Annual report pursuant to Section 13 and 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 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Concentration Risk [Line Items]                      
Revenues $ 29,118us-gaap_Revenues $ 29,393us-gaap_Revenues $ 30,393us-gaap_Revenues $ 23,633us-gaap_Revenues $ 19,762us-gaap_Revenues $ 19,777us-gaap_Revenues $ 20,157us-gaap_Revenues $ 15,747us-gaap_Revenues $ 112,537us-gaap_Revenues $ 75,443us-gaap_Revenues $ 48,576us-gaap_Revenues
U.S. revenue                      
Concentration Risk [Line Items]                      
Revenues                 88,094us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
58,677us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
35,538us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
Non-U.S. revenue                      
Concentration Risk [Line Items]                      
Revenues                 $ 24,443us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= ingn_NonUSMember
$ 16,766us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= ingn_NonUSMember
$ 13,038us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= ingn_NonUSMember