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Commitments and Contingencies (Details)
$ / shares in Units, $ in Millions
 6 Months Ended 9 Months Ended
Dec. 31, 2020
USD ($)
item
$ / shares
shares
Sep. 30, 2021
USD ($)
item
$ / shares
shares
Commitments and Contingencies.    
Maximum number of demands for registration of securities | item 3 3
Numbers of units issued | shares 3,600,000 3,600,000
Granted the underwriters 45 days 45 days
Underwriting cash discount per unit | $ / shares $ 0.20 $ 0.20
Underwriter cash discount | $ $ 5.5 $ 5.5
Deferred fee per unit | $ / shares $ 0.35 $ 0.35
Deferred underwriting fee payable | $ $ 9.7 $ 9.7