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Debt (Details) - USD ($) | Dec. 11, 2015 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | $ 138,070,280 | $ 128,794,208
Less: current portion |  | (18,343,971) | (19,627,846)
Less: unamortized debt issuance and bank fees |  | (2,036,668) | (1,528,511)
Secured long-term debt |  | 117,689,641 | 107,637,851
Bulk Nordic Six Ltd. Loan Agreement [Domain] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 19,400,000 | 0
Bulk Freedom Loan Agreement [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 5,500,000 | 0
Bulk Pangaea Secured Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 0 | 1,040,625
Bulk Patriot Secured Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 0 | 1,087,500
Bulk Trident Secured Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 4,537,500 | 5,737,500
Bulk Juliana Secured Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 2,535,157 | 3,042,186
Bulk Nordic Odin, Bulk Nordic Olympic, Bulk Nordic Odyssey, Bulk Nordic Orion and Bulk Nordic Oshima Loan Agreement [Member] [Domain] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 73,575,000 | 77,325,001
Bulk Atlantic Secured Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 0 | 5,350,000
Bulk Phoenix Secured Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 5,616,663 | 6,816,685
Nordic Bulk Barents Ltd. and Nordic Bulk Bothnia Ltd. [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 6,445,640 | 7,097,820
Bulk Nordic Oasis Ltd. Loan Agreement [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 19,250,000 | 20,000,000
Long Wharf Construction to Term Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 977,267 | 1,032,067
mv Nordic Bulk Oasis [Member] | Primary Beneficiary |  |  |
Debt Instrument [Line Items] |  |  |
Ownership Percentage | 33.33% |  |
mv Nordic Bulk Oasis [Member] | Not Primary Beneficiary | ST Shipping and Transport Ltd. (STST) [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Ownership Percentage | 33.33% |  |
mv Nordic Bulk Oasis [Member] | Not Primary Beneficiary | ASO 2020 Maritime S.A. (ASO2020) [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Ownership Percentage | 33.33% |  |
PBC US LLC Automobile Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | 25,856 | 28,582
PBC US LLC Master Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Secured long-term debt, gross |  | $ 207,197 | $ 236,242

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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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