Segment Information - Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024
Segment Reporting Information [Line Items]
Segment Reporting, CODM			srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used			allocates resources and assesses performance against the Company’s strategies and budgets. It is also consistent with how we manage the business and view the markets we serve.
Total sales	$ 15,448	$ 13,105	$ 44,265	$ 42,186
Operating (loss) income	(1,223)	(720)	(2,571)	171
Interest expense	(105)	(55)	(259)	(150)
Interest income	440	523	1,343	1,497
Total assets	66,784	66,804	66,784	66,804	$ 69,436
Capital expenditures	(66)	(45)	(120)	(179)
Depreciation and amortization	(65)	(74)	(187)	(228)
High Performance Products Segment
Segment Reporting Information [Line Items]
Total sales	384	579	1,461	3,793
Operating (loss) income	(1,829)	(1,628)	(5,068)	(2,707)
Interest expense	(3)	(4)	(8)	(11)
Interest income	10	15	12	27
Total assets	11,488	10,574	11,488	10,574
Capital expenditures	(10)	(7)	(13)	(125)
Depreciation and amortization	(18)	(24)	(56)	(77)
Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	15,064	12,526	42,804	38,393
Operating (loss) income	606	908	2,497	2,878
Interest expense	(102)	(51)	(251)	(139)
Interest income	430	508	1,331	1,470
Total assets	55,296	56,230	55,296	56,230
Capital expenditures	(56)	(38)	(107)	(54)
Depreciation and amortization	(47)	(50)	(131)	(151)
Product
Segment Reporting Information [Line Items]
Total sales	10,150	7,845	29,717	27,710
Product | High Performance Products Segment
Segment Reporting Information [Line Items]
Total sales	12	20	367	2,535
Product | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	10,138	7,825	29,350	25,175
Service
Segment Reporting Information [Line Items]
Total sales	5,298	5,260	14,548	14,476
Service | High Performance Products Segment
Segment Reporting Information [Line Items]
Total sales	372	559	1,094	1,258
Service | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	4,926	4,701	13,454	13,218
U.S. | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	14,903	12,347	41,984	37,712
Operating (loss) income	678	956	2,684	2,979
Interest expense	(102)	(51)	(251)	(139)
Interest income	388	453	1,197	1,307
Total assets	46,994	48,610	46,994	48,610
Capital expenditures	(56)	(38)	(107)	(54)
Depreciation and amortization	(47)	(50)	(131)	(151)
U.S. | Product | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	10,088	7,701	28,750	24,678
U.S. | Service | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	4,815	4,646	13,234	13,034
United Kingdom | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	161	179	820	681
Operating (loss) income	(72)	(48)	(187)	(101)
Interest expense	0	0	0	0
Interest income	42	55	134	163
Total assets	8,302	7,620	8,302	7,620
Capital expenditures	0	0	0	0
Depreciation and amortization	0	0	0	0
United Kingdom | Product | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	50	124	600	497
United Kingdom | Service | Technology Solutions Segment
Segment Reporting Information [Line Items]
Total sales	$ 111	$ 55	$ 220	$ 184