Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2016

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
	2016			2015
Horizon software	$	18,381		$	17,879
ZTEsoft Telecom software		457			469
Contractual relationships		885			885
		19,723			19,233
Less accumulated amortization		(10,555	)		(9,410	)
Intangible assets, net	$	9,168		$	9,823