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Leases - The Company as Lessee - Schedule of company's lease expenses and sub-lease income (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Charter Hire Expenses [Member] |  |  |  |
Lease expense for chartered-in contracts 12 months or less |  |  |  | $ 4,708,988
Lease expense for chartered-in contracts greater than 12 months |  |  | $ 318,606 | 1,560,000
Total charter hire expenses |  |  | 318,606 | 6,268,988
General and Administrative Expense [Member] |  |  |  |
Lease expense for office leases |  | $ 97,726 | 90,121 | 87,192
Revenue [member] |  |  |  |
Sub lease income from chartered-in contracts greater than 12 months | [1] |  | $ 860,227 | $ 3,091,390
[1] | The sub-lease income represents only time charter revenue earned on the chartered-in contracts greater than 12 months. There is additional revenue of $482,879 earned from voyage charters on the same chartered-in contract which is recorded in Revenues in our consolidated statement of operations for the year ended December 31, 2019 (2020 & 2021: nil). Additionally, there is revenue earned from time charters from chartered-in contracts 12 months or less which is included in Revenues in our consolidated statements of operations for the year ended December 31, 2019. No such contracts existed for the s ended December 31, 2020 and 2021.

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- Definition Sale Type Minimum Lease Payments Transactions Within Two Years. + References No definition available. + Details
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- Definition Total Sale Type Minimum Lease Payments Transactions Within Two Years. + References No definition available. + Details
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- Definition Amount of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123418715&loc=d3e50824-112756 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Details
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- Details
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