Summary of significant accounting policies - Impairment of Long-lived Assets (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Accounting Policies [Abstract] | ||
| Energy production asset impairment | $ 524,972 | |
| Energy production reversal of unfavorable contract liability | (478,411) | |
| Patent applications abandonment | 205,345 | |
| Long-lived asset impairment | $ 251,906 | $ 0 |
| X | ||||||||||
- Definition Abandonment of Patent Applications No definition available.
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| X | ||||||||||
- Definition Impairment of Long-Lived Production Assets Held-for-use No definition available.
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| X | ||||||||||
- Definition Reversal of Unfavorable Contract Liability No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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