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Summary of Interest Expense (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Short-term Debt [Line Items] |  |  |  |  |  |
Amortization of debt discounts |  |  | $ 1,533,537 | $ 4,899,625 | $ 6,607,212 | $ 4,545,675
Total accrued and noncash converted interest |  |  |  |  | 9,244,324 | 3,065,633
Total cash paid interest expense |  |  |  |  | 645,681 | 2,852,262
Total interest expense | $ 2,512,637 | $ 4,253,180 | $ 7,695,317 | $ 12,169,315 | 16,497,217 | 10,463,570
Term Note [Member] |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |
Amortization of debt discounts |  |  |  |  | 554,693 |
Total accrued and noncash converted interest |  |  |  |  | 747,453 |
12% Convertible Debentures [Member] |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |
Amortization of debt discounts |  |  |  |  | 3,880,609 | 3,304,893
Total accrued and noncash converted interest |  |  |  |  | 2,116,281 | 1,831,130
12% Second Amended Senior Secured Note [Member] |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |
Amortization of debt discounts |  |  |  |  | 2,171,910 | 1,240,782
Total accrued and noncash converted interest |  |  |  |  | 6,374,746 | 1,228,709
Total cash paid interest expense |  |  |  |  |  | 2,351,904
Promissory Note [Member] |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |
Total accrued and noncash converted interest |  |  |  |  | 5,844 | 5,794
Total cash paid interest expense |  |  |  |  |  | 983
Other [Member] |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |
Total cash paid interest expense |  |  |  |  | $ 645,681 | $ 499,375

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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