Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements include the accounts of Opower and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting and the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2015. There have been no changes to the Company’s significant accounting policies described in the Form 10-K that have had a material impact on our condensed consolidated financial statements and related notes. In the opinion of our management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement of the Company’s results of operations, financial position and cash flows have been included. The results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. The year-end condensed balance sheet data was derived from the audited financial statements, but does not include all disclosures required by GAAP. Reclassification Certain items in the prior period financial statements have been reclassified for comparative purposes to conform to the current period presentation. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. Significant items subject to such estimates include revenue recognition, the useful lives and recoverability of property and equipment, stock-based compensation and income taxes. Actual results could differ significantly from those estimates. Investments Management determines the appropriate classification of investments at the time of purchase based upon management’s intent with regard to such investments. Investments are classified as available-for-sale at the time of purchase if they are available to support either current or future operations. This classification is re-evaluated at each balance sheet date. Investments not considered cash equivalents with remaining contractual maturities of one year or less from the balance sheet date are classified as short-term investments, and those with remaining contractual maturities greater than one year from the balance sheet date are classified as long-term investments as maturities have been sequenced based upon expected cash needs to support current operations. All investments are recorded at their estimated fair value, and any unrealized gains and losses are recorded in accumulated other comprehensive income (loss). Realized gains and losses on sales and maturities of investments are recognized in the consolidated statements of operations in other income (expense). The Company performs periodic evaluations to determine whether any declines in the fair value of investments below cost are other-than-temporary. The evaluation consists of qualitative and quantitative factors regarding the severity and duration of the unrealized loss, as well as the Company’s ability and intent to hold the marketable securities until a forecasted recovery occurs. The impairments are considered to be other-than-temporary if they are related to deterioration in credit risk or if it is likely that the underlying securities will be sold prior to a full recovery of their cost basis. Other-than-temporary fair value impairments are determined based on the specific identification method and are reported in other income (expense) in the consolidated statements of operations. Fair Value Measurement The Company applies fair value accounting for all financial assets and liabilities that are reported at fair value in the financial statements on a recurring basis. Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The accounting guidance establishes a defined three-tier hierarchy to classify and disclose the fair value of assets and liabilities on both the date of their initial measurement as well as all subsequent periods. The hierarchy prioritizes the inputs used to measure fair value by the lowest level of input that is available and significant to the fair value measurement. The three levels are described as follows: • Level 1: • Level 2: • Level 3: The Company evaluates its financial assets and liabilities subject to fair value measurements on a recurring basis to determine the appropriate level of classification as of each reporting period. Concentration of Credit Risk Financial instruments that potentially subject the Company to significant concentration of credit risk consist primarily of cash, cash equivalents, investments and accounts receivable. The Company maintains the majority of its cash, cash equivalents and investments with two financial institutions, both of which management believes to be financially sound and with minimal credit risk. The Company’s deposits periodically exceed amounts guaranteed by the Federal Deposit Insurance Corporation. To manage accounts receivable risk, the Company monitors and evaluates the credit worthiness of its customers and maintains an allowance for doubtful accounts as deemed necessary. Collection efforts from long-established utilities have been historically successful, so the Company believes credit risk to be low. The following table summarizes those customers who represented at least 10% of revenue or accounts receivable for the periods presented: Revenue Accounts Receivable Three Months Ended March 31, December 31, 2016 2015 2016 2015 Customer A 17 % 19 % 23 % 17 % Customer B 13 % * 19 % 31 % * = Represented less than 10% Revenue Recognition The Company derives its revenue from contractual agreements with utilities through subscriptions and services, which include analyzing data provided by the utilities and using that data to encourage utility customers to reduce energy consumption or improve satisfaction or both. The Company generates its revenue from subscriptions to its cloud-based data analytics platform and provision of services to its clients. Subscription fees primarily pay for the ongoing integration of utility data into our software platform and the analysis and presentation of this data to energy consumers. The Company provides two main subscription service deliverables: (i) data analytics services and (ii) web platform services. Revenue for subscription fees is generally recognized ratably over the contract term beginning on the date the service is available to the client, which typically coincides with website launch or first reports delivered to households. Subscription contracts typically have a term of one to six years. Our subscription contracts generally do not provide the right to take possession of the supporting software and grant limited access to our platform. Therefore, our arrangements are accounted for as service contracts. Service fees cover specific services performed for our utility clients, which may include program enablement services, research, program customizations and training, custom development on top of the Company’s software platform, as well as services provided by third party providers for which the Company is the principal in the arrangement with the client. Program enablement services, which tend not to provide stand-alone value, are deferred and recognized ratably over the expected customer relationship period, which is generally the greater of four years or the contract period. Services revenues are generally recognized over the term of the contract, or on a completed contract basis for deliverables that are determined to be separate units of accounting. Cost of Revenue Cost of revenue for subscriptions generally consists of information services necessary to perform data analysis, the costs of data center capacity, employee-related expenses, including salaries, benefits and stock-based compensation related to operating and servicing our internal applications, channel delivery fees, including printing and mailing for delivery of reports to utility customers, and amortization of internally capitalized software that delivers our services. In addition, we allocate a portion of overhead costs, including rent, information technology and employee benefit costs, to cost of revenue. Cost of revenue for services primarily consists of personnel costs, including salaries, benefits and stock-based compensation, allocated overhead, and third-party costs. Comprehensive Loss Comprehensive loss consists of two components, net loss and other comprehensive income (loss). Other comprehensive income (loss) refers to gains and losses that are recorded as a separate element of stockholders’ equity and are excluded from net loss. The Company’s other comprehensive loss is comprised of foreign currency translation adjustments, unrealized gains or losses on available-for-sale securities and unrealized gains or losses on hedge transactions. Operating Segment Operating segments are defined as components of a business that can earn revenue and incur expenses for which discrete financial information is available that is evaluated on a regular basis by the chief operating decision maker (“CODM”) to decide how to allocate resources and assess performance. The Company’s CODM, the Chief Executive Officer, reviews consolidated results of operations to make decisions, therefore the Company views its operations and manages its business as one operating segment. Recently Issued Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers Principal versus Agent Considerations (Reporting Revenue Gross versus Net) Identifying Performance Obligations and Licensing In April 2015, the FASB issued ASU 2015-05, Intangibles—Goodwill and Other-Internal-Use Software Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs Interest—Imputation of Interest: Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes, In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In February 2016, the FASB issued ASU No. 2016-02 , Leases (Topic 842) Leases (Topic 840) In March 2016, the FASB issued ASU No. 2016-09: Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting |