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CONVERTIBLE SENIOR NOTES - Notes Due 2024 (Detail)
1 Months Ended 6 Months Ended
Sep. 30, 2019
USD ($)
Aug. 03, 2024
USD ($)
Jul. 29, 2023
USD ($)
Debt Instrument      
Debt amount settled in cash     $ 1,696,000
Debt instrument, convertible earliest date Jun. 15, 2024    
2024 Notes      
Debt Instrument      
Debt instrument, conversion principal amount $ 1,000    
Conversions during the period   $ 0  
Debt instrument, convertible earliest date Jun. 15, 2024    
2024 Notes | Private Placement [Member]      
Debt Instrument      
Debt instrument, principal amount $ 350,000,000    
Debt instrument, interest rate 0.00%    
2024 Notes | Circumstances (1)      
Debt Instrument      
Debt instrument, convertible trading days 20    
Debt instrument, convertible consecutive trading days 30    
Debt instrument, convertible percentage of stock price 130.00%    
2024 Notes | Circumstances (2)      
Debt Instrument      
Debt instrument, convertible trading days 5    
Debt instrument, convertible consecutive trading days 10    
Debt instrument, convertible percentage of stock price 98.00%    
Debt instrument, conversion principal amount $ 1,000