Balance Sheet Account Detail - Schedule of Amounts Presented in Accounts Payable and Other Accrued Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Commercial/Medicaid Rebates and Government Chargebacks
Accounts Payable and Other Liabilities [Roll Forward]
Beginning balance	$ 14,671	$ 22,952
Add: GTN accruals recorded for product sales	0	7,702
(Less): Payments made and credits against GTN accruals	(803)	(15,983)
Ending balance	13,868	14,671
Distribution, Data, Inventory and GPO Administrative Fees
Accounts Payable and Other Liabilities [Roll Forward]
Beginning balance	1,138	3,932
Add: GTN accruals recorded for product sales	0	1,209
(Less): Payments made and credits against GTN accruals	(196)	(4,003)
Ending balance	942	1,138
Product Return Allowances
Accounts Payable and Other Liabilities [Roll Forward]
Beginning balance	4,714	5,171
Add: GTN accruals recorded for product sales	0	167
(Less): Payments made and credits against GTN accruals	(241)	(624)
Ending balance	$ 4,473	$ 4,714