Deferred Revenue - Summary of Deferred Revenue Activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	$ 2,495
Recognized as revenue	(54)
Balance at end of period	2,441
OORT
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	0
Recognized as revenue	0
Balance at end of period	0
BED
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	895
Recognized as revenue	(54)
Balance at end of period	841
Other Opioid Treatments
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	1,600
Recognized as revenue	0
Balance at end of period	$ 1,600