Quarterly report pursuant to Section 13 or 15(d)

Trust Account and Fair Value Measurement (Details)

v3.19.2
Trust Account and Fair Value Measurement (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Assets:    
Carrying value $ 305,690,000 $ 304,035,000
Gross Unrealized Holding Gain (Loss) 42,000 (7,000)
Quoted Price Prices in Active Markets (Level 1) [Member]    
Assets:    
Carrying value 305,732,000 304,028,000
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
U.S. government treasury bills [Member]    
Assets:    
Carrying value 305,689,000 304,034,000
Gross Unrealized Holding Gain (Loss) 42,000 (7,000)
U.S. government treasury bills [Member] | Quoted Price Prices in Active Markets (Level 1) [Member]    
Assets:    
Carrying value $ 305,731,000 $ 304,027,000