Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Wireless	$ 28,172	$ 30,690
Software	17,216	17,448
Total revenue	45,388	48,138
Operating expenses:
Cost of revenue	8,017	8,813
Service, rental and maintenance	11,213	11,256
Selling and marketing	6,529	7,048
General and administrative	10,510	11,001
Severance	(4)	0
Depreciation, amortization and accretion	3,323	3,747
Total operating expenses	39,588	41,865
Operating income	5,800	6,273
Interest income (expense), net	49	(1)
Other income (expense), net	254	60
Income before income tax expense	6,103	6,332
Income tax expense	(2,659)	(2,415)
Net income	$ 3,444	$ 3,917
Basic net income per common share (usd per share)	$ 0.17	$ 0.18
Diluted net income per common share (usd per share)	$ 0.17	$ 0.18
Basic weighted average common shares outstanding (shares)	20,683,719	21,898,792
Diluted weighted average common shares outstanding (shares)	20,845,661	22,053,015
Cash dividends declared per common share (usd per share)	$ 0.125	$ 0.125