Operating Leases (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) ft² renewal_option	Dec. 31, 2018 USD ($)
Operating Leased Assets [Line Items]
Rent expense	$ 1,000,000.0	$ 1,300,000
Weighted average remaining term for operating leases	6 years 1 month 9 days
Weighted average discount rate applied to operating leases	5.70%
Cash paid for amounts included in the measurement of operating lease liabilities	$ 635,000
Incentives from landlord recorded as leasehold improvements	783,000
Increase in operating lease liabilities for right of use assets	$ 70,000
SINGAPORE
Operating Leased Assets [Line Items]
Mixed office and warehouse facility, square footage | ft²	19,805
Golden Valley [Member] | MINNESOTA
Operating Leased Assets [Line Items]
Mixed office and warehouse facility, square footage | ft²	61,208
Period for recognizing rental expense (in years)	91 months
Renewal options, number | renewal_option	1
Renewal options, term (in years)	3 years