Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Wireless Revenue, net	$ 34,351	$ 38,779
Software Revenue, net	15,768	14,351
Revenues:
Total revenues	50,119	53,130
Operating expenses:
Cost of revenue	6,805	6,667
Service, rental and maintenance	11,792	12,191
Selling and marketing	7,246	6,394
General and administrative	12,135	12,331
Severance and restructuring	20	0
Depreciation, amortization and accretion	4,029	3,807
Total operating expenses	42,027	41,390
Operating income	8,092	11,740
Interest expense, net	(67)	(64)
Other (expense) income, net	16	81
Income before income tax expense	8,041	11,757
Income tax expense	(3,151)	(4,832)
Net income	$ 4,890	$ 6,925
Basic net income per common share	$ 0.23	$ 0.32
Diluted net income per common share	$ 0.22	$ 0.32
Basic weighted average common shares outstanding	21,638,198	21,688,153
Diluted weighted average common shares outstanding	22,037,796	21,904,862
Cash dividends declared per common share	$ 0.125	$ 0.125