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Note 19 - Subsequent Events (Details Textual)							1 Months Ended
	Apr. 22, 2024 USD ($)	Apr. 19, 2024 USD ($)	Apr. 18, 2024 USD ($)	Mar. 27, 2024 USD ($)	Jan. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)
Term Sheet With Major Commercial Banking Institution [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 26,000,000	$ 26,000,000
Line of Credit Facility, Maximum Borrowing Amount, Percent of the Vessel's Market Value for Financing						67.00%	67.00%
Proceeds from Issuance of Debt						$ 26,000,000
Debt Instrument, Number of Consecutive Quarterly Installments							28
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid						$ 10,400,000	$ 10,400,000
Term Sheet With Major Commercial Banking Institution [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate							2.15%
Term Sheet With Major Commercial Banking Institution [Member] | Forecast [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 45,000,000		$ 22,000,000
Line of Credit Facility, Maximum Borrowing Amount, Percent of the Vessel's Market Value for Financing			55.00%
Proceeds from Issuance of Debt		$ 22,000,000
Debt Instrument, Number of Consecutive Quarterly Installments	40		20
Debt Instrument, Periodic Payment, Total	$ 562,500		$ 300,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 22,500,000		$ 16,000,000
Term Sheet With Major Commercial Banking Institution [Member] | Forecast [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.95%		2.10%
M/V “Tender Soul” [Member] | Subsequent Event [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total					$ 27,000,000
M/V EM Astoria [Member] | Subsequent Event [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total				$ 10,000,000
Gain (Loss) on Disposition of Property Plant Equipment, Total				$ 6,000,000

X

- Definition

Represents number of consecutive quarterly installments for debt instrument.

+ References

No definition available.

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X

- Definition

The percent of market value of vessel for financing that is the maximum borrowing amount for a line of credit facility.

+ References

No definition available.

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X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
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X

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

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X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
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-SubTopic 10
-Topic 230
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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
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-Publisher FASB
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X

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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