Segment and Geographical Information - Narrative (Detail) - Segment	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable segments			1
United States \| Revenue \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk (more than)	54.00%	48.00%	51.00%	46.00%
Germany \| Revenue \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk (more than)		16.00%	10.00%	15.00%
Customer A \| Revenue \| Customer Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk (more than)	10.00%
No Customer \| Revenue \| Customer Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk (more than)			10.00%
Channel Reseller A \| Revenue \| Customer Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk (more than)		10.00%		10.00%

IPASS INC 10-Q