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Fair Value Measurements (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Fair Value Disclosures [Abstract] |  |
Schedule of Warrant Derivative Liabilities | The following table presents the assumptions used for the warrant derivative liabilities under the Black-Scholes option-pricing model: Schedule of Warrant Derivative Liabilities
|  | As of September 30, 2021 |  |  | As of December 31, 2020 |
|  | Strome Warrants |  |  | B. Riley Warrants |  |  | Strome Warrants |  |  | B. Riley Warrants |
Expected life |  |  | 1.70 |  |  |  | 4.50 |  |  |  | 2.45 |  |  |  | 4.79 |
Risk-free interest rate |  |  | 0.28 | % |  |  | 0.76 | % |  |  | 0.13 | % |  |  | 0.36 | %
Volatility factor |  |  | 153.59 | % |  |  | 142.59 | % |  |  | 150.55 | % |  |  | 140.95 | %
Dividend rate |  |  | 0 | % |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Transaction date closing market price |  | $ | 0.38 |  |  | $ | 0.38 |  |  | $ | 0.60 |  |  | $ | 0.60 |
Exercise price |  | $ | 0.50 |  |  | $ | 0.33 |  |  | $ | 0.50 |  |  | $ | 0.33 |
Schedule of Valuation Activity for Warrants Accounted for Derivative Liability | The following table represents the carrying amounts and change in valuation for the Company’s warrants accounted for as a derivative liability and classified within Level 3 of the fair-value hierarchy: Schedule of Valuation Activity for Warrants Accounted for Derivative Liability
|  | As of and for the Nine Months Ended September 30, 2021 |  |  | As of and for the Nine Months Ended September 30, 2020 |
|  | Carry Amount at Beginning of Period |  |  | Change in Valuation |  |  | Carrying Amount at End of Period |  |  | Carry Amount at Beginning of Period |  |  | Change in Valuation |  |  | Carrying Amount at End of Period |
Strome Warrants |  | $ | 704,707 |  |  | $ | (339,924 | ) |  | $ | 364,783 |  |  | $ | 1,036,687 |  |  | $ | 63,160 |  |  | $ | 1,099,847 |
B. Riley Warrants |  |  | 443,188 |  |  |  | (156,888 | ) |  |  | 286,300 |  |  |  | 607,513 |  |  |  | 71,750 |  |  |  | 679,263 |
Total |  | $ | 1,147,895 |  |  | $ | (496,812 | ) |  | $ | 651,083 |  |  | $ | 1,644,200 |  |  | $ | 134,910 |  |  | $ | 1,779,110 |
| The following table represents the carrying amount, valuation and roll-forward of activity for the Company’s warrants accounted for as a derivative liability and classified within Level 3 of the fair-value hierarchy as of and for the years ended December 31, 2020 and 2019: Schedule of Valuation Activity for Warrants Accounted for Derivative Liability
|  | December 31, |
|  | 2020 |  |  | 2019 |
Carrying amount at beginning of year: |  |  |  |  |  |  |  |
L2 Warrants |  | $ | - |  |  | $ | 418,214 |
Strome Warrants |  |  | 1,036,687 |  |  |  | 587,971 |
B. Riley Warrants |  |  | 607,513 |  |  |  | 358,050 |
Subtotal carrying amount at beginning of year |  |  | 1,644,200 |  |  |  | 1,364,235 |
Change in valuation of warrant derivative liabilities: |  |  |  |  |  |  |  |
L2 Warrants |  |  | - |  |  |  | 316,972 |
Strome Warrants |  |  | (331,980 | ) |  |  | 448,716 |
B. Riley Warrants |  |  | (164,325 | ) |  |  | 249,463 |
Subtotal change in valuation during the year |  |  | (496,305 | ) |  |  | 1,015,151 |
Exercise of warrants during the year: |  |  |  |  |  |  |  |
L2 Warrants |  |  | - |  |  |  | 735,186 |
Carrying amount at end of year: |  |  |  |  |  |  |  |
Strome Warrants |  |  | 704,707 |  |  |  | 1,036,687 |
B. Riley Warrants |  |  | 443,188 |  |  |  | 607,513 |
Carrying amount at end of year |  | $ | 1,147,895 |  |  | $ | 1,644,200 |
Schedule of Fair Value of Financial Instruments |  | Financial instruments measured at fair value during the year consisted of the following as of December 31, 2020 and 2019: Schedule of Fair Value of Financial Instruments
|  | Year Ended December 31, 2020 |
|  | Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Long-term debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
12% Amended Senior Secured Notes |  | $ | 52,556,401 |  |  | $ | - |  |  | $ | 52,556,401 |  |  | $ | - |
Warrant derivative liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Strome Warrants |  | $ | 704,707 |  |  | $ | - |  |  | $ | - |  |  | $ | 704,707 |
B. Riley Warrants |  |  | 443,188 |  |  |  | - |  |  |  | - |  |  |  | 443,188 |
Total warrant derivative liabilities |  | $ | 1,147,895 |  |  | $ | - |  |  | $ | - |  |  | $ | 1,147,895 |
|  | Year Ended December 31, 2019 |
|  | Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Long-term debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
12% Amended Senior Secured Notes |  | $ | 44,009,745 |  |  | $ | - |  |  | $ | 44,009,745 |  |  | $ | - |
Warrant derivative liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Strome Warrants |  | $ | 1,036,687 |  |  | $ | - |  |  | $ | - |  |  | $ | 1,036,687 |
B. Riley Warrants |  |  | 607,513 |  |  |  | - |  |  |  | - |  |  |  | 607,513 |
Total warrant derivative liabilities |  | $ | 1,644,200 |  |  | $ | - |  |  | $ | - |  |  | $ | 1,644,200 |
Embedded derivative liabilities |  | $ | 13,501,000 |  |  | $ | - |  |  | $ | - |  |  | $ | 13,501,000 |
Schedule of Valuation Activity for the Embedded Conversion Feature Liability |  | The following table represents the carrying amount, valuation and a roll-forward of activity for the conversion option features, buy-in features, and default remedy features, as deemed appropriate for each instrument (collectively the embedded derivative liabilities), for the 12% Convertible Debentures (refer to Note 18) accounted for as embedded derivative liabilities and classified within Level 3 of the fair-value hierarchy as of and for the years ended December 31, 2020 and 2019: Schedule of Valuation Activity for the Embedded Conversion Feature Liability
|  | December 31, |
|  | 2020 |  |  | 2019 |
Recognition of embedded derivative liabilities (conversion feature, buy-in feature, and default remedy feature): |  |  |  |  |  |  |  |
Carrying amount at beginning of year |  | $ | 13,501,000 |  |  | $ | 7,387,000 |
Issuance date of March 18, 2019 |  |  | - |  |  |  | 822,000 |
Issuance date of March 27, 2019 |  |  | - |  |  |  | 188,000 |
Issuance date of April 8, 2019 |  |  | - |  |  |  | 64,000 |
Change in fair value of embedded derivative liabilities |  |  | (2,571,004 | ) |  |  | 5,040,000 |
Fair value of embedded derivative liabilities recorded within additional paid-capital upon conversion of 12% convertible debentures |  |  | (10,929,996 | ) |  |  | - |
Carrying amount at end of year |  | $ | - |  |  | $ | 13,501,000 |

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