v3.25.2
Subsequent Events (Details)
Sep. 29, 2025
USD ($)
$ / shares
shares
Sep. 16, 2025
USD ($)
Aug. 15, 2025
USD ($)
item
Jul. 02, 2025
USD ($)
$ / shares
Sep. 07, 2021
$ / shares
Common units          
Subsequent Events          
Cash distributions paid in the period per unit | $ / shares         $ 0.52
Subsequent event          
Subsequent Events          
Authorized for repurchase       $ 10,000,000  
Repurchase program term (in months)       12 months  
Line of Credit Facility, Maximum Borrowing Capacity     $ 25,000,000    
Subsequent event | Daqing Facility          
Subsequent Events          
Final payment which includes balloon payment and last quarterly installment       $ 62,300,000  
Spread on variable rate       1.94%  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]       us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember  
Subsequent event | Revolving credit facilities maturing in August 2027          
Subsequent Events          
Spread on variable rate     2.30%    
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]     us-gaap:SecuredOvernightFinancingRateSofrMember    
Subsequent event | Revolving credit facilities maturing in August 2027 | Aggregate borrowing upto $10 million          
Subsequent Events          
Line of Credit Facility, Maximum Borrowing Capacity     $ 10,000,000    
Commitment fee (in percentage)     0.70%    
Subsequent event | Revolving credit facilities maturing in August 2027 | Aggregate borrowing between $10 million and $20 million          
Subsequent Events          
Commitment fee (in percentage)     0.60%    
Subsequent event | Revolving credit facilities maturing in August 2027 | Aggregate borrowing between $10 million and $20 million | Minimum          
Subsequent Events          
Line of Credit Facility, Maximum Borrowing Capacity     $ 10,000,000    
Subsequent event | Revolving credit facilities maturing in August 2027 | Aggregate borrowing between $10 million and $20 million | Maximum          
Subsequent Events          
Line of Credit Facility, Maximum Borrowing Capacity     20,000,000    
Subsequent event | Revolving credit facilities maturing in August 2027 | Aggregate borrowing exceeding $20 million          
Subsequent Events          
Line of Credit Facility, Maximum Borrowing Capacity     $ 20,000,000    
Commitment fee (in percentage)     0.50%    
Subsequent event | $25 million revolving credit facility | NTT Finance Corporation          
Subsequent Events          
Number of Credit Facilities | item     2    
Line of Credit Facility, Maximum Borrowing Capacity     $ 25,000,000    
Subsequent event | $25 million revolving credit facility | Shinsei          
Subsequent Events          
Line of Credit Facility, Maximum Borrowing Capacity     $ 25,000,000    
Subsequent event | Common units          
Subsequent Events          
Cash distributions paid in the period per unit | $ / shares       $ 0.026  
Aggregate amount paid for repurchase $ 1,640,000        
Aggregate units redeemed | shares 226,374        
Average price per unit | $ / shares $ 7.24        
Subsequent event | Series A Preferred unit          
Subsequent Events          
Cash distribution       $ 1,700,000  
Subsequent event | KNOT Shuttle Tankers 37 AS | Daqing Facility          
Subsequent Events          
Final payment which includes balloon payment and last quarterly installment       $ 62,300,000  
Spread on variable rate       1.94%  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]       us-gaap:SecuredOvernightFinancingRateSofrMember  
Subsequent event | Knutsen Shuttle Tankers 34 AS | Sale and leaseback of the Tove Knutsen          
Subsequent Events          
Lease period   10 years      
Gross sales price   $ 100,000,000      
Realized net proceeds after fees and expenses   $ 32,000,000      
Subsequent event | Daqing Knutsen          
Subsequent Events          
Option to extend term (in years)       5 years  
Charter term for receiving from charterer a rate of hire       7 years  
Subsequent event | Daqing Knutsen | KNOT Shuttle Tankers AS | KNOT Shuttle Tankers 37 AS | KNOT Shuttle Tankers 37 AS          
Subsequent Events          
Purchase price for acquisition       $ 95,000,000  
Capitalized fees       300,000  
Initial costs       24,800,000  
Subsequent event | Daqing Knutsen | KNOT Shuttle Tankers AS | KNOT Shuttle Tankers 37 AS | KNOT Shuttle Tankers 37 AS | Daqing Facility          
Subsequent Events          
Outstanding indebtedness       $ 70,500,000