Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Breakdown of the Company Revenue (Details)

v2.4.1.9
Summary of Significant Accounting Policies - Breakdown of the Company Revenue (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Concentration Risk [Line Items]    
Revenues $ 33,752us-gaap_Revenues $ 23,633us-gaap_Revenues
U.S. revenue    
Concentration Risk [Line Items]    
Revenues 25,354us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
19,187us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
Non-U.S. revenue    
Concentration Risk [Line Items]    
Revenues $ 8,398us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= ingn_NonUSMember
$ 4,446us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= ingn_NonUSMember