Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.24.0.1
Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets $ 14,585 $ 15,079
Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 5,721 5,605
U.S. government securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 1,208  
Municipal government securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 1,695 1,748
Other debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets   1,177
Fair Value, Inputs, Level 2 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 32,180 42,192
Liabilities 42 20
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 5,721 5,605
Fair Value, Inputs, Level 2 | Fair Value, Recurring | U.S. government securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 5,961 6,549
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Municipal government securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 1,695 1,748
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Other debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 1,208 1,177
Commodity swap contracts | Fair Value, Inputs, Level 2 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 0 204
Liabilities 42 20
Interest rate swap | Fair Value, Inputs, Level 2 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets $ 17,595 $ 26,909