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Related Party Transactions - Additional Information (Detail) |  | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 09, 2002 Directors | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | May 26, 1998
Related Party Transaction [Line Items] |  |  |  |  |
Post finance cost proceeds | 5.00% |  |  |  | 5.00%
Deep Sea Mineral Company, CIC, LLC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable |  |  | $ 954,764 |  |
Receivable to be paid in cash |  |  | 202,097 |  |
Option to convert receivable to equity |  |  | 752,667 |  |
Back Office Technical and Support Services [Member] | Deep Sea Mineral Company, CIC, LLC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable |  |  | 731,746 |  |
Monaco [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivables |  |  | 612,498 | $ 183,453 |
Operating payable |  |  | 233,855 | $ 200,801 |
Lease amount |  | $ 20,080 |  |  |
Revenue recognized from related party transaction |  |  | $ 2,200,000 |  |
Georgia LLC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Post finance cost proceeds | 5.00% |  |  |  |
Directors' interest in ownership of Company | 58.00% |  |  |  |
Officers and directors owning an interest in the limited liability | Directors | 2 |  |  |  |

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