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Revenue Participation Rights - Additional Information (Detail) | 1 Months Ended | 6 Months Ended
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Feb. 28, 2011 USD ($) | Jun. 30, 2021 USD ($) Investment Project $ / Security shares
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue |  | $ 3,818,750
Revenue participation agreement |  | $ 15,000,000.0
"Seattle" Project [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Percentage of revenue owed to certificate holder per each million invested |  | 1.00%
Common shares issued per unit | shares |  | 100,000
Galt Resources, LLC [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Percentage of revenue owed to certificate holders |  | 50.00%
Percentage of revenue owed to certificate holder per each million invested |  | 1.00%
Investment multiplier in case of project success | Investment |  | 3
Projects after bifurcation | Project |  | 2
Galt Resources, LLC [Member] | SS Gairsoppa [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue |  | $ 3,756,250
Galt Resources, LLC [Member] | Maximum [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Investment for future revenue rights | $ 7,512,500 |
HMS Victory Project [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Percentage of revenue owed to certificate holders |  | 7.5125%
Revenue Participation Certificates [Member] | "Seattle" Project [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Revenue participation certificates per unit value | $ / Security |  | 50,000

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 + Details
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