Quarterly report pursuant to Section 13 or 15(d)

Note 13 - Related Party Transactions (Details Textual)

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Note 13 - Related Party Transactions (Details Textual) - Stellartech Research Corporation [Member] - USD ($)
3 Months Ended 123 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Stock Issued During Period, Shares, New Issues (in shares)     375
Related Party Transaction, Amounts of Transaction $ 282,000 $ 1,489,000  
Accounts Payable, Related Parties, Current $ 323,000   $ 124,000