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SUPPLEMENTAL BALANCE SHEET INFORMATION
9 Months Ended
Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
SUPPLEMENTAL BALANCE SHEET INFORMATION
7.    SUPPLEMENTAL BALANCE SHEET INFORMATION

Trade receivables and contract assets, net consisted of the following:
 June 30,September 30,
2024 2023
Trade receivables$53,737 $77,618 
Unbilled revenue15,910 17,211 
Total69,647 94,829 
Less: Allowance for credit losses(5,780)(7,446)
Trade receivables and contract assets, net of allowances for credit losses$63,867 $87,383 
Inventories, net consisted of the following:
 June 30,September 30,
20242023
Raw materials$2,071 $2,259 
Work in progress78 124 
Finished goods4,483 4,439 
Research Model Inventory34,866 52,524 
Total41,498 59,346 
Less: Obsolescence reserve(2,814)(3,244)
Inventories, net$38,684 $56,102 

Prepaid expenses and other current assets consisted of the following:
June 30,September 30,
20242023
Advances to suppliers$19,949 $19,247 
Prepaid research models3,509 4,300 
Income tax receivable2,545 1,813 
Note receivable1,280 1,226 
Other4,965 6,822 
Prepaid expenses and other current assets$32,248 $33,408 

The composition of other assets is as follows:
 June 30,September 30,
20242023
Long-term advances to suppliers$6,033 $3,681 
Funded status of defined benefit plan3,181 3,036 
Other4,396 3,362 
Other assets$13,610 $10,079 

Accrued expenses and other current liabilities consisted of the following:
 June 30,September 30,
2024 2023
Accrued compensation$7,552 $12,966 
Non-income taxes5,268 4,596 
Accrued interest2,488 2,975 
Other7,756 5,239 
Resolution and Plea Agreements (Note 1)5,000 — 
Accrued expenses and other current liabilities$28,064 $25,776 

The composition of fees invoiced in advance is as follows:
 June 30,September 30,
2024 2023
Customer deposits$22,374 $36,689 
Deferred revenue16,321 18,933 
Fees invoiced in advance$38,695 $55,622 
The composition of other liabilities is as follows:
 June 30,September 30,
20242023
Long-term client deposits$17,000 $5,250 
Other912 1,123 
Resolution and Plea Agreements (Note 1)17,000 — 
Other liabilities$34,912 $6,373