Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands			6 Months Ended
	Jul. 24, 2020	Jan. 27, 2019	Jun. 30, 2020
Loss Contingencies [Line Items]
Percentage of royalty payable on net sales			15.00%
Guarantee, liability			$ 1,599
Guarantee from Armistice			1,594
Subsequent Event
Loss Contingencies [Line Items]
Bankruptcy claims, amount paid to settle claims	$ 800
Specialty Pharma
Loss Contingencies [Line Items]
Loss contingency, damages sought, value		$ 1,700
Serenity Pharmaceuticals, LLC | Subsequent Event
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	3,096
Minimum | Serenity Pharmaceuticals, LLC | Subsequent Event
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 50,000
Maximum
Loss Contingencies [Line Items]
Guarantee, liability			$ 10,300