CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Data center services	$ 167,286	$ 133,453	$ 128,200
Internet protocol (IP) services	106,306	111,175	115,964
Total revenues	273,592	244,628	244,164
Direct costs of network, sales and services, exclusive of depreciation and amortization, shown below:
Data center services	90,604	78,907	82,761
IP services	40,350	41,403	44,662
Direct costs of customer support	26,664	21,278	19,861
Direct costs of amortization of acquired technologies	4,718	3,500	3,811
Sales and marketing	31,343	29,715	29,232
General and administrative	38,635	33,952	33,048
Depreciation and amortization	36,147	36,926	30,158
(Gain) loss on disposal of property and equipment, net	(55)	37	116
Exit activities, restructuring and impairments	1,422	2,833	1,411
Total operating costs and expenses	269,828	248,551	245,060
Income (loss) from operations	3,764	(3,923)	(896)
Non-operating expenses:
Interest expense	7,566	3,701	2,170
Other, net	283	165
Total non-operating expenses	7,849	3,866	2,170
Loss before income taxes and equity in (earnings) of equity-method investment	(4,085)	(7,789)	(3,066)
Provision (benefit) for income taxes	453	(5,612)	952
Equity in (earnings) of equity-method investment, net of taxes	(220)	(475)	(396)
Net loss	(4,318)	(1,702)	(3,622)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes	84	136	(5)
Comprehensive loss	$ (4,234)	$ (1,566)	$ (3,627)
Basic and diluted net loss per share (in dollars per share)	$ (0.09)	$ (0.03)	$ (0.07)
Weighted average shares outstanding used in computing basic and diluted net loss per share (in shares)	50,761	50,422	50,467