Note 8 - Accounts Payable, Accrued Liabilities and Other (Details Textual) - USD ($) |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Executive Bonuses, Director Fees, Deferred Salary, and Scientific Advisory Board Fees [Member] | Accrued Liabilities and Other [Member] | ||
| Due to Related Parties, Current, Total | $ 184,000 | $ 1,600,000 |
| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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