Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2017
Dec. 31, 2016
Preferred Stock, par value $ 0.001 $ 0.001
Preferred Stock, shares authorized 200,000,000 200,000,000
Preferred Stock, shares issued 0 0
Preferred Stock, shares outstanding 0 0
Class A Common stock    
Common Stock, par value $ 0.001 $ 0.001
Common Stock, shares authorized 350,000,000 350,000,000
Common Stock, shares issued 49,113,162 47,174,543
Common Stock, shares outstanding 49,113,162 47,174,543
Class T Common stock    
Common Stock, par value $ 0.001 $ 0.001
Common Stock, shares authorized 350,000,000 350,000,000
Common Stock, shares issued 7,300,856 6,585,799
Common Stock, shares outstanding 7,300,856 6,585,799