Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Wireless Revenue, net	$ 32,855	$ 37,067	$ 100,724	$ 113,617
Software Revenue, net	16,936	12,602	48,280	41,450
Revenues:
Total revenues	49,791	49,669	149,004	155,067
Operating expenses:
Cost of revenue	8,000	6,787	21,985	20,415
Service, rental and maintenance	10,988	11,820	34,200	36,029
Selling and marketing	7,072	6,388	22,098	19,320
General and administrative	10,866	11,282	33,991	34,635
Severance and restructuring	545	0	569	2
Depreciation, amortization and accretion	4,247	3,858	12,628	11,487
Total operating expenses	41,718	40,135	125,471	121,888
Operating income	8,073	9,534	23,533	33,179
Interest expense, net	(63)	(68)	(194)	(196)
Other (expense) income, net	(2)	84	(180)	90
Income before income tax expense	8,008	9,550	23,159	33,073
Income tax expense	(3,356)	(3,788)	(9,326)	(13,558)
Net income	$ 4,652	$ 5,762	$ 13,833	$ 19,515
Basic net income per common share	$ 0.21	$ 0.27	$ 0.64	$ 0.90
Diluted net income per common share	$ 0.21	$ 0.26	$ 0.63	$ 0.89
Basic weighted average common shares outstanding	21,651,347	21,629,289	21,643,951	21,653,692
Diluted weighted average common shares outstanding	22,135,554	21,919,238	22,089,892	21,916,063
Cash dividends declared per common share	$ 0.125	$ 0.125	$ 0.375	$ 0.375