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SEGMENT AND GEOGRAPHIC INFORMATION
 6 Months Ended
Mar. 31, 2026
Segment Reporting [Abstract]  
SEGMENT AND GEOGRAPHIC INFORMATION
3.    SEGMENT AND GEOGRAPHIC INFORMATION

We have two reportable segments: DSA and RMS, as disclosed in the segment reporting policy in Note 2, “Basis of Presentation and Summary of Significant Accounting Policies” in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2025. The reportable segments comprise the structure used by the Company’s Chief Executive Officer, who is the Chief Operating Decision Maker ("CODM"), to make operating decisions and evaluate performance.

The Company’s CODM evaluates the segments' operating results based on operating income (loss). Segment operating income (loss) is the measure of profit or loss regularly provided to and used by the CODM to assess performance and allocate resources (including employees, property, and financial or capital resources). For each segment, the CODM uses segment operating income (loss) in the annual budgeting and monthly forecasting process when comparing to actual results. Segment operating income (loss) is defined as operating income (loss) excluding unallocated corporate expenses, depreciation and amortization of intangible assets, start-up costs, restructuring costs, and other special segment items. Other special segment items include third party and legal costs incurred in connection with the Resolution Agreement and Plea Agreement and legal fees related to another matter.

Segment Information

During the three and six months ended March 31, 2026, the RMS segment reported intersegment revenue of $3,417 and $6,397, respectively, related to sales to the DSA segment. During the three and six months ended March 31, 2025, the RMS segment reported intersegment revenue of $2,994 and $4,266, respectively, related to sales to the DSA segment. The table below presents revenue, operating (loss) income and other results of operations by reportable segment for the three and six months ended March 31, 2026 and 2025. The segment information below has been recast for the three and six months ended March 31, 2025 to align with the presentation for the three and six months ended March 31, 2026.
Three Months Ended
March 31,		Six Months Ended
March 31,
2026202520262025
Revenue
DSA:
Service revenue$45,608 $44,096 $92,038 $85,939 
Product revenue1,475 1,236 3,000 2,215 
RMS:
Service revenue12,839 12,032 26,130 23,746 
Product revenue57,730 66,959 117,363 132,299 
Total revenue$117,652 $124,323 $238,531 $244,199 
Measure of Segment Operating Income
DSA:
Revenue$47,083 $45,332 $95,038 $88,154 
Cost of revenue (excluding depreciation and amortization of intangible assets)35,771 35,369 70,373 66,181 
Selling, general and administrative expenses4,888 4,604 9,697 9,193 
Other segment operating expenses357 341 675 674 
DSA segment operating income$6,067 $5,018 $14,293 $12,106 
RMS:
Revenue$70,569 $78,991 $143,493 $156,045 
Cost of revenue (excluding depreciation and amortization of intangible assets)57,232 59,963 118,699 123,989 
Selling, general and administrative expenses4,191 3,470 8,589 7,060 
Other segment operating expenses— — — — 
RMS segment operating income$9,146 $15,558 $16,205 $24,996 
Reconciliation of segment operating income to loss before income taxes
Total segment operating income$15,213 $20,576 $30,498 $37,102 
Unallocated corporate expenses (1)16,443 14,156 31,275 30,266 
Depreciation and amortization of intangible assets14,081 13,824 27,872 28,003 
Startup costs754 558 1,485 1,117 
Restructuring costs451 1,009 637 1,233 
2025 cybersecurity incident costs1,733 — 2,631 — 
Other special segment items (2)1,060 (6,033)2,237 (5,072)
Operating loss$(19,309)$(2,938)$(35,639)$(18,445)
Interest expense(14,063)(13,446)(27,526)(27,284)
Other expense(371)408 (594)(55)
Loss before income taxes$(33,743)$(15,976)$(63,759)$(45,784)

(1) Unallocated corporate expenses include salaries and benefits costs, stock-based compensation expense, corporate legal fees, consolidated audit fees, other professional fees, general product and liability insurance and corporate IT costs, and exclude depreciation. During the three and six months ended March 31, 2026, $1,204 and $2,586, respectively, of non-cash stock-based compensation expense was reflected in unallocated corporate expenses. During the three and six months ended March 31, 2025, $1,435 and $3,205, respectively, of non-cash stock-based compensation expense was reflected in unallocated corporate expenses.
(2) Other special segment items for the three and six months ended March 31, 2026 primarily relate to third party and legal fees associated with the Resolution Agreement and Plea Agreement (as defined in Note 11 - Contingencies and Commitments). Other special segment items for the three and six months ended March 31, 2025 primarily relate to the proceeds received in connection with the settlement agreement with Freese and Nichols, Inc. (the “Settlement Agreement”), which offset costs incurred to dispose of excess wastewater during previous years in addition to attorneys’ fees in previous years and fiscal year 2025.

Capital expenditures and depreciation and amortization of intangible assets by reportable segment are as follows:
Three Months Ended
March 31,		Six Months Ended
March 31,
2026202520262025
Depreciation and amortization: 
DSA$4,200 $4,516 $8,546 $9,099 
RMS9,667 9,150 18,917 18,588 
  Unallocated Corporate214 158 409 316 
 $14,081 $13,824 $27,872 $28,003 
 
Capital expenditures:
DSA$924 1,105 $1,884 $1,481 
RMS1,179 4,368 5,399 8,451 
 $2,103 $5,473 $7,283 $9,932 

Geographic Information

The following represents revenue originating in entities physically located in the identified geographic area:

Three Months Ended
March 31,		Six Months Ended
March 31,
2026202520262025
United States$103,680 $112,151 $207,389 $209,550 
Netherlands6,368 4,603 16,306 20,437 
Other7,604 7,569 14,836 14,212 
$117,652 $124,323 $238,531 $244,199 

Long-lived assets shown below include property and equipment, net. The following represents long-lived assets where they are physically located:

March 31,September 30,
20262025
United States$156,486 $160,343 
Netherlands6,690 7,038 
Other12,518 13,345 
$175,694 $180,726