Leases (Narrative) (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) item	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Finance Lease, Weighted Average Discount Rate, Percent	5.56%	5.56%
Finance Lease, Weighted Average Remaining Lease Term	1 year	1 year
Operating Lease, Weighted Average Discount Rate, Percent	5.17%	5.17%
Operating Lease, Weighted Average Remaining Lease Term	2 years 8 months 12 days	2 years 8 months 12 days
Incremental borrowing rates terms, discount rates		5 years
Operating Lease, Payments | $		$ 924
Restructuring Charges | $	$ 1,171	1,171
ROU asset | $	3,421	3,421	$ 4,372
Lease liability | $	3,631	$ 3,631
Minnesota [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		3
Minnesota [Member] | Lease Expiration In 2022 [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		2
Minnesota [Member] | Lease Expiration In 2023 [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		1
California [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		1
Illinois [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		1
Singapore [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		2
Indonesia [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		1
ROU asset | $	103	$ 103
Lease liability | $	$ 72	$ 72
Germany [Member]
Lessee, Lease, Description [Line Items]
Number of leased facilities		1
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year	1 year
Lessee, Operating Lease, Renewal Term	1 year	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	5 years	5 years
Lease Modification Costs [Member]
Lessee, Lease, Description [Line Items]
Restructuring Charges | $	$ 326	$ 326
Percent of square footage reduced		65.00%