Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Revenue	$ 14,286	$ 14,731
Cost of revenue and operating expenses:
Network access costs	9,559	7,442
Network operations	1,692	2,098
Research and development	1,974	2,140
Sales and marketing	2,454	2,837
General and administrative	2,772	2,990
Restructuring charges and related adjustments	0	758
Total cost of revenue and operating expenses	18,451	18,265
Operating loss	(4,165)	(3,534)
Interest income (expense), net	14	5
Foreign exchange loss, net	(49)	(110)
Loss before income taxes	(4,200)	(3,639)
Provision for income taxes	115	91
Net loss	(4,315)	(3,730)
Comprehensive loss	$ (4,315)	$ (3,730)
Net loss per share - basic and diluted
Total net income (loss) per share (USD per share)	$ (0.07)	$ (0.06)
Weighted average shares outstanding - basic and diluted	65,567,707	63,146,622