Annual report pursuant to Section 13 and 15(d)

Note 12 - Segment Reporting - Reconciliation of Revenue from Segments to Consolidated (Details)

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Note 12 - Segment Reporting - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($)
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Revenue from external customers $ 270,883,000 $ 140,755,000 $ 93,075,000
Revenue from internal customers (Clearfield, Inc.) 182,000    
Net investment income 328,000    
Interest Expense 311,000    
Depreciation and amortization 3,413,000 2,302,000 2,422,000
Stock based compensation 2,339,000 1,280,000 774,000
Income taxes 14,472,000 5,407,000 1,862,000
Net Income (loss) 49,362,000 20,327,000 $ 7,293,000
Capital Expenditures 8,500,000    
Goodwill 6,402,000 4,709,000  
Total Assets 229,128,000 $ 125,911,000  
Clearfield [Member]      
Revenue from external customers 263,822,000    
Revenue from internal customers (Clearfield, Inc.) 0    
Net investment income 327,000    
Interest Expense 141,000    
Depreciation and amortization 3,174,000    
Stock based compensation 2,339,000    
Income taxes 14,258,000    
Net Income (loss) 49,771,000    
Capital Expenditures 8,487,000    
Goodwill 4,709,000    
Total Assets 198,255,000    
Nestor Cables [Member]      
Revenue from external customers 7,061,000    
Revenue from internal customers (Clearfield, Inc.) 182,000    
Net investment income 1,000    
Interest Expense 170,000    
Depreciation and amortization 239,000    
Stock based compensation 0    
Income taxes 214,000    
Net Income (loss) (409,000)    
Capital Expenditures 13,000    
Goodwill 1,693,000    
Total Assets $ 30,873,000