Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2017
Dec. 31, 2016
Class A Common Stock [Member]    
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 9,769,961 9,752,531
Common stock, shares outstanding 9,769,961 9,752,531
Class B Common Stock [Member]    
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 5,400,000 5,400,000
Common stock, shares outstanding 5,400,000 5,400,000