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Note 1 - Organization and Operations (Details Textual)
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Feb. 28, 2021
USD ($)
Number of Subsidiaries   2  
Revenue from Contract with Customer, Excluding Assessed Tax, Total $ 173,000 $ 108,000  
Net Income (Loss) Attributable to Parent, Total (18,193,000) (25,762,000)  
Cash and Cash Equivalents, at Carrying Value, Ending Balance $ 8,137,000 $ 6,533,000  
LiNiCo [Member]      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners     10.00%
LiNiCo [Member] | Maximum [Member]      
Equity Securities without Readily Determinable Fair Value, Amount     $ 2,000,000