Deferred Revenue - Summary of Deferred Revenue Activity (Details) - USD ($) $ in Thousands	5 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Jul. 31, 2017
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	$ 2,561	$ 2,495	$ 2,600
Cash Received NIH		1,000
Converted to Equity		(1,600)
Recognized as revenue	(66)	(683)	(39)
Balance at end of period	2,495	1,212	2,561
NIH Grant
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	0	0	0
Cash Received NIH		1,000
Converted to Equity		0
Recognized as revenue	0	(432)	0
Balance at end of period	0	568	0
BED
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	961	895	1,000
Cash Received NIH		0
Converted to Equity		0
Recognized as revenue	(66)	(251)	(39)
Balance at end of period	895	644	961
Other Opioid Treatments
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	1,600	1,600	1,600
Cash Received NIH		0
Converted to Equity		(1,600)
Recognized as revenue	0	0	0
Balance at end of period	$ 1,600	$ 0	$ 1,600