Deferred Revenue (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2014	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2016	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Upfront payment						$ 4.0
Wanbang Biopharmaceutical
Deferred Revenue Arrangement [Line Items]
Distribution agreement term	10 years
Recognized deferred revenue		$ 0.1	$ 0.1	$ 0.2	$ 0.2
Deferred Revenue		3.0		3.0			$ 3.2
Baxter Healthcare Organization
Deferred Revenue Arrangement [Line Items]
Upfront payment	$ 20.0
Recognized deferred revenue		0.5	$ 0.5	1.5	$ 1.5
Deferred Revenue		$ 9.6		$ 9.6			$ 11.1
Deferred Revenue Benefit Percentage				25.00%
Partial Refund				$ 6.6