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Leases (Tables)
 6 Months Ended
Mar. 31, 2021
Leases [Abstract]  
Lease Cost The following table provides a summary of lease cost components for the three and six months ended March 31, 2021 and 2020, respectively (in thousands):
Three months ended March 31,Six months ended March 31,
Lease Cost2021202020212020
Operating lease cost$629 $580 $1,237 $1,208 
     Less: sublease income(177)(158)(357)(237)
Variable lease cost(1)
109 84 217 178 
Short-term lease cost(2)
319 159 488 349 
Total lease cost$880 $665 $1,585 $1,498 

(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.
Operating Lease Assets and Liabilities The following table provides a summary of the operating lease assets and operating lease liabilities included in our Condensed Consolidated Balance Sheets as of March 31, 2021 and September 30, 2020, respectively (in thousands):
Operating LeasesMarch 31, 2021September 30, 2020
Assets:
Operating lease assets, net$4,390 $5,217 
Liabilities:
Current operating lease liabilities1,948 2,352 
Long-term operating lease liabilities2,897 3,434 
Total lease liabilities$4,845 $5,786 
Maturities of Operating Lease Liabilities
The following table provides the maturities of our operating lease liabilities as of March 31, 2021 (in thousands):
Operating Leases
Remainder of 2021$1,203 
20222,387 
20231,365 
2024101 
2025— 
Thereafter— 
Total future minimum lease payments5,056 
Less: present value discount (imputed interest)(211)
Present value of lease liabilities$4,845