Revenue Concentrations, Significant Customers And Geographic Areas (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, Major Customer [Line Items]
Revenue, export sales percentage	85.00%	82.00%
Customer Concentration Risk | Sales Revenue, net | Significant Customer A
Revenue, Major Customer [Line Items]
Concentration risk percentage	20.00%
Customer Concentration Risk | Accounts Receivable | Significant Customer A
Revenue, Major Customer [Line Items]
Accounts receivable, net	$ 2,700,000
Customer Concentration Risk | Accounts Receivable | Significant Customer B
Revenue, Major Customer [Line Items]
Accounts receivable, net	3,300
Customer Concentration Risk | Accounts Receivable | Significant Customer C
Revenue, Major Customer [Line Items]
Accounts receivable, net	$ 3,200