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FINANCIAL STATEMENT PRESENTATION - Ability to Continue as a Going Concern (Details)
Aug. 07, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Feb. 16, 2017
6.75% senior notes due 2025          
DEBT          
Interest rate (as a percent) 6.75% 6.75% 6.75% 6.75% 6.75%