Note 12 - Business Segment Information (Details Textual)
|3 Months Ended||9 Months Ended|
Dec. 31, 2019
Sep. 30, 2020
|Number of Reportable Segments||1||2|
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef