Customer Concentration Customer Concentration - Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Depomed [Member]
Concentration Risk [Line Items]
Receivables from Customers	$ 3,176	$ 0
Cardinal [Member]
Concentration Risk [Line Items]
Receivables from Customers	1,071	2,732
Mckesson [Member]
Concentration Risk [Line Items]
Receivables from Customers	1,311	2,352
ABC [Member]
Concentration Risk [Line Items]
Receivables from Customers	$ 823	$ 4,330