Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Sales:
Product	$ 20,062	$ 17,946	$ 35,444	$ 33,332
Service	25,904	26,909	50,902	52,828
Net sales	45,966	44,855	86,346	86,160
Costs and expenses:
Costs of product sales	12,989	12,017	23,659	22,502
Costs of service sales	13,259	13,693	26,250	26,953
Research and development	4,037	3,482	7,820	7,232
Sales, marketing and support	9,234	8,282	17,892	16,362
General and administrative	7,140	7,639	14,792	15,277
Total costs and expenses	46,659	45,113	90,413	88,326
Loss from operations	(693)	(258)	(4,067)	(2,166)
Interest income	118	144	223	292
Interest expense	353	366	728	734
Other income, net	144	623	67	1,036
(Loss) income before income tax expense (benefit)	(784)	143	(4,505)	(1,572)
Income tax expense (benefit)	22	106	(908)	(187)
Net income (loss)	$ (806)	$ 37	$ (3,597)	$ (1,385)
Net (loss) income per common share
Earnings Per Share, Basic and Diluted	$ (0.05)	$ 0.00	$ (0.23)	$ (0.09)
Earnings Per Share, Diluted	$ (0.05)	$ 0.00	$ (0.23)	$ (0.09)
Weighted average number of common shares outstanding:
Weighted Average Number of Shares Outstanding, Basic	15,825	15,629	15,774	15,584
Weighted Average Number of Shares Outstanding, Basic and Diluted		15,629		15,584
Diluted	15,825	15,780	15,774	15,584