Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Preferred stock, par value	$ 0.01		$ 0.01
Preferred stock, shares authorized	2,000,000		2,000,000
Preferred stock, shares issued	0	0
Class A Common Stock [Member]
Common stock, par value	$ 0.01		$ 0.01
Common stock, shares authorized	50,000,000		50,000,000
Common stock, shares issued	26,299,946		26,203,935
Common stock, shares outstanding	23,297,358		23,201,347
Class B Common Stock [Member]
Common stock, par value	$ 0.01		$ 0.01
Common stock, shares authorized	10,000,000		10,000,000
Common stock, shares issued	5,649,240		5,649,240
Common stock, shares outstanding	5,576,775		5,576,775