Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Stockholders' Equity (Details Textual)

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Note 12 - Stockholders' Equity (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
Jan. 31, 2022
Mar. 31, 2022
Mar. 31, 2021
Proceeds from Issuance of Common Stock   $ 3,890,000 $ 7,485,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)   0 0
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 44,780    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value $ 50,000    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)   0  
ATM [Member]      
Stock Issued During Period, Shares, New Issues (in shares)   3,397,999  
Proceeds from Issuance of Common Stock   $ 3,900,000  
Management and Employees [Member]      
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)   1,099,177  
Board Members [Member]      
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)   20,471