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Related Party Transactions - Additional Information (Detail) - USD ($) | Mar. 31, 2020 | Sep. 30, 2019
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Deep Sea Mineral Company, CIC, LLC [Member] |  |
Related Party Transaction [Line Items] |  |
Accounts receivable | $ 230,871 |
Greg Stemm Past Chairman [Member] |  |
Related Party Transaction [Line Items] |  |
Earnest Deposit Fee Payable |  | $ 450,000

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