| Note 7 - Accounts Payable, Accrued Liabilities and Other | 9 Months Ended | ||
|---|---|---|---|
| Sep. 30, 2020 | |||
| Notes to Financial Statements | |||
| Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] | 
 Accounts payable as of   September 30, 2020 and  December 31, 2019 includes an aggregate of $in both periods due to related parties for director fees. Accrued liabilities and other as of 65,000  September 30, 2020 and  December 31, 2019 includes an aggregate of $676,000and $925,000,respectively, due to related parties for accrued bonuses, termination costs, and employer contributions to the 401(k) Plan. | 
| X | ||||||||||
| 
- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. No definition available. 
 | 
| X | ||||||||||
| 
- References No definition available. 
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