Note 16 - Financial Instruments - Recurring Fair Value Measurements (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Interest rate swap contracts, current	$ 0	$ 1,142,682
Interest rate swap contracts, noncurrent	0	2,669,244
Derivatives	0	1,142,682
Derivatives	168,138	0
Fair Value, Recurring [Member]
Interest rate swap contracts, current	56,042	1,142,682
Interest rate swap contracts, noncurrent	168,138
Derivatives	56,042	1,142,682
Derivatives		2,669,244
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Interest rate swap contracts, current	0	0
Interest rate swap contracts, noncurrent	0
Derivatives	0	0
Derivatives		0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Interest rate swap contracts, current	56,042	1,142,682
Interest rate swap contracts, noncurrent	168,138
Derivatives	56,042	1,142,682
Derivatives		2,669,244
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Interest rate swap contracts, current	0	0
Interest rate swap contracts, noncurrent	0
Derivatives	$ 0	0
Derivatives		$ 0

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483466/210-20-50-3

+ Details

Name:	us-gaap_DerivativeAssetsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

+ Details

Name:	us-gaap_DerivativeAssetsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

+ Details

Name:	us-gaap_DerivativeLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: