Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Assets and liabilities that are measured at fair value on a recurring basis (Details)

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Fair Value Measurements - Assets and liabilities that are measured at fair value on a recurring basis (Details) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 12 Months Ended
Jun. 12, 2021
Jun. 11, 2021
Jul. 31, 2021
Jul. 31, 2021
Apr. 30, 2021
Jul. 31, 2020
Apr. 30, 2020
Jun. 11, 2021
Jul. 31, 2021
Jul. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                        
Financial Designation, Predecessor and Successor [Fixed List] Successor Predecessor Successor Successor Predecessor Predecessor Predecessor Predecessor Successor Predecessor Predecessor Predecessor
Recurring member                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                        
Private Placement Warrants - Sponsor     $ 28,525 $ 28,525         $ 28,525      
Total assets recorded at fair value     28,525 28,525         28,525      
Level 3 | Recurring member                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                        
Private Placement Warrants - Sponsor     28,525 28,525         28,525      
Total assets recorded at fair value     $ 28,525 $ 28,525         $ 28,525