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Leases | 9 Months Ended
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Jun. 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 three and nine months ended June 30, 2021 and 2020, respectively (in thousands):
|  | Three months ended June 30, |  | Nine months ended June 30,
Lease Cost |  | 2021 |  | 2020 |  | 2021 |  | 2020
Operating lease cost |  | $ | 598 |  |  | $ | 571 |  |  | $ | 1,835 |  |  | $ | 1,779 |
Less: sublease income |  | (175) |  |  | (156) |  |  | (532) |  |  | (393) |
Variable lease cost(1) |  | 117 |  |  | 86 |  |  | 334 |  |  | 265 |
Short-term lease cost(2) |  | 365 |  |  | 148 |  |  | 853 |  |  | 496 |
Total lease cost |  | $ | 905 |  |  | $ | 649 |  |  | $ | 2,490 |  |  | $ | 2,147 |
(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. 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 Condensed Consolidated Balance Sheets. Our operating lease assets have been reduced by a lease accrual of $0.5 million 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 Condensed Consolidated Balance Sheets as of June 30, 2021 and September 30, 2020, respectively (in thousands):
Operating Leases |  | June 30, 2021 |  | September 30, 2020
Assets: |  |  |  |
Operating lease assets, net |  | $ | 3,732 |  |  | $ | 5,217 |
Liabilities: |  |  |  |
Current operating lease liabilities |  | 1,640 |  |  | 2,352 |
Long-term operating lease liabilities |  | 2,554 |  |  | 3,434 |
Total lease liabilities |  | $ | 4,194 |  |  | $ | 5,786 |
The following table provides the maturities of our operating lease liabilities as of June 30, 2021 (in thousands):
|  | Operating Leases |  |
Remainder of 2021 |  | $ | 469 |  |  |
2022 |  | 2,411 |  |  |
2023 |  | 1,380 |  |  |
2024 |  | 101 |  |  |
2025 |  | — |  |  |
Thereafter |  | — |  |  |
Total future minimum lease payments |  | 4,361 |  |  |
Less: present value discount (imputed interest) |  | (167) |  |  |
Present value of lease liabilities |  | $ | 4,194 |  |  |
The weighted average discount rate as of June 30, 2021 was 4.1%. The weighted average remaining lease term was 1.9 years at June 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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