Note 8 - Accounts Payable, Accrued Liabilities and Other  | 
9 Months Ended | ||
|---|---|---|---|
Sep. 30, 2019  | |||
| Notes to Financial Statements | |||
| Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] | 
 Accounts payable at  
 September 30, 2019  includes an aggregate of $65,000  due to related parties for director fees. Accrued liabilities and other at  September 30, 2019  and  December 31, 2018  includes an aggregate of $317,000  and $1.6  million, respectively, due to related parties for accrued termination costs, bonuses and director fees. | 
| 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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