Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Wireless	$ 25,860	$ 28,172
Software	15,584	17,216
Total revenue	41,444	45,388
Operating expenses:
Cost of revenue	7,036	8,017
Research and development	4,105	2,908
Service, rental and maintenance	8,066	8,305
Selling and marketing	5,922	6,529
General and administrative	11,710	10,506
Depreciation, amortization and accretion	3,223	3,323
Total operating expenses	40,062	39,588
Operating income	1,382	5,800
Interest income	122	49
Other income (expense)	(30)	254
Income before income tax expense	1,474	6,103
Income tax expense	(620)	(2,659)
Net income	$ 854	$ 3,444
Basic and diluted net income per common share (usd per share)	$ 0.04	$ 0.17
Basic weighted average common shares outstanding (shares)	20,530,739	20,706,082
Diluted weighted average common shares outstanding (shares)	20,585,542	20,706,082
Cash dividends declared per common share (usd per share)	$ 0.125	$ 0.125