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DEBT - Convertible Debt to Equity Conversion (Exchange Agreements) (Details) - USD ($) | May 07, 2021 | Nov. 04, 2021 | Sep. 30, 2021 | Sep. 03, 2021 | Aug. 19, 2021 | Jul. 26, 2021 | Jul. 22, 2021 | Sep. 30, 2020
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Preferred Stock Par value | $ 0.001 |  | $ 0.001 |  |  |  |  | $ 0.001
Warrants to acquire shares of common stock |  | 1,478,752 |  |  |  |  |  |
Threshold expiry period for right to purchase additional preferred stock from merger closing date | 12 months |  |  |  |  |  |  |
TDR Capital |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Convertible debt |  |  |  | $ 6,600,000 |  | $ 1,100,000 |  |
Digital Power Lending, LLC |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Convertible debt |  |  |  |  | $ 1,100,000 |  |  |
Debt financing |  |  |  |  |  |  | $ 2,420,000 |
MAI warrants |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Preferred Stock Par value | $ 0.001 |  |  | $ 0.001 | $ 0.001 | $ 0.001 | $ 0.001 |
Warrants to acquire shares of common stock | 3,717,898 |  |  |  |  |  |  |
MTI warrants |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Convertible debt | $ 10,762,500 |  |  |  |  |  |  |
Warrants to acquire shares of common stock | 42,759,290 |  |  |  |  |  |  |

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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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- Definition The portion of the carrying value of long-term convertible debt as of the balance sheet date that is scheduled to be repaid within one year or in the normal operating cycle if longer. Convertible debt is a financial instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs classified as current. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399 + Details
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