Note 6 - Derivative Liability (Tables)
|3 Months Ended|
Mar. 31, 2021
|Derivative Liability [Abstract]|
|Fair value assumptions||
Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef