Note 9 - Earnings (Loss) Per Share (Tables)
|6 Months Ended|
Jun. 30, 2018
|Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]||
Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef