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Deferred Income and Revenue Participation Rights (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred Revenue Arrangement [Line Items]
Revenue participation rights	$ 3,818,750	$ 3,818,750
"Seattle" Project [Member]
Deferred Revenue Arrangement [Line Items]
Revenue participation rights	62,500	62,500
Galt Resources, LLC (HMS Victory project) [Member]
Deferred Revenue Arrangement [Line Items]
Revenue participation rights	$ 3,756,250	$ 3,756,250

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(5))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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