Note 10 - Convertible Note (Details Textual) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Jan. 24, 2019 |
May 24, 2016 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Repayments of Convertible Debt | $ (0) | $ 6,651,000 | ||
| Amortization of Debt Issuance Costs | $ 607,000 | $ 56,000 | ||
| Convertible Note Payable 11% [Member] | ||||
| Debt Instrument, Interest Rate, Stated Percentage | 11.00% | |||
| Debt Instrument, Convertible, Remaining Discount Amortization Period (Year) | 3 years | |||
| Interstate Battery, Convertible Note, Due January 2019 [Member] | ||||
| Repayments of Convertible Debt | $ 6,700,000 | |||
| Amortization of Debt Discount (Premium) | 2,600,000 | |||
| Amortization of Debt Issuance Costs | $ 20,000 | |||
| X | ||||||||||
- 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of amortization expense attributable to debt issuance costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash outflow from the repayment of a long-term debt 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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