Contigencies And Commitments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Selas SAS, Liabilities | $	$ 421
Rent expense | $	$ 1,300	$ 1,071	$ 1,304
Initial term	1 year
Remaining rentals payable, 2016 | $	$ 1,132
Remaining rentals payable, 2017 | $	517
Remaining rentals payable, 2018 | $	$ 407
Minnesota [Member] | Lease Expiration In 2016 [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
Minnesota [Member] | Lease Expiration In 2017 [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
California [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
Indonesia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of leased facilities	1
Minimum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Base salary term	10 months
Employment period	1 year
Maximum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Base salary term	2 years