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General information (Details)
$ in Millions
 1 Months Ended 8 Months Ended
Mar. 31, 2022
USD ($)
shares
Jan. 31, 2022
USD ($)
Apr. 01, 2022
USD ($)
shares
Dec. 31, 2021
rig
Dec. 27, 2021
USD ($)
Jul. 31, 2021
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Debt refinanced and deferred         $ 1,400.0  
Additional payments due at the completion of the amendment agreements for the deferrals         25.9  
Additional payments due later in 2022         $ 28.6  
2023            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Percent of future net equity offerings         35.00%  
At-The-Market Offering            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Amount authorized for issuance           $ 40.0
Subsequent Event            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Proceeds from issuance of private placement   $ 30.0        
Subsequent Event | At-The-Market Offering            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Number of shares sold in transaction (in shares) | shares 1,521,944   1,521,944      
Sale of stock, consideration received on transaction $ 5.2   $ 5.2      
Jack-Up Rigs            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Number of rigs owned | rig       23    
Number of rigs under construction | rig       5    
Number of jack-up rigs owned, including jack-up rigs under construction | rig       28    
Number of jack-up rigs scheduled for delivery | rig       5    
Warm Stacked Rigs            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Number of rigs owned | rig       5