Annual report pursuant to Section 13 and 15(d)

Nature of business - Additional Information (Details)

v2.4.1.9
Nature of business - Additional Information (Details)
12 Months Ended
Dec. 31, 2014
Minimum  
Nature Of Business [Line Items]  
Weight of oxygen portable device 4.8ingn_WeightOfPortableOxygenDevice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum  
Nature Of Business [Line Items]  
Weight of oxygen portable device 7.0ingn_WeightOfPortableOxygenDevice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Maximum | One G3  
Nature Of Business [Line Items]  
Estimated battery life of portable oxygen concentrator 4 hours 30 minutes
Maximum | One G2  
Nature Of Business [Line Items]  
Estimated battery life of portable oxygen concentrator 5 hours