The amount of other investment funds that released during the period.

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Note 12 - Subsequent Events (Details Textual) - USD ($)	1 Months Ended		6 Months Ended
Note 12 - Subsequent Events (Details Textual) - USD ($)	Sep. 30, 2017	Aug. 31, 2017	Jun. 30, 2017	Jun. 30, 2016
Payments to Acquire Property, Plant, and Equipment			$ 11,518,463	$ 23,080,296
Subsequent Event [Member]
Other Investment Funds Released	$ 4,000,000
Subsequent Event [Member] \| Euromar LLC [Member]
Business Acquisition, Percentage of Voting Interests Acquired	85.714%
Subsequent Event [Member] \| Euromar LLC [Member] \| M/V EM Athens, M/V EM Oinousses, M/V EM Corfu, and M/V Akinada Bridge [Member]
Payments to Acquire Property, Plant, and Equipment	$ 25,000,000
Subsequent Event [Member] \| Interest Rate Swap [Member]
Derivative, Term of Contract		5 years
Derivative Liability, Notional Amount		$ 5,000,000
Subsequent Event [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR), Year 1 [Member]
Derivative, Variable Interest Rate		1.40%
Subsequent Event [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR), Year 2 [Member]
Derivative, Variable Interest Rate		1.75%
Subsequent Event [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR), Year 3 [Member]
Derivative, Variable Interest Rate		1.85%
Subsequent Event [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR), Year 4 [Member]
Derivative, Variable Interest Rate		2.32%
Subsequent Event [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR), Year 5 [Member]
Derivative, Variable Interest Rate		2.32%