Intangible assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The following table summarizes intangible assets as of December 31, 2017 and 2016 (in thousands):

	Weighted-Average	December 31, 2017
	Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization			Net Book Value
Trademarks	5	$	1,900	$	(1,678	)	$	222
Technology	3	1,453		(646		)	807
Customer relationships	5	1,300		(1,148		)	152
Total		$	4,653	$	(3,472	)	$	1,181

	Weighted-Average	December 31, 2016
	Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization			Net Book Value
Trademarks	5	$	1,900	$	(1,298	)	$	602
Technology	3	1,453		(161		)	1,292
Customer relationships	5	1,300		(888		)	412
Total		$	4,653	$	(2,347	)	$	2,306

Summary of the Future Amortization Expense of Purchased Intangible Assets

The estimated future amortization expense of purchased intangible assets as of December 31, 2017, is as follows (in thousands):

	Total
2018	$	858
2019	323
Thereafter	—
Total	$	1,181