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Former Chief Executive Officer Succession Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 4 Months Ended 6 Months Ended
Dec. 31, 2019
Feb. 05, 2019
Dec. 31, 2018
Sep. 30, 2018
Nov. 04, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense     $ 117   $ 429    
Consulting fees   $ 975          
Chief Executive Officer Succession Plan expense, net              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense $ 0   117     $ 0 $ 429
Consulting fees     650       650
Chief Executive Officer Succession Plan expense, net | Long Term Incentive Plan 2016-2018 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Reversal of previously accrued amounts       $ (5,065)      
CEO [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Cash separation payment     $ 9,080   34,295   $ 33,051
Continuation costs         $ 208