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Income Taxes (Schedule of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets: |  |
Accruals not currently deductible | $ 9,778,184 | $ 12,823,493
Research and development costs | 58,501,232 | 49,099,538
Stock based compensation | 14,670,250 | 13,707,737
Other | 4,722,513 | 2,118,484
Total deferred income tax assets | 87,672,179 | 77,749,252
Liabilities: |  |
Excess tax over book depreciation | (3,460,485) | (20,728,577)
Goodwill | (42,580,026) | (37,999,022)
Intangible assets | (13,268,772) | (11,718,904)
Other | (2,834,196) | (2,507,071)
Total deferred income tax liabilities | (62,143,479) | (72,953,574)
Net deferred income taxes | 25,528,700 | $ 4,795,678
Patent, and Other Assets, Net |  |
Liabilities: |  |
Net deferred income taxes | $ 25,528,700 |

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