Note 3 - Public Offering and Private Placement (Details Textual) - USD ($)		1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 17, 2018	Jan. 31, 2020	Nov. 30, 2019	Mar. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Sale of Stock, Price Per Unit	$ 10
Proceeds from Issuance Initial Public Offering	$ 414,000,000					$ 414,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 11.50					$ 1
Class of Warrant Or Right, Redemption Price Per Share	$ 0.01
Class of Warrant Or Right, Redemption Period	30 days
Class of Warrant Or Right, Redemption, Stock Price Trigger	$ 18
Purchase Price of Public Warrant for Sponsor Committed to Offer or Cause Affiliate	$ 1
Percentage of Public Shares Would Affect From Redemption Upon Meeting of Conditions of Business Combinations	100.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						10,280,000
The Sponsor [Member]
Purchase Price of Public Warrant for Sponsor Committed to Offer or Cause Affiliate					$ 1
Class of Warrant or Right, Issued During Period			248,000	17,293,805
The Sponsor [Member] | Subsequent Event [Member]
Class of Warrant or Right, Issued During Period		17,293,805
Class of Warrant or Right, Outstanding				17,541,805
IPO [Member]
Units Issued During Period	41,400,000
Sale of Stock, Price Per Unit	$ 10
Underwriting Discount	2.00%
Overallotment [Member]
Units Issued During Period	5,400,000
Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1				$ 1
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	10,280,000
Warrants and Rights Outstanding	$ 10,280,000