CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Wireless	$ 132,402	$ 149,448	$ 168,405
Software	67,871	60,304	51,291
Total revenues	200,273	209,752	219,696
Operating expenses:
Cost of revenue	32,556	27,915	26,923
Service, rental and maintenance	45,485	47,471	52,776
Selling and marketing	30,013	26,617	23,109
General and administrative	45,896	46,105	47,788
Severance and restructuring	1,495	983	1,758
Depreciation, amortization and accretion	16,677	15,167	18,232
Impairment	0	0	3,382
Total operating expenses	172,122	164,258	173,968
Operating income	28,151	45,494	45,728
Interest expense, net	(456)	(260)	(380)
Other (expense) income, net	(368)	105	715
Income before income tax expense	27,327	45,339	46,063
Income tax expense	(6,582)	(17,809)	(19,079)
Net income	$ 20,745	$ 27,530	$ 26,984
Basic net income per common share	$ 0.96	$ 1.27	$ 1.23
Diluted net income per common share	$ 0.94	$ 1.25	$ 1.20
Basic weighted average common shares outstanding	21,621,466	21,648,654	21,924,748
Diluted weighted average common shares outstanding	22,090,770	22,010,523	22,397,587
Cash distributions declared per common share	$ 0.5	$ 0.5	$ 0.75