class A Common stock, shares outstanding	3,855,790	3,864,462