Quarterly report pursuant to Section 13 or 15(d)

Note 14 - Related Party Transactions (Details Textual)

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Note 14 - Related Party Transactions (Details Textual) - Stellartech Research Corporation [Member] - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Stock Issued During Period, Shares, New Issues (in shares) 38    
Related Party Transaction, Amounts of Transaction $ 77,000 $ 282,000  
Due to Related Parties, Total $ 1,000   $ 9,000