Revenue Recognition (Schedule of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	$ 7,311	$ 7,919	$ 21,742	$ 19,392
Military [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	5,836	5,118	16,363	13,398
Commercial, including Industrial and Medical [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	491	1,388	1,213	2,500
Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	0	206	2,023	952
Multiple [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	984	1,207	2,143	2,542
North and South America [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	4,246	4,355	11,963	10,608
Europe, Middle East, and Africa [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	2,408	3,359	7,330	7,838
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	$ 657	$ 205	$ 2,449	$ 946