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Financial instruments (Tables) | 12 Months Ended
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Dec. 31, 2013
Investments, All Other Investments [Abstract] |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] | The following table presents the Company’s fair value hierarchy for assets and liabilities measured at fair value as of December 31, 2013 and 2012:
|  | December 31, 2013 |
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Recurring |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable securities |  | $ | 8,587,475 |  | $ | - |  | $ | - |  | $ | 8,587,475 |
Nonrecurring |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in affiliate |  | $ | - |  | $ | - |  | $ | 6,623,448 |  | $ | 6,623,448 |
|  | December 31, 2012 |
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Recurring |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable securities |  | $ | 8,570,338 |  | $ | - |  | $ | - |  | $ | 8,570,338 |
Nonrecurring |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in affiliate |  | $ | - |  | $ | - |  | $ | 6,925,346 |  | $ | 6,925,346 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | A reconciliation of the beginning and ending balances for Level 3 investments for the year ended December 31, 2013:
Balance as of December 31, 2012 |  | $ | 6,925,346 |
Profit sharing and equity from earnings of OC-BVI |  |  | 1,337,352 |
Distribution of earnings from OC-BVI |  |  | (1,439,250) |
Impairment of Investment in OC-BVI (See Note 8) |  |  | (200,000) |
Balance as of December 31, 2013 |  | $ | 6,623,448 |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a,b,bb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=25499696&loc=SL7498348-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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