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Note 12 - Segment Reporting - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Revenue from external customers | $ 49,903,000 | $ 48,793,000 |  |  | $ 132,547,000 | $ 119,933,000
Revenue from internal customers (Clearfield, Inc.) | 0 | 0 |  |  | 0 | 0
Net investment income | 1,588,000 | 1,735,000 |  |  | 4,920,000 | 5,653,000
Interest expense | 106,000 | 153,000 |  |  | 275,000 | 381,000
Depreciation and amortization | 1,917,000 | 1,910,000 |  |  | 5,766,000 | 5,481,000
Stock based compensation | 1,313,000 | 1,152,000 |  |  | 3,740,000 | 3,437,000
Income tax expense (benefit) | 1,372,000 | (277,000) |  |  | 1,401,000 | (3,311,000)
Net income (loss) | 1,606,000 | (447,000) | $ 1,606,000 | $ (447,000) | 1,028,000 | (11,626,000)
Capital expenditures | 407,000 | 1,221,000 |  |  | 4,480,000 | 5,608,000
Intersegment Eliminations [Member] |  |  |  |  |  |
Revenue from external customers | 0 | 0 |  |  | 0 | 0
Revenue from internal customers (Clearfield, Inc.) | (262,000) | (389,000) |  |  | (1,226,000) | (1,490,000)
Net investment income | (58,000) | (64,000) |  |  | (179,000) | (179,000)
Interest expense | (58,000) | (60,000) |  |  | (179,000) | (177,000)
Depreciation and amortization | 0 | 0 |  |  | 0 | 0
Stock based compensation | 0 | 0 |  |  | 0 | 0
Income tax expense (benefit) | 0 | 0 |  |  | 0 | 0
Net income (loss) | 96,000 | 195,000 |  |  | 299,000 | 72,000
Capital expenditures | 0 | 0 |  |  | 0 | 0
Clearfield [Member] | Operating Segments [Member] |  |  |  |  |  |
Revenue from external customers | 38,755,000 | 33,670,000 |  |  | 109,074,000 | 89,371,000
Revenue from internal customers (Clearfield, Inc.) | 0 | 0 |  |  | 0 | 0
Net investment income | 1,646,000 | 1,799,000 |  |  | 5,099,000 | 5,832,000
Interest expense | 0 | 0 |  |  | 0 | 0
Depreciation and amortization | 1,581,000 | 1,535,000 |  |  | 4,763,000 | 4,383,000
Stock based compensation | 1,196,000 | 1,080,000 |  |  | 3,417,000 | 3,242,000
Income tax expense (benefit) | 787,000 | (249,000) |  |  | 1,562,000 | (2,657,000)
Net income (loss) | 2,219,000 | (478,000) |  |  | 4,064,000 | (8,862,000)
Capital expenditures | 406,000 | 1,115,000 |  |  | 2,796,000 | 4,207,000
Nestor Cables [Member] | Operating Segments [Member] |  |  |  |  |  |
Revenue from external customers | 11,148,000 | 15,123,000 |  |  | 23,473,000 | 30,562,000
Revenue from internal customers (Clearfield, Inc.) | 262,000 | 389,000 |  |  | 1,226,000 | 1,490,000
Net investment income | 0 | 0 |  |  | 0 | 0
Interest expense | 164,000 | 213,000 |  |  | 454,000 | 558,000
Depreciation and amortization | 336,000 | 375,000 |  |  | 1,003,000 | 1,098,000
Stock based compensation | 117,000 | 72,000 |  |  | 323,000 | 195,000
Income tax expense (benefit) | 585,000 | (28,000) |  |  | (161,000) | (654,000)
Net income (loss) | (709,000) | (164,000) |  |  | (3,335,000) | (2,836,000)
Capital expenditures | $ 1,000 | $ 106,000 |  |  | $ 1,684,000 | $ 1,401,000

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