CONDENSED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Ordinary shares subject to possible redemption	20,413,625	20,199,048

The number of shares that would be issued, determined under the conditions specified in the contract, if the settlement were to occur at the reporting date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879

Name:	us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsNumberOfShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant