Note 2 - Revenue Recognition (Details Textual) - USD ($)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Related Party, CBOL Funding	$ 3,900,000
Professional and Contract Services Expense	171,459	$ 159,107
Contract with Customer, Liability, Revenue Recognized	$ 159,235	$ 164,927
A-CAM [Member]
Revenue, Contract Term	10 years
IOWA
Construction Contractor, Receivable, Excluding Contract Retainage	$ 596,084
MINNESOTA
Construction Contractor, Receivable, Excluding Contract Retainage	$ 8,354,481
Minimum [Member]
Revenue, Contract Term	3 years
Maximum [Member]
Revenue, Contract Term	10 years
Month-to-month and Other Contracted Revenue [Member] \| Revenue Benchmark [Member] \| Product Concentration Risk [Member]
Revenue, Percentage	71.47%	75.67%
Outside of the Scope of ASC 606 [Member] \| Revenue Benchmark [Member] \| Product Concentration Risk [Member]
Revenue, Percentage	25.55%	21.55%
Other Revenue [Member] \| Revenue Benchmark [Member] \| Product Concentration Risk [Member]
Revenue, Percentage	2.98%	2.78%
Product and Service, Other [Member] \| Minimum [Member]
Revenue, Contract Term	3 years
Product and Service, Other [Member] \| Maximum [Member]
Revenue, Contract Term	10 years

Amount of fund received from a related party for CBOL (Consumer Broadband-only Loop Support) during the period.

No definition available.

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- Definition

Represents the period in which revenue from customers will be recognized in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 910
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482546/910-10-50-6

+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

+ Details

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- Definition

Professional and contract service expense includes cost reimbursements for support services related to contracted projects, outsourced management, technical and staff support.

+ References

No definition available.

+ Details

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