Organization and Basis of Presentation (Details Textual)	6 Months Ended
	Jun. 30, 2015
Network connectivity services
Organization And Basis Of Presentation [Line Items]
Period to recognize unbilled revenue	Billing period spans more than one month, earned but unbilled revenues are recognized as revenue
PCS
Organization And Basis Of Presentation [Line Items]
Revenue recognized ratably over maintenance period	15 months