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Segment Information - Operating Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |
Total sales | $ 55,219 | $ 64,647
Operating (loss) income | (1,872) | 1,870
Interest expense | (235) | (262)
Interest income | 2,047 | 1,460
Stock compensation expense | (1,579) | (1,126)
Total assets | 69,436 | 65,904
Capital expenditures | (196) | (226)
Depreciation and amortization | (298) | (358)
HPP |  |
Segment Reporting Information [Line Items] |  |
Total sales | 4,154 | 6,873
Operating (loss) income | (4,845) | (2,708)
Interest expense | (16) | (12)
Interest income | 38 | 20
Stock compensation expense | (774) | (463)
Total assets | 9,554 | 10,467
Capital expenditures | (137) | (75)
Depreciation and amortization | (99) | (112)
TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 51,065 | 57,774
Operating (loss) income | 2,973 | 4,578
Interest expense | (219) | (250)
Interest income | 2,009 | 1,440
Stock compensation expense | (805) | (663)
Total assets | 59,882 | 55,437
Capital expenditures | (59) | (151)
Depreciation and amortization | (199) | (246)
Product |  |
Segment Reporting Information [Line Items] |  |
Total sales | 36,793 | 47,149
Product | HPP |  |
Segment Reporting Information [Line Items] |  |
Total sales | 2,599 | 5,475
Product | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 34,194 | 41,674
Service |  |
Segment Reporting Information [Line Items] |  |
Total sales | 18,426 | 17,498
Service | HPP |  |
Segment Reporting Information [Line Items] |  |
Total sales | 1,555 | 1,398
Service | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 16,871 | 16,100
U.S | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 50,211 | 56,752
Operating (loss) income | 3,247 | 4,642
Interest expense | (219) | (250)
Interest income | 1,791 | 1,263
Stock compensation expense | (805) | (663)
Total assets | 52,002 | 48,076
Capital expenditures | (59) | (151)
Depreciation and amortization | (199) | (246)
U.S | Product | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 33,600 | 40,940
U.S | Service | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 16,611 | 15,812
United Kingdom | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 854 | 1,022
Operating (loss) income | (274) | (64)
Interest expense | 0 | 0
Interest income | 218 | 177
Stock compensation expense | 0 | 0
Total assets | 7,880 | 7,361
Capital expenditures | 0 | 0
Depreciation and amortization | 0 | 0
United Kingdom | Product | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | 594 | 734
United Kingdom | Service | TS |  |
Segment Reporting Information [Line Items] |  |
Total sales | $ 260 | $ 288

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