5 - Accrued Expenses (Detail) - Schedule of accrued liabilities (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Commissions, network costs and other general accruals	$ 1,826	$ 1,374
Accrued USF and sales tax	1,073	878
Deferred payroll and other payroll related liabilities	544	554
Interest due on convertible promissory notes and other debt	1,383	1,243
Payments due to third party providers	140	512
	$ 4,966	$ 4,561