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Loan Arrangement with Former Related Party - Additional Information (Detail) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 29, 2016 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2018
Related Party Transaction [Line Items] |  |  |  |
Common stock, shares outstanding |  | 211,787,573 |  | 187,029,967
Remaining debt amount |  | $ 70,020 |  | $ 72,089
Accrued interest due to related party |  | 2,002 |  | 6,835
Promissory notes |  | 70,020 |  | 72,089
The Mann Group LLC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Remaining debt amount |  |  | $ 70,100 | 72,100
Accrued interest due to related party |  |  |  | $ 6,800
Promissory notes |  | $ 70,000 |  |
The Mann Group LLC | Loan Arrangement |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Trustee substantial portion disposed term | 3 years |  |  |
Common stock, shares outstanding |  | 9,300,000 |  |
Additional common stock shares reserved for issuance |  | 14,000,000 |  |
The Mann Group LLC | Loan Arrangement | Common Stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Written notice period |  | 65 days |  |
The Mann Group LLC | Loan Arrangement | Maximum |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of common stock shares outstanding |  | 5.00% |  |
The Mann Group LLC | Loan Arrangement | Maximum | Common Stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of beneficially own in excess |  | 19.99% |  |
The Mann Group LLC | Loan Arrangement | Minimum | Common Stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of beneficially own in excess |  | 9.99% |  |
Mr.Mann | Loan Arrangement | Common Stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of beneficial interest owned | 36.00% |  |  |

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