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Note 12 - Segment Reporting - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Revenue from external customers | $ 48,793,000 | $ 61,284,000 | $ 119,933,000 | $ 219,035,000
Revenue from internal customers (Clearfield, Inc.) | 0 | 0 | 0 | 0
Net investment income | 1,735,000 | 1,630,000 | 5,653,000 | 3,328,000
Interest expense | 153,000 | 195,000 | 381,000 | 551,000
Depreciation and amortization | 1,910,000 | 1,579,000 | 5,481,000 | 4,411,000
Stock based compensation | 1,152,000 | 1,059,000 | 3,437,000 | 2,504,000
Income tax benefit | (277,000) | 1,842,000 | (3,311,000) | 8,511,000
Net income (loss) | (447,000) | 5,218,000 | (11,626,000) | 29,837,000
Capital expenditures | 1,221,000 | 1,729,000 | 5,608,000 | 6,531,000
Intersegment Eliminations [Member] |  |  |  |
Revenue from external customers | 0 | 0 | 0 | 0
Revenue from internal customers (Clearfield, Inc.) | (389,000) | (1,869,000) | (1,490,000) | (4,792,000)
Net investment income | (64,000) | (56,000) | (179,000) | (56,000)
Interest expense | (60,000) | (56,000) | (177,000) | (56,000)
Depreciation and amortization | 0 | 0 | 0 | 0
Stock based compensation | 0 | 0 | 0 | 0
Income tax benefit | 0 | 0 | 0 | 0
Net income (loss) | 195,000 | (713,000) | 72,000 | (1,299,000)
Capital expenditures | 0 | 0 | 0 | 0
Clearfield [Member] | Operating Segments [Member] |  |  |  |
Revenue from external customers | 33,670,000 | 47,856,000 | 89,371,000 | 186,662,000
Revenue from internal customers (Clearfield, Inc.) | 0 | 0 | 0 | 0
Net investment income | 1,799,000 | 1,685,000 | 5,832,000 | 3,379,000
Interest expense | 0 | 0 | 0 | 170,000
Depreciation and amortization | 1,535,000 | 1,208,000 | 4,383,000 | 3,316,000
Stock based compensation | 1,080,000 | 1,041,000 | 3,242,000 | 2,486,000
Income tax benefit | (249,000) | 1,659,000 | (2,657,000) | 8,305,000
Net income (loss) | (478,000) | 5,150,000 | (8,862,000) | 30,263,000
Capital expenditures | 1,115,000 | 1,472,000 | 4,207,000 | 5,961,000
Nestor Cables [Member] | Operating Segments [Member] |  |  |  |
Revenue from external customers | 15,123,000 | 13,428,000 | 30,562,000 | 32,373,000
Revenue from internal customers (Clearfield, Inc.) | 389,000 | 1,869,000 | 1,490,000 | 4,792,000
Net investment income | 0 | 1,000 |  | 5,000
Interest expense | 213,000 | 252,000 | 558,000 | 437,000
Depreciation and amortization | 375,000 | 371,000 | 1,098,000 | 1,096,000
Stock based compensation | 72,000 | 18,000 | 195,000 | 18,000
Income tax benefit | (28,000) | 183,000 | (654,000) | 206,000
Net income (loss) | (164,000) | 781,000 | (2,836,000) | 873,000
Capital expenditures | $ 106,000 | $ 258,000 | $ 1,401,000 | $ 570,000

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