Consolidated Statements of Operations (Unaudited) (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
Sales:
Product	$ 16,862	$ 20,331	$ 55,867	$ 71,433
Service	27,388	19,885	66,290	51,907
Net sales	44,250	40,216	122,157	123,340
Costs and expenses:
Costs of product sales	10,769	11,780	34,179	39,999
Costs of service sales	14,679	11,909	37,098	33,019
Research and development	3,283	3,334	10,832	9,534
Sales, marketing and support	8,105	6,344	23,252	20,828
General and administrative	6,898	4,774	17,300	13,084
Total costs and expenses	43,734	38,141	122,661	116,464
Income (loss) from operations	516	2,075	(504)	6,876
Interest income	166	199	581	572
Interest expense	493	189	870	450
Other (expense) income, net	(156)	212	(70)	290
Income (loss) before income tax (benefit) expense	33	2,297	(863)	7,288
Income tax (benefit) expense	(118)	911	54	2,390
Net income (loss)	$ 151	$ 1,386	$ (917)	$ 4,898
Net income (loss) per common share
Basic and diluted	$ 0.01	$ 0.09	$ (0.06)	$ 0.32
Weighted average number of common shares outstanding:
Basic	15,456	15,200	15,396	15,109
Diluted	15,586	15,355	15,396	15,300