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Supporting Financial Information
 3 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Supporting Financial Information Supporting Financial Information
Accounts receivable
(in thousands)
December 31,September 30,
Ref20212021
Billed receivables$38,168 $26,140 
Contract assets8,675 7,307 
Total accounts receivable46,843 33,447 
Less: Allowance for doubtful accounts(a)— — 
Accounts receivable, net$46,843 $33,447 

Ref (a): Accounts receivable are non-interest bearing, unsecured and carried at net realizable value. We evaluate our receivables on a quarterly basis and determine whether an allowance is appropriate based on specific collection issues. No allowance for doubtful accounts was deemed necessary at either December 31, 2021 or September 30, 2021.
Other current assets
(in thousands)
December 31,September 30,
20212021
Prepaid insurance and benefits$416 $655 
Other receivables999 995 
Other prepaid expenses3,482 2,615 
Other current assets$4,897 $4,265 


Equipment and improvements, net
(in thousands)
December 31,September 30,
Ref20212021
Furniture and equipment$958 $958 
Computer equipment1,262 1,262 
Computer software4,353 4,353 
Leasehold improvements1,595 1,595 
Total equipment and improvements8,168 8,168 
Less accumulated depreciation and amortization(a)(6,595)(6,256)
Equipment and improvements, net$1,573 $1,912 

Ref (a): Depreciation expense was $0.3 million and $0.4 million for the three months ended December 31, 2021 and 2020, respectively.


Intangible assets
(in thousands)
December 31,September 30,
Ref20212021
Intangible assets(a)
Customer contracts and related customer relationships$62,281 $62,281 
Covenants not to compete522 522 
Trade name3,051 3,051 
Total intangible assets65,854 65,854 
Less accumulated amortization
Customer contracts and related customer relationships(18,935)(17,378)
Covenants not to compete(277)(264)
Trade name(819)(743)
Total accumulated amortization(20,031)(18,385)
Intangible assets, net$45,823 $47,469 

Ref (a): Intangible assets (other than goodwill) are subject to amortization. These intangible assets are amortized on a straight-line basis over their estimated useful lives of 10 years. The total amount of amortization expense was $1.6 million for the three months ended December 31, 2021 and 2020.
Estimated amortization expense for the following fiscal years:(in thousands)
2022 (remaining)$4,939 
20236,585 
20246,585 
20256,585 
20265,851 
Thereafter15,278 
Total amortization expense$45,823 


Accounts payable, accrued expenses, and other current liabilities
(in thousands)
December 31,September 30,
20212021
Accounts payable$14,198 $16,684 
Accrued benefits2,803 2,916 
Accrued bonus and incentive compensation1,200 2,381 
Accrued workers' compensation insurance5,885 7,014 
Other accrued expenses6,297 3,722 
Accounts payable, accrued expenses, and other current liabilities$30,383 $32,717 


Debt obligations
(in thousands)
December 31,September 30,
20212021
Bank term loan$42,875 $46,750 
Less: unamortized deferred financing costs(1,996)(2,114)
Long-term portion of bank debt obligations, net of deferred financing costs$40,879 $44,636 
    
Interest expense
Three Months Ended
 December 31,
(in thousands)Ref20212020
Interest expense(a)$(521)$(870)
Amortization of deferred financing costs(b)(151)(210)
Interest expense, net$(672)$(1,080)

Ref (a): Interest expense on borrowing
Ref (b): Amortization of expenses related to term loan and revolving line of credit