Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions							3 Months Ended
	Dec. 31, 2019	Dec. 13, 2019	Jun. 03, 2019	Mar. 27, 2019	Jan. 22, 2018	Jan. 17, 2018	Mar. 31, 2020	Mar. 31, 2019
Class of Stock [Line Items]
Common stock, shares authorized (shares)							426,000,000
Preferred stock, shares authorized (shares)							1,000,000
Preferred stock, par value (shares)							$ 0.0001
Shares subject to earnout (shares)	6,847,836
Threshold number of trading days price must remain above trigger price (days)							20 days
Trading period that price must remain above trigger price (days)							30 days
Preferred stock, shares outstanding (in shares)							0
Threshold number of days after the closing of business combination to exercise (days)							30 days
Exercise price of warrants (in usd per share)							$ 0.01
Term of warrants			5 years
Threshold number of days or prior written notice that warrants may be called for redemption (days)							30 days
Minimum share price threshold for warrants to be called (in usd per share)							$ 18.00
Common Class A
Class of Stock [Line Items]
Common stock, shares authorized (shares)	200,000,000						200,000,000
Common stock, par value (usd per share)	$ 0.0001						$ 0.0001
Convert Class B (shares)			6,663,953
Sale of stock, number of shares issued in transaction (shares)		16,923,077
Sale of stock, price per share (in usd per share)		$ 6.50
Number of securities called by each warrant (shares)							1
Sale of stock, consideration received per transaction		$ 110.0
Sale of stock, consideration received on transaction		$ 107.7
Common Class B
Class of Stock [Line Items]
Common stock, shares authorized (shares)							25,000,000
Common stock, par value (usd per share)							$ 0.0001
Common Class C
Class of Stock [Line Items]
Common stock, shares authorized (shares)	200,000,000						200,000,000
Common stock, par value (usd per share)	$ 0.0001						$ 0.0001
Convert Class B (shares)			731,383
Number of securities called by each warrant (shares)							1
Ordinary Class B
Class of Stock [Line Items]
Shares canceled (shares)			3,854,664
Convert Class B (shares)			7,395,336
Common Class A (or, at each holder’s election, Class C ordinary shares)
Class of Stock [Line Items]
Exercise price of warrants (in usd per share)							$ 11.50
IPO
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (shares)					30,000,000
Private Placement
Class of Stock [Line Items]
Sale of stock, price per share (in usd per share)			$ 10.00
Private Placement | Common Class A (or, at each holder’s election, Class C ordinary shares)
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (shares)			15,000,000
Public Warrants | IPO
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (shares)					15,000,000
Number of securities called by each warrant (shares)					2
Forward Purchase Warrants | Private Placement
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (shares)			5,000,000
Number of securities called by each warrant (shares)			3
Private Placement Warrants | Common Class A
Class of Stock [Line Items]
Convert private placement warrants (shares)				742,926
Private Placement Warrants | Private Placement
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (shares)						8,000,000
Sale of stock, price per share (in usd per share)						$ 1.00
Number of warrants canceled (shares)				7,429,256
Threshold number of days after the closing of business combination to exercise (days)				30 days
Private Placement Warrants | Private Placement | Common Class A
Class of Stock [Line Items]
Number of securities called by each warrant (shares)				0.1
Shares subject to a $12.25 earn-out
Class of Stock [Line Items]
Business combination, earn out price (usd per share)							12.25	$ 12.25
Shares subject to a $12.25 earn-out | Common Class A
Class of Stock [Line Items]
Shares subject to earnout (shares)			157,500
Business combination, earn out price (usd per share)			$ 12.25
Threshold number of trading days price must remain above trigger price (days)			20 days
Trading period that price must remain above trigger price (days)			30 days
Shares subject to a $15.00 earn-out
Class of Stock [Line Items]
Business combination, earn out price (usd per share)							15.00	15.00
Shares subject to a $15.00 earn-out | Common Class A
Class of Stock [Line Items]
Shares subject to earnout (shares)			2,940,336
Business combination, earn out price (usd per share)			$ 15.00
Threshold number of trading days price must remain above trigger price (days)			20 days
Trading period that price must remain above trigger price (days)			30 days
Shares subject to a $12.50 earn-out
Class of Stock [Line Items]
Business combination, earn out price (usd per share)							$ 12.50	$ 12.50
Shares subject to a $12.50 earn-out | Common Class A (or, at each holder’s election, Class C ordinary shares)
Class of Stock [Line Items]
Shares subject to earnout (shares)			3,750,000
Business combination, earn out price (usd per share)			$ 12.50
Threshold number of trading days price must remain above trigger price (days)			20 days
Trading period that price must remain above trigger price (days)			30 days