Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT AND COMMON STOCK WARRANT LIABILITY - Covenants (Details)

v3.19.1
LONG-TERM DEBT AND COMMON STOCK WARRANT LIABILITY - Covenants (Details) - Senior secured notes due 2024 - Senior Secured Notes
$ in Millions
Dec. 31, 2018
USD ($)
Line of Credit Facility [Line Items]  
Cash and cash equivalents, allowed to deduct from adjusted EBITDA to debt ratio $ 15
December 31, 2018  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 5.25
March 31, 2019  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 5.00
June 30, 2019  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 5.00
September 30, 2019  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.75
December 31, 2019  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.75
March 31, 2020  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.50
June 30, 2020  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.50
September 30, 2020  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.25
December 31, 2020  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.25
March 31, 2021  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.25
June 30, 2021  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.25
September 30, 2021 and the last day of each fiscal quarter thereafter  
Line of Credit Facility [Line Items]  
Maximum Total Leverage Ratio 4.00