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Leases | 12 Months Ended
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Sep. 30, 2021
Leases [Abstract] |
Leases | Leases Our leases consist primarily of office and manufacturing space, construction equipment and office equipment. All of our future lease obligations are related to non-cancelable operating leases. The most significant portion of our lease portfolio relates to leases of office and manufacturing facilities in Canada which we no longer occupy. We currently sublease the majority of these Canadian facilities. The following table provides a summary of lease cost components for the years ended September 30, 2021 and 2020, respectively (in thousands):
Lease Cost |  | 2021 |  | 2020
Operating lease cost |  | $ | 2,435 |  |  | $ | 2,389 |
Less: sublease income |  | (706) |  |  | (555) |
Variable lease cost(1) |  | 443 |  |  | 351 |
Short-term lease cost(2) |  | 1,281 |  |  | 677 |
Total lease cost |  | $ | 3,453 |  |  | $ | 2,862 |
(1) Variable lease cost represents common area maintenance charges related to our Canadian office space lease.
(2) Short-term lease cost includes leases and rentals with initial terms of one year or less.
For the year ended September 30, 2019, rent expense related to operating leases was $3.5 million; however, this amount did not include rent expense related to leases and rentals with initial terms of one year or less, which are included in short-term cost in the table above. For the year ended September 30, 2019, sublease income from third parties was $1.3 million; however, this amount included common area maintenance charges, which are included in variable lease cost in the table above. In Fiscal 2019, we recorded additional lease expense of $0.7 million related to certain facility leases in Canada that are no longer utilized in our operations. We recognize operating lease assets and operating lease liabilities representing the present value of the remaining lease payments for leases with initial terms greater than twelve months. Leases with initial terms of twelve months or less are not recorded in our Consolidated Balance Sheets. As of September 30, 2021 and 2020, our operating lease assets have been reduced by a lease accrual of $0.4 million and $0.6 million, respectively, related to certain unused facility leases in Canada. The following table provides a summary of the operating lease assets and operating lease liabilities included in our Consolidated Balance Sheets as of September 30, 2021 and 2020, respectively (in thousands):
|  | September 30,
Operating Leases |  | 2021 |  | 2020
Assets: |  |  |  |
Operating lease assets, net |  | $ | 3,453 |  |  | $ | 5,217 |
Liabilities: |  |  |  |
Current operating lease liabilities |  | 1,415 |  |  | 2,352 |
Long-term operating lease liabilities |  | 2,413 |  |  | 3,434 |
Total lease liabilities |  | $ | 3,828 |  |  | $ | 5,786 |
The following table provides the maturities of our operating lease liabilities as of September 30, 2021 (in thousands):
|  | Operating Leases
2021 |  | $ | 2,351 |
2022 |  | 1,448 |
2023 |  | 164 |
2024 |  | — |
2025 |  | — |
Thereafter |  | — |
Total future minimum lease payments |  | $ | 3,963 |
Less: present value discount (imputed interest) |  | (135) |
Present value of lease liabilities |  | $ | 3,828 |
The weighted average discount rate as of September 30, 2021 was 4.04%. The weighted average remaining lease term was 1.75 years at September 30, 2021.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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