Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Share-based Compensation and Cash-based Incentive Compensation - Summary of Compensation Expense Related to Share-Based Awards and Cash-Based Awards (Details)

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Note 8 - Share-based Compensation and Cash-based Incentive Compensation - Summary of Compensation Expense Related to Share-Based Awards and Cash-Based Awards (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based compensation expense $ 1,019 $ 1,259 $ 2,067 $ 1,181
Total charged to operating income 1,178 2,904 6,706 4,798
General and Administrative Expense [Member]        
Share-based compensation expense 1,019 1,259 2,067 1,181
Cash-based incentive compensation [1] 159 1,243 3,790 3,338
Lease Operating Expense [Member]        
Cash-based incentive compensation [1] $ 0 $ 402 $ 849 $ 279
[1] Includes adjustments of accruals to actual payments.