5. Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Intangible Assets Details
Horizon software	$ 16,575	$ 16,085
ZTE software	493	0
Contractual relationships	885	885
Intangible assets, Gross	17,953	16,970
Less accumulated amortization	(5,484)	(4,641)
Intangible assets, net	$ 12,469	$ 12,329