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Balance Sheet Components - Schedule of Allowances for Accounts Receivable (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Allowances - accounts receivable |  |
Doubtful accounts | $ 1,356 | $ 1,415
Rental revenue adjustments | 1,081 | 947
Sales returns | 1,485 | 904
Total allowances - accounts receivable | $ 3,922 | $ 3,266

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- Definition Allowances accounts receivable. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Allowances for sales returns. + References No definition available. + Details
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Namespace Prefix: | ingn_
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Balance Type: | credit
Period Type: | instant

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- Definition Doubtful accounts. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Rental revenue adjustments. + References No definition available. + Details
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Namespace Prefix: | ingn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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