Goodwill and Intangible Assets, Net - Finite-Lived Intangibles (Details) - USD ($) $ in Thousands			12 Months Ended
		Aug. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1]		$ 55,170	$ 54,607
Accumulated Amortization	[1]		(26,621)	(21,681)
Intangible assets, net	[1]		28,549	32,926
Finite-lived intangible assets, fully amortized, gross			$ 10,200	9,000
Intangible assets acquired, weighted average amortization period			4 years 9 months 18 days
Amortization expense			$ 6,274	4,842	$ 4,162
Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			1 year
Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			15 years
Cost of sales
Finite-Lived Intangible Assets, Net [Abstract]
Amortization expense			$ 76	123	153
Selling, general and administrative
Finite-Lived Intangible Assets, Net [Abstract]
Amortization expense			6,198	4,719	$ 4,009
Distribution rights
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1]		302	312
Accumulated Amortization	[1]		(119)	(96)
Intangible assets, net	[1]		$ 183	216
Intangible asset, estimated period of benefit			10 years
Patents
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1]		$ 12,038	11,425
Accumulated Amortization	[1]		(4,775)	(4,737)
Intangible assets, net	[1]		$ 7,263	6,688
Intangible asset, estimated period of benefit			10 years
Trademark and trade names
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1],[2]		$ 2,400	2,401
Accumulated Amortization	[1],[2]		(1,310)	(1,053)
Intangible assets, net	[1],[2]		$ 1,090	1,348
Intangible asset, estimated period of benefit			10 years
Developed and core technology
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1],[2]		$ 12,585	12,587
Accumulated Amortization	[1],[2]		(4,068)	(2,144)
Intangible assets, net	[1],[2]		$ 8,517	10,443
Developed and core technology | Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			5 years
Developed and core technology | Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			15 years
Developed and core technology | Ecolink Intelligent Technology, Inc.
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets acquired		$ 9,080
Intangible assets acquired, weighted average amortization period		5 years
Developed and core technology | Ecolink Intelligent Technology, Inc. | Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			4 years
Developed and core technology | Ecolink Intelligent Technology, Inc. | Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			14 years
Capitalized software development costs
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1]		$ 142	167
Accumulated Amortization	[1]		(5)	(97)
Intangible assets, net	[1]		$ 137	70
Intangible asset, estimated period of benefit			2 years
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross	[1],[2]		$ 27,703	27,715
Accumulated Amortization	[1],[2]		(16,344)	(13,554)
Intangible assets, net	[1],[2]		$ 11,359	$ 14,161
Customer relationships | Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			10 years
Customer relationships | Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit			15 years
Customer relationships | Ecolink Intelligent Technology, Inc.
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit		5 years	5 years
Intangible assets acquired		$ 1,300
Trade Names | Ecolink Intelligent Technology, Inc.
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit		7 years	7 years
Intangible assets acquired		$ 400

[1] This table excludes the gross value of fully amortized intangible assets totaling $10.2 million and $9.0 million on December 31, 2016 and 2015, respectively.

[2] During the third quarter of 2015, we purchased a trade name valued at $0.4 million, which is being amortized ratably over seven years; developed technology valued at $9.1 million, which is being amortized over a weighted average period of approximately five years; and customer relationships valued at $1.3 million, which are being amortized ratably over five years. Refer to Note 22 for further information regarding our purchase of these intangible assets.