Grants and Awards (Narrative) (Details) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 15, 2020	Mar. 13, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Award [Line Items]
Revenue from grants			$ 1,251,000	$ 288,000	$ 3,485,000	$ 319,000
Award receivable			1,251,000		1,251,000		$ 561,000
Medical Technology Enterprise Consortium [Member]
Award [Line Items]
Revenue from grants	$ 15,000,000.0
Cystic Fibrosis Foundation [Member]
Award [Line Items]
Award receivable		$ 1,000,000.0
Additional amount received			$ 800,000
Award agreement interruption period		360 days
Research and development credits recognized					$ 800,000	$ 1,000,000.0
Maximum [Member] | Cystic Fibrosis Foundation [Member]
Award [Line Items]
Amount of threshold development award		$ 5,000,000.0