Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Purchase Commitments (Details)

v3.21.2
Commitments and Contingencies - Purchase Commitments (Details) - Public Utilities, Inventory, Fuel - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Unrecorded Unconditional Purchase Obligation [Line Items]    
2022   $ 51
Total $ 100 $ 51