Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Stockholders' Equity (Details Textual)

v3.21.2
Note 12 - Stockholders' Equity (Details Textual)
 1 Months Ended 3 Months Ended 6 Months Ended
Feb. 15, 2021
shares
May 31, 2021
USD ($)
shares
Feb. 28, 2021
USD ($)
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
shares
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)           825,540  
Stock Issued During Period, Value, Warrant Exercised | $       $ 0   $ 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)           347,901  
Proceeds from Issuance of Common Stock | $           $ 9,331,000 $ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)       0 0 0 0
Restricted Stock Units (RSUs) [Member] | February 2021 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     25,000        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value | $     $ 151,500        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)           0  
Restricted Stock Units (RSUs) [Member] | May 2021 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   81,883          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value | $   $ 235,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)           13,648  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Number of Installments   12          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   1 year          
LiNiCo [Member]              
Stock Issued During Period, Shares, Equity Method Invesment (in shares) 375,000         375,000  
Board Members [Member]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)           58,871  
First Cashless Exercise of Warrant [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       10,350   10,350  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 1.90   $ 1.90  
Second Cashless Exercise of Warrant [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       86,778   86,778  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 1.90   $ 1.90  
First Set of Common Stock Pursuant to Cashless Exercise of Warrant [Member]              
Share Price (in dollars per share) | $ / shares       3.95   $ 3.95  
Stock Issued During Period, Value, Warrant Exercised | $           $ 5,371  
Second Set of Common Stock Pursuant to Cashless Exercise of Warrant [Member]              
Share Price (in dollars per share) | $ / shares       $ 6.20   $ 6.20  
Stock Issued During Period, Value, Warrant Exercised | $           $ 60,219  
ATM [Member]              
Stock Issued During Period, Shares, New Issues (in shares)           2,473,359  
Proceeds from Issuance of Common Stock | $           $ 9,300,000