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Note 6 - Long-term Debt - Schedule of Convertible Note Payable (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Convertible note payable, less current portion $ 3,964,273 $ 6,186,936  
Convertible Debt [Member]      
Convertible note 15,960,000   $ 0
Less: unamortized debt issuance costs (1,915,726)   0
Convertible note payable 14,044,274   0
Current portion of convertible note payable 10,080,000   0
Convertible note payable, less current portion $ 3,964,273   $ 0