Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill (Components Intangible Assets) (Details)

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Intangible Assets and Goodwill (Components Intangible Assets) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 15,730   $ 15,910
Accumulated amortization (5,400)   (4,878)
Net identifiable intangible assets $ 10,330   $ 11,032
Weighted-average useful lives (years) 9 years   9 years
Amortization of purchased intangibles $ 226 $ 199  
Customer Relationships      
Finite-Lived Intangible Assets [Line Items]      
Original cost 5,053   $ 5,115
Accumulated amortization (1,210)   (1,075)
Net identifiable intangible assets $ 3,843   $ 4,040
Weighted-average useful lives (years) 10 years   10 years
Developed Technology      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 8,453   $ 8,567
Accumulated amortization (3,609)   (3,261)
Net identifiable intangible assets $ 4,844   $ 5,306
Weighted-average useful lives (years) 6 years   6 years
Trademarks / Trade-Names      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 2,188   $ 2,190
Accumulated amortization (562)   (528)
Net identifiable intangible assets $ 1,626   $ 1,662
Weighted-average useful lives (years) 15 years   15 years
Covenants Not to Compete      
Finite-Lived Intangible Assets [Line Items]      
Original cost $ 36   $ 38
Accumulated amortization (19)   (14)
Net identifiable intangible assets $ 17   $ 24
Weighted-average useful lives (years) 2 years   2 years
Cost of product revenues      
Finite-Lived Intangible Assets [Line Items]      
Amortization of purchased intangibles $ 322 316  
Operating expenses      
Finite-Lived Intangible Assets [Line Items]      
Amortization of purchased intangibles $ 226 $ 199