STOCKHOLDERS' EQUITY (Details)	9 Months Ended
	Sep. 30, 2018 Vote $ / shares shares	Dec. 31, 2017 $ / shares shares	Sep. 30, 2017 shares
Stockholders' Equity
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, par value | $ / shares	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Shares subject to redemption	43,513,414	44,348,925	44,341,965
Class A Common Stock
Stockholders' Equity
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value | $ / shares	$ 0.0001	$ 0.0001
Number of votes | Vote	1
Common stock, shares issued	2,486,586	1,651,075
Common stock, shares outstanding	2,486,586	1,651,075
Class F Common Stock
Stockholders' Equity
Common stock, shares authorized	20,000,000	20,000,000
Common stock, par value | $ / shares	$ 0.0001	$ 0.0001
Common stock, shares issued	11,500,000	11,500,000
Common stock, shares outstanding	11,500,000	11,500,000