Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 17, 2018	Dec. 31, 2020	Dec. 31, 2019	Aug. 15, 2019	May 21, 2019	Mar. 15, 2019	Mar. 14, 2019
Common Stock
Common stock shares issued		105,585,682	105,254,929			105,232,933
Common stock, Number of share outstanding		101,170,915	100,840,162
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Common shares placed into escrow		5,015,898				5,015,898
Preferred Shares
Preferred stock, shares authorized		1,000,000
Preferred stock, par value		$ 0.0001
Preferred stock, shares issued		0
Preferred stock, shares outstanding		0
Warrants
Warrants to issue shares of common stock		16,166,650
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Number of fractional shares issued upon exercise of warrants		0
Treasury Stock, Shares [Abstract]
Repurchase of common stock as part of a share repurchase program			$ 23,559
Share Repurchase Program 2019 Plan
Treasury Stock, Shares [Abstract]
Stock repurchase authorized amount				$ 75,000
Repurchase of common stock as part of a share repurchase program (In Shares)			4,414,767
Repurchase of common stock as part of a share repurchase program			$ 23,600
Remaining authorized repurchase amount			$ 51,400
Private placement
Warrants
Warrants to issue shares of common stock	5,333,334
Aggregate purchase price per warrant	$ 1.50
Aggregate purchase price	$ 8,000
Number of stock issued for each warrant	1
Share price	$ 11.50
Warrant exercisable term	30 days
Public Offering
Warrants
Number of stock issued for each warrant	1
Share price	$ 11.50
Warrant exercisable term	30 days
Number of units sold	32,500,000
Price per unit	$ 10.00
Number of warrants per unit	0.33
Over allotment
Warrants
Number of units sold	2,500,000
Class A ordinary share
Common Stock
Common stock, Number of share outstanding						14,321,606	32,500,000
Common stock, par value (in dollars per share)	$ 0.0001						$ 0.0001
Warrants
Common stock, par value (in dollars per share)	$ 0.0001						$ 0.0001
Class A ordinary share | Public Offering
Warrants
Number of shares per unit	1
Maximum
Warrants
Aggregate purchase price per warrant					$ 10.83