Revenue - Summary of Gross-To-Net ("GTN") Adjustments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Product revenue, gross	$ 500
Adjustments To prior period accruals
Product revenue, net	5,027	$ 9,481	$ 9,656
Collaboration revenue - Upfront payment
Disaggregation of Revenue [Line Items]
Product revenue, gross	484	2,173
GTN accruals
Chargebacks and cash discounts	16	48
Medicaid and Medicare rebates	52	223
Other returns, rebates, discounts and adjustments	115	364
Total GTN accruals	(183)	(635)
Product revenue	301	1,538
Adjustments To prior period accruals
Returns reserve & GTN accrual adjustments	(421)
GTN accrual adjustments	228
Product revenue, net	$ 108	$ 1,538
XENLETA
Adjustments To prior period accruals
Percentage of inventory held	50.00%