Statements of Income and Comprehensive (Loss) Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Revenues	$ 25,137	$ 26,104	$ 77,317	$ 82,922
Cost of product revenues	13,833	14,110	41,652	43,913
Gross profit	11,304	11,994	35,665	39,009
Sales and marketing expenses	4,414	4,670	13,790	14,182
General and administrative expenses	5,314	4,832	15,996	14,593
Research and development expenses	1,934	1,861	5,856	5,549
Restructuring charges	96	29	51	166
Amortization of intangible assets	600	681	1,955	2,071
Total operating expenses	12,358	12,073	37,648	36,561
Operating (loss) income	(1,054)	(79)	(1,983)	2,448
Other (expense) income:
Foreign exchange	(84)	(29)	(74)	(86)
Interest expense	(276)	(147)	(650)	(447)
Interest income	10	11	28	37
Other expense, net	(7)	(13)	(87)	(294)
Other (expense) income, net	(357)	(178)	(783)	(790)
(Loss) income before income taxes	(1,411)	(257)	(2,766)	1,658
Income tax (benefit) expense	(433)	(124)	(1,410)	490
Income from continuing operations	(978)	(133)	(1,356)	1,168
Discontinued Operations [Abstract]
Income from discontinued operations, net of tax	(5)	0	282	0
Income from discontinued operations, net of tax	(5)	0	282	0
Net (loss) income	(983)	(133)	(1,074)	1,168
Income (loss) per share:
Basic earnings per common share from continuing operations	$ (0.03)	$ 0.00	$ (0.04)	$ 0.04
Discontinued operations	$ 0.00	$ 0	$ 0.01	$ 0
Basic earnings per common share	$ (0.03)	$ 0.00	$ (0.04)	$ 0.04
Diluted earnings per common share from continuing operations	$ (0.03)	$ 0.00	$ (0.04)	$ 0.04
Discontinued operations	$ 0.00	$ 0	$ 0.01	$ 0
Diluted earnings per common share	$ (0.03)	$ 0.00	$ (0.04)	$ 0.04
Weighted average common shares:
Basic	30,574,815	28,797,887	30,154,788	28,758,621
Diluted	30,574,815	28,797,887	30,154,788	29,353,263
Comprehensive income (loss)
Net (loss) income	(983)	(133)	(1,074)	1,168
Foreign currency translation adjustments	2,387	1,444	497	988
Total comprehensive income (loss)	$ 1,404	$ 1,311	$ (577)	$ 2,156