Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
Class A
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	5,423,861	5,285,904
Common stock, shares outstanding	5,423,861	5,285,904
Class B
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	27,206	27,206
Common stock, shares issued	27,206	27,206
Common stock, shares outstanding	27,206	27,206