v3.10.0.1

Summary of significant accounting policies - Segment and geographic information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Primary revenue source
Number of reportable segment | segment									1
Revenue	$ 67,808	$ 65,253	$ 59,601	$ 58,159	$ 57,348	$ 53,655	$ 49,033	$ 44,333	$ 250,821	$ 204,369	$ 159,344
DAS
Primary revenue source
Revenue									95,216	80,552	58,182
Military/multifamily
Primary revenue source
Revenue									77,721	55,129	39,975
Wholesale-Wi-Fi
Primary revenue source
Revenue									47,481	31,529	22,221
Retail
Primary revenue source
Revenue									17,630	24,926	26,636
Advertising and other
Primary revenue source
Revenue									$ 12,773	$ 12,233	$ 12,330

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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