Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	$ 196,202,000	$ 218,440,000
Net Revenue	100.00%	100.00%
Deferred Revenue	$ 3,112,000		$ 3,516,000
Product
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	$ 191,724,000	$ 213,771,000
Net Revenue	98.00%	98.00%
Service
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	$ 4,478,000	$ 4,669,000
Net Revenue	2.00%	2.00%
Europe (EMEA)
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	$ 112,775,000	$ 120,968,000
Europe (EMEA) | Product
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	109,844,000	117,685,000
Europe (EMEA) | Service
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	2,931,000	3,283,000
North America (NA)
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	75,974,000	86,971,000
North America (NA) | Product
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	75,702,000	86,764,000
North America (NA) | Service
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	272,000	207,000
All Other
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	7,453,000	10,501,000
All Other | Product
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	6,178,000	9,322,000
All Other | Service
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net Sales	$ 1,275,000	$ 1,179,000
General Terms and Conditions
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract Type Sales Split	30.00%
Large National Customers
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract Type Sales Split	30.00%
Government Tenders
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract Type Sales Split	21.00%
Other Customers
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract Type Sales Split	19.00%