Note 7 - Accounting for Share-based Payment Arrangement Compensation	6 Months Ended
Jun. 30, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	(7) Accounting for Share-based Payment Arrangement Compensation We account for share-based payment arrangements in accordance with Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, 718, Compensation – Stock Compensation. During the first six months of 2020, there were no significant changes to the structure of our stock-based award plans. Pre-tax compensation expense related to stock options and performance unit awards recorded in the first six months of 2020 and 2019 was $972,000 and $1.0 million, respectively.

Note 7 - Accounting for Share-based Payment Arrangement Compensation

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Text Block]

(7) Accounting for Share-based Payment Arrangement Compensation

We account for share-based payment arrangements in accordance with Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, 718, Compensation – Stock Compensation. During the first six months of 2020, there were no significant changes to the structure of our stock-based award plans. Pre-tax compensation expense related to stock options and performance unit awards recorded in the first six months of 2020 and 2019 was $972,000 and $1.0 million, respectively.