Deferred Revenue - Summary of Deferred Revenue Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	$ 2,495
Converted to Equity	(1,600)
Increase to deferred revenue	500
Recognized as revenue	(333)
Balance at end of period	1,062
BED
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	895
Converted to Equity	0
Increase to deferred revenue	0
Recognized as revenue	(170)
Balance at end of period	725
Other Opioid Treatments
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	1,600
Converted to Equity	(1,600)
Increase to deferred revenue	0
Recognized as revenue	0
Balance at end of period	0
Grants
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	0
Converted to Equity	0
Increase to deferred revenue	500
Recognized as revenue	(163)
Balance at end of period	$ 337