Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Revenue:
Products	$ 78,514	$ 61,999
Services	1,440	1,813
Total revenue	79,954	63,812
Cost of revenue:
Products	50,691	39,246
Services	934	424
Depreciation	587	348
Total cost of revenue	$ 52,212	$ 40,018

Depreciation of property, plant and equipment directly related to goods produced and sold and services rendered by an entity during the reporting period.

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Total costs related to goods produced and sold during the reporting period.

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Total costs related to services rendered by an entity during the reporting period.

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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