Note 3 - Business Combinations (Tables)
|3 Months Ended|
Mar. 31, 2021
|Schedule of Business Acquisitions, by Acquisition [Table Text Block]||
Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef