Segment Information (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	2
Revenue, net	$ 1,407	$ 1,263
Cost of revenue		1,207
Cost of revenue	1,269
Research and development	9,444	19,643
General and administrative	6,200	7,464
Loss from operations	(15,506)	(27,051)
Loss from discontinued operations	(258)	(10,284)
Dermatology Therapeutics Segment
Segment Reporting Information [Line Items]
Revenue, net	218
Research and development	9,545	19,740
Loss from operations	(9,327)	(19,740)
Loss from discontinued operations	(257)	(9,415)
Contract Research Segment
Segment Reporting Information [Line Items]
Revenue, net	3,407	5,190
Cost of revenue		5,037
Cost of revenue	3,386
General and administrative	753	531
Loss from operations	(732)	(378)
Corporate and Other
Segment Reporting Information [Line Items]
Revenue, net	(2,218)	(3,927)
Cost of revenue		(3,830)
Cost of revenue	(2,117)
Research and development	(101)	(97)
General and administrative	5,447	6,933
Loss from operations	(5,447)	(6,933)
Loss from discontinued operations	(1)	(869)
Intersegment Eliminations \| Contract Research Segment
Segment Reporting Information [Line Items]
Revenue, net	$ (2,218)	$ (3,927)

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