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Financial Instruments and Fair Value Disclosures (Carrying and FV) (Details) - USD ($)	Dec. 31, 2019	Mar. 31, 2019
Fair value
Carrying Value	$ 650,273,417	$ 696,090,786
Corsair Japanese Financing
Fair value
Carrying Value	44,958,333	47,395,833
Corsair Japanese Financing | Level 2
Fair value
Fair Value	47,063,504	45,901,900
Concorde Japanese Financing
Fair value
Carrying Value	49,538,462	51,961,538
Concorde Japanese Financing | Level 2
Fair value
Fair Value	52,040,924	50,176,288
Corvette Japanese Financing
Fair value
Carrying Value	50,076,923	52,500,000
Corvette Japanese Financing | Level 2
Fair value
Fair Value	52,630,327	50,671,689
CJNP Japanese Financing
Fair value
Carrying Value	19,420,625	20,506,250
CJNP Japanese Financing | Level 2
Fair value
Fair Value	20,712,784	20,918,881
CMNL Japanese Financing
Fair value
Carrying Value	18,418,899	19,446,131
CMNL Japanese Financing | Level 2
Fair value
Fair Value	19,843,518	19,862,056
CNML Japanese Financing
Fair value
Carrying Value	20,612,351	21,666,369
CNML Japanese Financing | Level 2
Fair value
Fair Value	$ 22,236,801	$ 22,137,090

X

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

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+ References

No definition available.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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