Segment Information - Operating Segments (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Sep. 30, 2025 |
|
| Segment Reporting Information [Line Items] | |||||
| Reportable Segments | 2 | ||||
| Segment Reporting, CODM [Extensible Enumeration] | srt:ChiefExecutiveOfficerMember | ||||
| Total sales | $ 14,398,000 | $ 15,448,000 | $ 42,446,000 | $ 44,265,000 | |
| Total cost of sales | 10,065,000 | 10,995,000 | 28,906,000 | 31,041,000 | |
| Gross Profit | 4,333,000 | 4,453,000 | 13,540,000 | 13,224,000 | |
| Research and development | 832,000 | 791,000 | 2,508,000 | 2,340,000 | |
| Selling, general and administrative | 5,043,000 | 4,885,000 | 13,537,000 | 13,455,000 | |
| Total operating expenses | 5,875,000 | 5,676,000 | 16,045,000 | 15,795,000 | |
| Operating (loss) income | (1,542,000) | (1,223,000) | (2,505,000) | (2,571,000) | |
| Interest expense | (182,000) | (105,000) | (477,000) | (259,000) | |
| Interest income | 524,000 | 440,000 | 1,652,000 | 1,343,000 | |
| Depreciation and amortization | (36,000) | (65,000) | (166,000) | (187,000) | |
| Cash and cash equivalents | 24,666,000 | 26,308,000 | 24,666,000 | 26,308,000 | $ 27,418,000 |
| Accounts receivable, net of allowance | 11,356,000 | 13,453,000 | 11,356,000 | 13,453,000 | 12,000,000 |
| Financing receivables, net of allowance | 16,543,000 | 6,938,000 | 16,543,000 | 6,938,000 | 14,904,000 |
| Total assets | 70,781,000 | 66,784,000 | 70,781,000 | 66,784,000 | $ 71,163,000 |
| Capital expenditures | 0 | (66,000) | (119,000) | (120,000) | |
| High Performance Products Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 423,000 | 384,000 | 1,624,000 | 1,461,000 | |
| Total cost of sales | 207,000 | 260,000 | 616,000 | 751,000 | |
| Gross Profit | 216,000 | 124,000 | 1,008,000 | 710,000 | |
| Research and development | 832,000 | 791,000 | 2,508,000 | 2,340,000 | |
| Selling, general and administrative | 1,062,000 | 1,162,000 | 3,139,000 | 3,439,000 | |
| Total operating expenses | 1,894,000 | 1,953,000 | 5,647,000 | 5,779,000 | |
| Operating (loss) income | (1,678,000) | (1,829,000) | (4,639,000) | (5,069,000) | |
| Interest expense | (4,000) | (3,000) | (11,000) | (8,000) | |
| Interest income | 2,000 | 10,000 | 3,000 | 12,000 | |
| Depreciation and amortization | (3,000) | (18,000) | (39,000) | (56,000) | |
| Cash and cash equivalents | 124,000 | 48,000 | 124,000 | 48,000 | |
| Accounts receivable, net of allowance | 120,000 | 177,000 | 120,000 | 177,000 | |
| Financing receivables, net of allowance | 0 | 0 | 0 | 0 | |
| Total assets | 12,236,000 | 11,488,000 | 12,236,000 | 11,488,000 | |
| Capital expenditures | 0 | (10,000) | (3,000) | (13,000) | |
| Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 13,975,000 | 15,064,000 | 40,822,000 | 42,804,000 | |
| Total cost of sales | 9,858,000 | 10,735,000 | 28,290,000 | 30,290,000 | |
| Gross Profit | 4,117,000 | 4,329,000 | 12,532,000 | 12,514,000 | |
| Research and development | 0 | 0 | 0 | 0 | |
| Selling, general and administrative | 3,981,000 | 3,723,000 | 10,398,000 | 10,016,000 | |
| Total operating expenses | 3,981,000 | 3,723,000 | 10,398,000 | 10,016,000 | |
| Operating (loss) income | 136,000 | 606,000 | 2,134,000 | 2,498,000 | |
| Interest expense | (178,000) | (102,000) | (466,000) | (251,000) | |
| Interest income | 522,000 | 430,000 | 1,649,000 | 1,331,000 | |
| Depreciation and amortization | (33,000) | (47,000) | (127,000) | (131,000) | |
| Cash and cash equivalents | 24,542,000 | 26,260,000 | 24,542,000 | 26,260,000 | |
| Accounts receivable, net of allowance | 11,236,000 | 13,276,000 | 11,236,000 | 13,276,000 | |
| Financing receivables, net of allowance | 16,543,000 | 6,938,000 | 16,543,000 | 6,938,000 | |
| Total assets | 58,545,000 | 55,296,000 | 58,545,000 | 55,296,000 | |
| Capital expenditures | 0 | (56,000) | (116,000) | (107,000) | |
| Product | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 9,943,000 | 10,150,000 | 27,757,000 | 29,717,000 | |
| Total cost of sales | 7,890,000 | 8,553,000 | 22,570,000 | 24,551,000 | |
| Product | High Performance Products Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 148,000 | 12,000 | 421,000 | 367,000 | |
| Total cost of sales | 40,000 | 44,000 | 56,000 | 167,000 | |
| Product | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 9,795,000 | 10,138,000 | 27,336,000 | 29,350,000 | |
| Total cost of sales | 7,850,000 | 8,509,000 | 22,514,000 | 24,384,000 | |
| Service | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 4,455,000 | 5,298,000 | 14,689,000 | 14,548,000 | |
| Total cost of sales | 2,175,000 | 2,442,000 | 6,336,000 | 6,490,000 | |
| Service | High Performance Products Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 275,000 | 372,000 | 1,203,000 | 1,094,000 | |
| Total cost of sales | 167,000 | 216,000 | 560,000 | 584,000 | |
| Service | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 4,180,000 | 4,926,000 | 13,486,000 | 13,454,000 | |
| Total cost of sales | 2,008,000 | 2,226,000 | 5,776,000 | 5,906,000 | |
| U.S. | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 13,947,000 | 14,903,000 | 40,684,000 | 41,984,000 | |
| Total cost of sales | 9,844,000 | 10,666,000 | 28,225,000 | 29,668,000 | |
| Gross Profit | 4,103,000 | 4,237,000 | 12,459,000 | 12,316,000 | |
| Research and development | 0 | 0 | 0 | 0 | |
| Selling, general and administrative | 3,668,000 | 3,559,000 | 9,885,000 | 9,631,000 | |
| Total operating expenses | 3,668,000 | 3,559,000 | 9,885,000 | 9,631,000 | |
| Operating (loss) income | 435,000 | 678,000 | 2,574,000 | 2,685,000 | |
| Interest expense | (178,000) | (102,000) | (466,000) | (251,000) | |
| Interest income | 489,000 | 388,000 | 1,548,000 | 1,197,000 | |
| Depreciation and amortization | (33,000) | (47,000) | (127,000) | (131,000) | |
| Cash and cash equivalents | 19,473,000 | 22,379,000 | 19,473,000 | 22,379,000 | |
| Accounts receivable, net of allowance | 11,164,000 | 12,233,000 | 11,164,000 | 12,233,000 | |
| Financing receivables, net of allowance | 16,543,000 | 6,938,000 | 16,543,000 | 6,938,000 | |
| Total assets | 53,311,000 | 46,994,000 | 53,311,000 | 46,994,000 | |
| Capital expenditures | 0 | (56,000) | (116,000) | (107,000) | |
| U.S. | Product | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 9,781,000 | 10,088,000 | 27,253,000 | 28,750,000 | |
| Total cost of sales | 7,836,000 | 8,461,000 | 22,449,000 | 23,832,000 | |
| U.S. | Service | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 4,166,000 | 4,815,000 | 13,431,000 | 13,234,000 | |
| Total cost of sales | 2,008,000 | 2,205,000 | 5,776,000 | 5,836,000 | |
| United Kingdom | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 28,000 | 161,000 | 138,000 | 820,000 | |
| Total cost of sales | 14,000 | 69,000 | 65,000 | 622,000 | |
| Gross Profit | 14,000 | 92,000 | 73,000 | 198,000 | |
| Research and development | 0 | 0 | 0 | 0 | |
| Selling, general and administrative | 313,000 | 164,000 | 513,000 | 385,000 | |
| Total operating expenses | 313,000 | 164,000 | 513,000 | 385,000 | |
| Operating (loss) income | (299,000) | (72,000) | (440,000) | (187,000) | |
| Interest expense | 0 | 0 | 0 | 0 | |
| Interest income | 33,000 | 42,000 | 101,000 | 134,000 | |
| Depreciation and amortization | 0 | 0 | 0 | 0 | |
| Cash and cash equivalents | 5,069,000 | 3,881,000 | 5,069,000 | 3,881,000 | |
| Accounts receivable, net of allowance | 72,000 | 1,043,000 | 72,000 | 1,043,000 | |
| Financing receivables, net of allowance | 0 | 0 | 0 | 0 | |
| Total assets | 5,234,000 | 8,302,000 | 5,234,000 | 8,302,000 | |
| Capital expenditures | 0 | 0 | 0 | 0 | |
| United Kingdom | Product | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 14,000 | 50,000 | 83,000 | 600,000 | |
| Total cost of sales | 14,000 | 48,000 | 65,000 | 552,000 | |
| United Kingdom | Service | Technology Solutions Segment | |||||
| Segment Reporting Information [Line Items] | |||||
| Total sales | 14,000 | 111,000 | 55,000 | 220,000 | |
| Total cost of sales | $ 0 | $ 21,000 | $ 0 | $ 70,000 | |