Long-Term Debt and Other Financing Arrangements - Schedule of Long-term Debt (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2013	May 31, 2013
Principal Amount
Total Debt	$ 399,862,000	$ 528,371,000
Less: Current Portion	0	0
Long-Term Debt	399,862,000	528,371,000
Unamortized Discount and Deferred Financing Costs
Total Debt	43,822,000	64,195,000
Less: Current Portion	0	0
Long-Term Debt	43,822,000	64,195,000
Carrying Value
Total Debt	356,040,000	464,176,000
Less: Current Portion	0	0
Long-Term Debt	356,040,000	464,176,000
Facility Agreement
Principal Amount
Total Debt	190,084,000	190,361,000
Unamortized Discount and Deferred Financing Costs
Total Debt	9,237,000	10,185,000
Carrying Value
Total Debt	180,847,000	180,176,000
Second Lien Term Loan Facility
Principal Amount
Total Debt	208,368,000	201,495,000
Unamortized Discount and Deferred Financing Costs
Total Debt	34,585,000	35,448,000
Carrying Value
Total Debt	173,783,000	166,047,000
Loan Agreement with Thermo
Principal Amount
Total Debt	0	135,105,000
Unamortized Discount and Deferred Financing Costs
Total Debt	0	18,562,000
Carrying Value
Total Debt	$ 0	116,543,000
8.00% Convertible Senior Notes Issued in 2013
Debt Instrument [Line Items]
Loan interest rate, percentage	8.00%		8.00%	8.00%
Principal Amount
Total Debt	$ 1,410,000	1,410,000		$ 54,600,000.0
Unamortized Discount and Deferred Financing Costs
Total Debt	0	0
Carrying Value
Total Debt	$ 1,410,000	$ 1,410,000