1. General

The unaudited condensed financial statements have been prepared on the same basis as the annual audited financial statements and, in the opinion of management, reflect all adjustments necessary for a fair presentation for each of the periods presented. The results of operations for interim periods are not necessarily indicative of results to be achieved for full fiscal years or other interim periods.

Inogen, Inc. (Company or Inogen) was incorporated in Delaware on November 27, 2001. The Company is a medical technology company that develops, manufactures and markets innovative oxygen concentrators used for supplemental long-term oxygen therapy by patients with chronic obstructive pulmonary disease, or COPD, and other chronic respiratory conditions. The Company’s proprietary Inogen One systems are designed to address the quality-of-life and other shortcomings of the traditional oxygen therapy model, which Inogen calls the delivery model. Traditionally, oxygen therapy patients have relied upon stationary oxygen concentrator systems in the home in conjunction with regular deliveries of oxygen tanks or cylinders for ambulatory, or mobile, use, limiting their mobility and requiring them to plan activities outside of their homes around delivery schedules and a finite oxygen supply.  The Company’s Inogen One systems concentrate the air around them to offer a single source of supplemental oxygen anytime, anywhere from devices weighing approximately five to seven pounds. Inogen’s products eliminate the need for oxygen deliveries, as well as regular use of a stationary concentrator, thereby improving patient quality-of-life and fostering patient mobility.

As contemplated by the Securities and Exchange Commission (SEC) under Rule 10-01 of Regulation S-X, the accompanying financial statements and related footnotes have been condensed and do not contain certain information that will be included in the Company’s annual financial statements and footnotes thereto. For further information refer to the financial statements and related footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 filed with the SEC on April 1, 2014 (Annual Report).

The preparation of the Company’s condensed financial statements in accordance with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in these condensed financial statements and accompanying notes. Management bases these estimates and assumptions upon historical experience, existing and known circumstances, authoritative accounting pronouncements and other factors that management believes to be reasonable. Significant areas requiring the use of management estimates relate to inventory and rental asset valuations and write-downs, accounts receivable reserves and allowance for bad debts, returns and adjustments, stock compensation expense, impairment assessments, depreciation and amortization, income tax provision and uncertain tax positions, fair value of financial instruments, and fair values of acquired intangibles.  Actual results could differ materially from these estimates.

Certain reclassifications have been made to prior years financial statements to conform to current period financial statement presentation with no effect on previously reported financial position, results of operations or cash flows.

The Company completed an initial public offering on February 20, 2014, and sold 3,529,411 shares to the public for $16.00 per share.  In addition, the selling shareholders sold 981,902 shares for a combined total of 4,511,313 shares sold in the offering.  The Company netted approximately $49,668 after the underwriters discount and other associated expenses.  In connection with the completion of our IPO, the Company’s outstanding redeemable convertible preferred stock and non-redeemable preferred stock were all converted to common stock.  As of September 30, 2014, the Company had 18,436,802 shares of common stock outstanding.

In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP.

The standard is effective for annual periods beginning after December 15, 2016, and interim periods therein, using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). The Company is currently evaluating the impact of the Company’s pending adoption of ASU 2014-09 on the Company’s consolidated financial statements and has not yet determined the method by which the Company will adopt the standard in 2017.