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Summary of significant accounting policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Disaggregation of Revenue

The following table provides disaggregated revenue from contracts with customers by geographical market, as the nature, amount, timing and uncertainty of revenue and cash flows can differ between domestic and international customers.

	Three months ended June 30,								Six months ended June 30,
Net sales by geographic region:	2018				2017				2018				2017
United States	$	53,038			$	49,906			$	115,145			$	106,329
International	6,017				5,950				9,830				10,101
Total net sales	$	59,055			$	55,856			$	124,975			$	116,430

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045

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