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Subsequent event - Additional Information (Details) - USD ($) | Mar. 22, 2023 | Mar. 19, 2023 | Dec. 28, 2022 | Oct. 01, 2022
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Series S Convertible Preferred Stock |  |  |  |
Subsequent Event [Line Items] |  |  |  |
fair Value of the Shares |  |  | 100,000 |
fair market value |  |  | $ 14,500,000 |
Asset Purchase Agreement |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Common Stock, par value |  |  |  | $ 0.032
Subsequent Event | Series S Convertible Preferred Stock | Soin Therapeutics L L C Member |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Business combination, description |  |  | Dr. Soin may convert up to three million dollars of value of the Series S Stock into shares of the Company's common stock commencing one year from the closing and may convert up to an additional $10 million of value of the Series S Stock into shares of the Company's common stock from and after the sooner of (y) the issuance by the FDA of New Drug Approval for low-dose naltrexone for treating pain or (z) 10 years from the closing. Further, during the 10-year period following the closing, Dr. Soin may convert up to an additional $17 million of value at a rate of five percent of the gross revenues that the Company receives in connection with sales or license revenue from the product.In connection with the merger, the Company employed an independent third-party firm to assess the fair value of the 100,000 shares of Series S Stock issued. The assessment determined that the fair market value of the Series S Stock was approximately $14.5 million, which was allocated to the intellectual property acquired. |
Subsequent Event | Sti Merger Sub Inc | Soin Therapeutics L L C Member |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Common stock, shares outstanding, percentage |  |  | 4.99% |
Subsequent Event | Sti Merger Sub Inc | Series S Convertible Preferred Stock | Soin Therapeutics L L C Member |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 200,000 |
Preferred stock, par value |  |  | $ 300.00 |
Stock issued during period, shares, acquisition |  |  | 100,000 |
Stock issued during period, value, acquisition |  |  | $ 13,000,000 |
Stock issued during period, additional value, acquisitions |  |  | 17,000,000 |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  |  | 30,000,000 |
Subsequent Event | Stock Conversion1 | Series S Convertible Preferred Stock | Soin Therapeutics L L C Member |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of stock, amount converted |  |  | 3,000,000 |
Subsequent Event | Stock Conversion2 | Series S Convertible Preferred Stock | Soin Therapeutics L L C Member |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of stock, amount converted |  |  | 10,000,000 |
Subsequent Event | Stock Conversion3 | Series S Convertible Preferred Stock | Soin Therapeutics L L C Member |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of stock, amount converted |  |  | $ 17,000,000 |
Subsequent Event | Stock Purchase Agreement | Subsidiaries |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Reduction in liabilities |  | $ 17,600,000 |  |
Advance payment |  | 1,000,000 |  |
Proceeds for equity |  | $ 1,000 |  |
Stock purchase agreement description |  | Each monthly payment is to be the greater of (a) $140,000 (or $100,000 for each January and February during the 15-year payment period) or (b) a monthly percentage-based payment, which is an amount calculated as follows: (i) 5% of the Subsidiaries’ aggregate gross revenues up to $2,000,000 for the relevant month, plus (ii) 4% of the Subsidiaries’ aggregate gross revenues between $2,000,000 and $3,000,000 for the relevant month, plus (iii) 3% of the Subsidiaries aggregate gross revenues over $3,000,000 for the relevant month. |  |
Subsequent Event | Stock Purchase Agreement | Subsidiaries | Maximum |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Proceeds from subsidiaries |  | $ 24,000,000.0 |  |
Subsequent Event | Securities Purchase Agreement |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Common stock offering shares | 361,000 |  |  |
Common Stock, par value | $ 0.001 |  |  |
Common stock purchase price per share | $ 1.17 |  |  |
Proceeds from sale of common stock | $ 422,000 |  |  |

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