Collaborative Arrangements and Licensing Agreements, Bayer (Details) - Bayer [Member] - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2019	Sep. 30, 2019
Collaborative Arrangement and Licensing Agreement [Abstract]
Cumulative payments received		$ 175
Next prospective milestone		$ 20
Subsequent Event [Member]
Collaborative Arrangement and Licensing Agreement [Abstract]
Milestone payment earned	$ 10