Grants and Awards (Narrative) (Details) - USD ($)			3 Months Ended
	Jul. 15, 2020	Mar. 13, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Award [Line Items]
Revenue from grants			$ 1,066,000
Award receivable			1,125,000		$ 561,000
Medical Technology Enterprise Consortium [Member]
Award [Line Items]
Revenue from grants	$ 15,000,000
Cystic Fibrosis Foundation [Member]
Award [Line Items]
Award receivable		$ 1,000,000
Award agreement interruption period		360 days
Research and development credits recognized			$ 0	$ 0
Maximum [Member] | Cystic Fibrosis Foundation [Member]
Award [Line Items]
Amount of threshold development award		$ 5,000,000