Annual report pursuant to Section 13 and 15(d)

Note 5 - Investment in Limited Liability Company (Details Textual)

v3.20.4
Note 5 - Investment in Limited Liability Company (Details Textual)
12 Months Ended
Aug. 08, 2017
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Income (Loss) from Equity Method Investments, Total   $ (383,000) $ (627,000)
InControl Medical [Member]      
Equity Method Investment, Ownership Percentage   7.00%  
Income (Loss) from Equity Method Investments, Total   $ 383,000 $ 627,000
InControl Medical [Member] | Membership Unit Subscription Agreement [Member]      
Unrecorded Unconditional Purchase Obligation, Period Quantity Purchased   485 300
Unrecorded Unconditional Purchase Obligation, Purchases   $ 51,000 $ 26,000
Payments for Purchase of Products   52,000 27,000
Accounts Payable, Related Parties, Current   $ 0 $ 0
Payments to Acquire Equity Method Investments $ 2,500,000