Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Investment in Limited Liability Company (Details Textual)

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Note 4 - Investment in Limited Liability Company (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 21 Months Ended
Aug. 08, 2017
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Payments to Acquire Equity Method Investments     $ 2,500,000  
Income (Loss) from Equity Method Investments, Total     $ (539,000)  
InControl Medical [Member]          
Equity Method Investment, Ownership Percentage   9.00% 9.00%   9.00%
Income (Loss) from Equity Method Investments, Total   $ (132,000) $ (539,000)    
InControl Medical [Member] | Membership Unit Subscription Agreement [Member]          
Payments for Purchase of Products   $ 81,000     $ 224,000
Payments to Acquire Equity Method Investments $ 2,500,000   $ 2,500,000