Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Purchased intangible assets as of December 31, 2016 and 2015 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
December 31, 2016
Finite-lived intangibles:
Developed technology	$	65,527	$	56,986	$	8,541
Customer and distributor relationships	9,560		8,514		1,046
Trade names	4,361		3,675		686
Total identifiable intangible assets	$	79,448	$	69,175	$	10,273
December 31, 2015
Finite-lived intangibles:
Developed technology	$	65,527	$	55,110	$	10,417
Customer and distributor relationships	9,560		8,170		1,390
Trade names	4,361		3,575		786
Total identifiable intangible assets	$	79,448	$	66,855	$	12,593