Contractual Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contract Research And Development [Member]
Schedule of Contractual Agreements [Line Items]
Other Research and Development Expense	$ 6.8	$ 5.4
Abbott Products, Inc. [Member] | Collaborative Arrangement [Member]
Schedule of Contractual Agreements [Line Items]
Collaborative Arrangement, Royalties, Maximum Amount	$ 1.0
Collaborative Arrangement, Royalties, Percentage of Reduction	50.00%
Collaborative Arrangement, Royalties, Percentage of Net Sales	1.00%