Discontinued Operations - Summary of major classes of assets and liabilities and operating results of IIU (Detail) - IIU Inc. [Member] - Stock Purchase Agreement [Member] - USD ($)		12 Months Ended
Jan. 16, 2019	Dec. 31, 2020
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain on disposal of discontinued operations	$ 16,428	$ 16,428
Net gain (loss) from discontinued operations		16,428
Net cash (used in) provided by investing activities		$ (246,914)

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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