Note 12 - Related Party Transactions (Tables)
|12 Months Ended|
Dec. 31, 2018
|Long-lived Assets by Geographic Areas [Table Text Block]||
Tabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds assets.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef