Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Common stock, shares outstanding	16,647,998	13,222,583
Class A common stock
Common stock, par value	$ 0.001	$ 0.001
Common stock authorized	125,000,000	125,000,000
Common Stock, Shares, Issued	16,647,998	13,222,583
Common stock, shares outstanding	16,647,998	13,222,583
Class B common stock
Common stock, par value	$ 0.001	$ 0.001
Common stock authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	9,042,773	8,268,188
Common stock, shares outstanding	9,042,773	8,268,188