Trust Account and Fair Value Measurement (Details) - USD ($) |
3 Months Ended | 12 Months Ended |
---|---|---|
Mar. 31, 2019 |
Dec. 31, 2018 |
|
Assets: | ||
Carrying value | $ 304,351,000 | $ 304,035,000 |
Gross Unrealized Holding Gain (Loss) | 15,000 | (7,000) |
Quoted Price Prices in Active Markets (Level 1) [Member] | ||
Assets: | ||
Carrying value | 304,365,000 | 304,028,000 |
U.S. government treasury bills [Member] | ||
Assets: | ||
Carrying value | 304,350,000 | 304,034,000 |
Gross Unrealized Holding Gain (Loss) | 15,000 | (7,000) |
U.S. government treasury bills [Member] | Quoted Price Prices in Active Markets (Level 1) [Member] | ||
Assets: | ||
Carrying value | 304,365,000 | 304,027,000 |
Cash and money market [Member] | ||
Assets: | ||
Carrying value | 1,000 | 1,000 |
Gross Unrealized Holding Gain (Loss) | ||
Cash and money market [Member] | Quoted Price Prices in Active Markets (Level 1) [Member] | ||
Assets: | ||
Carrying value | $ 1,000 | $ 1,000 |