Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of intangible assets

Intangible assets consist primarily of software development costs and customer and reseller relationships which are amortized over the estimated useful life, generally on a straight-line basis with the exception of customer relationships, which are generally amortized over the greater of straight-line or the related asset’s pattern of economic benefit.(in thousands)

	June 30			December 31
	2017			2016
Horizon software	$	18,752		$	18,634
ZTEsoft Telecom software		448			438
Contractual relationships		885			885
		20,085			19,957
Less accumulated amortization		(12,854	)		(11,550	)
Intangible assets, net	$	7,231		$	8,407