Strategic Research Collaboration (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Apr. 30, 2019	Jun. 30, 2019	Jan. 31, 2019
Collaboration Agreement [Abstract]
Funding in strategic research collaboration		$ 3,500
Percentage of funding due upon execution of the agreement		40.00%
Initial funding due upon the execution of the agreement		$ 1,400
Funding in Strategic Research Collaboration Upon Execution of Agreement Remaining Amount		$ 2,100
Accrued funding in strategic research collaboration			$ 1,400
Milestone payment made during period	$ (1,400)