Revenue Recognition (Schedule of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues from contract with customer	$ 7,334	$ 7,919	$ 5,361	$ 6,112	$ 5,435	$ 6,867	$ 7,066	$ 6,867	$ 26,726	$ 26,235
North and South America [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer									14,566	13,969
Europe, Middle East, and Africa [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer									11,112	9,157
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenues from contract with customer									$ 1,048	$ 3,109
Customer Concentration Risk [Member] | Revenues [Member]
Disaggregation of Revenue [Line Items]
Concentration risk percentage									100.00%	100.00%
Customer Concentration Risk [Member] | Revenues [Member] | Military [Member]
Disaggregation of Revenue [Line Items]
Concentration risk percentage									65.00%	75.00%
Customer Concentration Risk [Member] | Revenues [Member] | Commercial, including Industrial and Medical [Member]
Disaggregation of Revenue [Line Items]
Concentration risk percentage									12.00%	10.00%
Customer Concentration Risk [Member] | Revenues [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Concentration risk percentage									4.00%	6.00%
Customer Concentration Risk [Member] | Revenues [Member] | Multiple [Member]
Disaggregation of Revenue [Line Items]
Concentration risk percentage									19.00%	9.00%