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Summary of Significant Accounting Policies (Policies) | 12 Months Ended
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Dec. 31, 2016
Summary of Significant Accounting Policies |
Basis of Presentation | Basis of Presentation The accompanying consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”).
Need to Raise Additional Capital | Need to Raise Additional Capital The Company has incurred net losses since its inception and anticipates net losses and negative operating cash flows for the near future. For the year ended December 31, 2016, the Company had a net loss of $95.8 million, and as of December 31, 2016, it had an accumulated deficit of $345.9 million. At December 31, 2016, the Company had $15.3 million in cash and cash equivalents, $130.9 million in marketable securities, and $49.6 million of outstanding debt with accrued interest. While the Company has introduced multiple products that are generating revenues, these revenues have not been sufficient to fund all operations. Accordingly, the Company has funded the portion of operating costs that exceeds revenues through a combination of equity issuances, debt issuances, and other financings. The Company expects to develop and commercialize future products and, consequently, it will need to generate additional revenues to achieve future profitability and may need to raise additional equity or debt financing. If the Company raises additional funds by issuing equity securities, its stockholders would experience dilution. Additional debt financing, if available, may involve covenants restricting its operations or its ability to incur additional debt. Any additional debt financing or additional equity that the Company raises may contain terms that are not favorable to it or its stockholders and require significant debt service payments, which diverts resources from other activities. Additional financing may not be available at all, or in amounts or on terms acceptable to the Company. If the Company is unable to obtain additional financing, it may be required to delay the development, commercialization and marking of its products and significantly scale back its business and operations. Based on our current business plan, we believe that our existing cash and marketable securities will be sufficient to meet our anticipated cash requirements for at least 12 months after March 16, 2017.
Principles of Consolidation | Principles of Consolidation The accompanying condensed consolidated financial statements include all the accounts of the Company and its subsidiary. The Company established a subsidiary that operates in the state of Texas in December 2014 to support the Company’s laboratory and operational functions, which became active in the second quarter of 2015. All intercompany balances and transactions have been eliminated.
Use of Estimates | Use of Estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions about future events that affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Significant items subject to such estimates include the allowance for doubtful accounts, accrued liability for potential refund requests, stock-based compensation, the fair value of common stock and fair value of debt accounted for under ASC 815, as well as income tax uncertainties. These estimates and assumptions are based on management's best estimates and judgment. Management regularly evaluates its estimates and assumptions using historical experience and other factors; however, actual results could differ from these estimates and could have an adverse effect on the Company's financial statements.
Fair Value | Fair Value The Company discloses the fair value of financial instruments for financial assets and liabilities for which the value is practicable to estimate. Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The Company carried senior secured term loan and warrants at fair value according to the fair value measurement guidance.
Cash and Cash Equivalents | Cash and Cash Equivalents Cash and cash equivalents consist of cash and money market deposits with financial institutions.
Restricted Cash | Restricted Cash The Company discloses both short-term and long-term restricted cash. Short-term restricted cash consists of $1.1 million, which secured a $0.8 million letter of credit for the sublease of the First Space (defined in Note 6) that expired in October 2016, however, the associated restriction has not been released as of December 31, 2016, and a $0.3 million letter of credit for the sublease of the Second Space (defined in Note 6), which expired in January 2017. Long-term restricted cash consists of $0.3 million deposit per credit card terms.
Investments | Investments Management determines the appropriate classification of securities at the time of purchase and reevaluates such determination at each balance sheet date. The Company generally classifies its entire investment portfolio as available-for-sale. The Company views its available-for-sale portfolio as available for use in current operations. Accordingly, the Company classifies all investments as short-term, even though the stated maturity may be more than one year from the current balance sheet date. Available-for-sale securities are carried at fair value, with unrealized gains and losses reported in accumulated other comprehensive loss, which is a separate component of stockholders’ equity.
Risk and Uncertainties | Risk and Uncertainties Financial instruments that potentially subject the Company to credit risk consist of cash, accounts receivable and investments. The Company limits its exposure to credit loss by placing its cash in financial institutions with high credit ratings. The Company's cash may consist of deposits held with banks that may at times exceed federally insured limits. The Company performs evaluations of the relative credit standing of these financial institutions and limits the amount of credit exposure with any one institution. The Company bills third-party payers for certain tests performed. The amount that is ultimately received from the payer for the Company’s claim and the timing of such payments are subject to the determination of the payer based on the nature of the test performed and their view of the Company’s business practices with respect to collections of plan deductibles and co-payments from patients and other activities. This determination can impact both the amount and timing of when the Company’s invoices are collected. Payers may also withhold payments and request refunds of prior payments if the Company does not perform in accordance with the policies of these payers. The Company performs evaluations of financial conditions for clinics and laboratory partners and generally does not require collateral to support credit sales. For 2016, 2015 and 2014, there were no customers exceeding 10% in total revenue. As of December 31, 2016, one customer had an outstanding balance of approximately 52% of net accounts receivable, and as of December 31, 2015, no customers had an outstanding balance greater than 10% of net accounts receivable.
Allowance for Doubtful Accounts | Allowance for Doubtful Accounts Trade accounts receivable are recorded at the amount billed to the laboratory partners and clinics. Reducing this amount is an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make the contracted payments. Management analyzes accounts receivable and historical bad debt experience, customer creditworthiness, current economic trends, and changes in customer payment history when evaluating the adequacy of the allowance for doubtful accounts. Accounts receivable are written off against the allowance when there is substantive evidence that the account will not be paid.
Revenue Recognition | Revenue Recognition The Company generally bills an insurance carrier, a clinic or a patient for the test upon delivery of the test result. The Company also bills patients directly for out-of-pocket costs not covered by their insurance carriers representing co-pays and deductibles in accordance with their insurance carrier and health plans. For tests performed, where an agreed upon reimbursement rate or fixed fee and a predictable history or likelihood of collections exists, the Company recognizes revenues upon delivery of the test report to the prescribing physician based on the established billing rate less contractual and other adjustments, such as an allowance for doubtful accounts, to arrive at the amount that the Company expects to collect. In all other situations, as the Company does not have sufficient history of collection and is not able to determine collectability, the Company recognizes revenues when cash is received. The Company may not get reimbursed for tests completed if the tests are not covered under the insurance carrier’s reimbursement policies or the Company is not a qualified provider to the insurance carrier. From time to time, the Company receives requests for refunds of payments previously made by insurance carriers. The Company has established an accrued liability for potential refund requests based on its experience, which is accounted for as reductions in revenues in the statement of operations and comprehensive loss. In cases where the Company sells its tests through its laboratory partners, the majority of the laboratory partners bill the patient, clinic, or insurance carrier for the performance of the Company's tests. For tests sold through a limited number of its laboratory partners, the Company bills directly to a patient, clinic or insurance carrier, or a combination of the insurance carrier and patient for the fees. The Company considers its services rendered when it delivers reports of its test results to the laboratory partner, clinic or patient. When the Company has contracted fixed rates for its services and collectability of its revenues is reasonably assured, it recognizes revenues upon delivery of test reports. The fixed fees identified in contracts with laboratory partners change only if a pricing amendment is agreed upon between both parties. For cases in which there is no fixed price established with a laboratory partner, the Company then recognizes revenues from partner distributed tests on a cash basis. Certain of the Company's arrangements include multiple deliverables. For revenue arrangements with multiple deliverables, the Company evaluates each deliverable to determine whether it qualifies as a separate unit of accounting. This determination is based on whether the deliverable has "stand-alone value" to the customer and whether a general right of return exists. The consideration that is fixed or determinable is then allocated to each separate unit of accounting based on the relative selling price of each deliverable. The consideration allocated to each unit of accounting is recognized as the related goods or services are delivered, limited to the consideration that is not contingent upon future deliverables. The Company uses judgment in identifying the deliverables in its arrangements, assessing whether each deliverable is a separate unit of accounting, and in determining the best estimate of selling price for certain deliverables. The Company also uses judgment in determining the period over which the deliverables are recognized in certain of its arrangements. Any amounts received that do not meet the criteria for revenue recognition are recorded as deferred revenue until such criteria are met. The Company receives royalty revenue through the licensing and the provisioning of services to support the use of the Company's proprietary technology with its customer. Royalty revenues are recognized when earned under the terms of the related agreements and are included in licensing and other revenues in the statements of operations and comprehensive loss. The Company recognizes revenue from the cloud-based distribution service offering. The Company grants its customers licenses to use the Company’s proprietary intellectual properties and the cloud-based Natera software, and provides the other services to support the use of the Company's proprietary technology with its customers. Natera’s proprietary software is used in connection with the analysis of DNA sequence data in a manner yielding a result indicating the likely presence or absence of full or partial chromosomal abnormalities. The licensees do not have the right to possess Natera software, but rather are treated as software as a service. The revenues are recognized on an accrual basis (assuming all revenue recognition criteria are met) under the terms of the related agreements and are included in licensing and other revenues in the statements of operation and comprehensive loss.
Cost of Product, Licensing and Other Revenues | Cost of Product, Licensing and Other Revenues Cost of product, licensing and other revenues includes the cost of materials, direct labor of laboratory personnel, equipment and infrastructure expenses associated with processing blood and other samples, quality control analyses, and shipping charges to transport samples and specimens from ordering physicians, clinics or individuals. Infrastructure expenses include allocated facility and related occupancy costs. Costs associated with the performance of diagnostic services are recorded as tests are processed.
Research and Development | Research and Development The Company records research and development costs in the period incurred. Research and development costs consist of personnel costs, contract services, cost of materials utilized in performing tests, costs of clinical trials and allocated facilities and related overhead expenses.
Advertising Costs | Advertising Costs The Company expenses advertising costs as incurred. The Company incurred advertising costs of $0.4 million, $1.1 million and $1.1 million for the years ended December 31, 2016, 2015 and 2014, respectively.
Product Shipment Costs | Product Shipment Costs The Company expenses product shipment costs in cost of product, licensing and other revenues in the accompanying statements of operations. Shipping and handling costs for the years ended December 31, 2016, 2015 and 2014 were $8.2 million, $7.0 million and $4.5 million, respectively.
Income Taxes | Income Taxes Income taxes are recorded in accordance with Financial Accounting Standards Board ASC Topic 740, Income Taxes ("ASC 740"), which provides for deferred taxes using an asset and liability approach. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases using enacted tax rates in effect for the year in which the differences are expected to affect taxable income. Tax benefits are recognized when it is more likely than not that a tax position will be sustained during an audit. Deferred tax assets are reduced by a valuation allowance if current evidence indicates that it is considered more likely than not that these benefits will not be realized.
Stock-Based Compensation | Stock‑Based Compensation Stock‑based compensation related to stock options and restricted stock units (“RSUs”) granted to the Company’s employees is measured at the grant date based on the fair value of the award. The fair value is recognized as expense over the requisite service period, which is generally the vesting period of the respective awards. No compensation cost is recognized on stock options for employees who do not render the requisite service and therefore forfeit their rights to the stock options. The Company uses the Black‑Scholes option‑pricing model to estimate the fair value of its stock options. The Company accounts for stock options issued to non-employees based on the estimated fair value of the awards using the Black-Scholes option-pricing model. The measurement of stock-based compensation is subject to periodic adjustments as the underlying equity instruments vest, and the resulting change in value, if any, is recognized in the Company's statements of operations and comprehensive loss during the period that the related services are rendered. The Black-Scholes option-pricing model requires the input of the Company's expected stock price volatility, the expected term of the awards, a risk-free interest rate, and expected dividends. Determining these assumptions requires significant judgment. The expected term was based on the simplified method and where the Company did not qualify to use the simplified method, the Company used the lattice model, and the volatility rate was based on that of publicly traded companies in the DNA sequencing, diagnostics, or personalized medicine industries. When selecting the public companies in these industries to be used in the volatility calculation, companies were selected with comparable characteristics to the Company, including enterprise value and financial leverage. Companies were also selected with historical share price volatility sufficient to meet the expected term of the Company's stock options. The historical volatility data was computed using the daily closing prices for the selected companies' shares during the equivalent period of the calculated expected term of the Company's stock options. The expected term of the non-employee option grants was based on their remaining contractual life at the measurement date. The risk-free interest rate assumption was based on U.S. Treasury instruments with maturities that were consistent with the option's expected term. The expected dividend assumption was based on the Company's history and expectation of dividend payouts. Starting January 1, 2016, the Company uses a different approach to estimate the expected term of its stock option awards, which involves calculating the average of—(1) its employees’ historical stock option exercise behavior, and (2) the weighted-average of the time-to-vesting and the total contractual life of the options. The Company applied this change in methodology prospectively and accounted for it as a change in accounting estimate.
Warrants | Warrants The Company accounts for warrants to purchase shares of its common stock as a liability at fair value on the balance sheet date because the Company may be obligated to redeem these warrants at some point in the future. The warrants are subject to remeasurement at each balance sheet date, with changes in fair value recognized as a gain or loss from the changes in fair value of the warrants in the statements of operations. The Company will continue to adjust the liability for changes in fair value until such time that the warrants are converted or expire.
Capitalized Software Held for Internal Use | Capitalized Software Held for Internal Use The Company capitalizes costs of software held for internal use during the application development stage of a project and amortize those costs over their estimated useful lives of three years. The net book value of capitalized software held for internal use was $1.3 million and $0.8 million as of December 31, 2016 and 2015, respectively. Amortized expense for amounts previously capitalized for the years ended December 31, 2016 and 2015 was $0.6 million and $0.2 million, respectively. There was no amortization of such capitalized costs for the year ended December 31, 2014.
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Comprehensive loss and its components encompass all changes in equity other than those with stockholders, and include net loss, unrealized gains and losses on available-for-sale marketable securities. As of December 31, 2016, and 2015, accumulated other comprehensive loss consisted of $0.7 million and $1.4 million of unrealized losses on available-for-sale marketable securities. There was $0.2 million reclassified out of accumulated other comprehensive loss during the year ended December 31, 2016, and no reclassifications were made in the years ended December 31, 2015 and 2014.
Property and Equipment | Property and Equipment Property and equipment, including purchased and internally developed software, are stated at cost. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets, which are generally three years. Leasehold improvements are amortized using the straight-line method over the estimated useful lives of the assets or the remaining term of the lease, whichever is shorter. The Company periodically reviews the depreciable lives assigned to property and equipment placed in service and change the estimates of useful lives to reflect the results of such reviews. During the third and fourth quarters of 2016, the Company performed an assessment on its estimated use of certain sequencing and automation equipment. As a result of the assessment, it was determined that the service lives of several of such equipment over which the remaining economic benefit was to be received from were significantly shorter than initially expected by the Company. Additionally, the Company wrote off the remaining maintenance service contract associated with the equipment described above. The Company accounted for the revision of its depreciation estimates on the sequencing and automation equipment and the write off of the unamortized prepaid maintenance as a change in accounting estimate, which increased its loss from operations and net loss by $1.7 million, and increased its basic and diluted net loss per share by $0.04 for the year ended December 31, 2016. During the second quarter of 2015, the Company increased the depreciable lives of certain sequencing and automation equipment from three years to five years. The effect of this change in estimate for the year ended December 31, 2015 was a decrease in loss from operations and net loss of $1.7 million, and a decrease in basic and diluted net loss per share of $0.07.
Impairment of Long-lived Assets | Impairment of Long-lived Assets The Company evaluates its long-lived assets for indicators of possible impairment when events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. The Company then compares the carrying amounts of the assets with the future net undiscounted cash flows expected to be generated by such asset. Should an impairment exist, the impairment loss would be measured based on the excess carrying value of the asset over the asset’s fair value determined using discounted estimates of future cash flows. For the years ended December 31, 2016 and 2015, we recorded asset impairment losses of $2.1 million and $1.6 million, respectively. See Note 5 for more detail about the asset impairment.
Inventory | Inventory Inventory is valued at the lower of the standard cost, which approximates actual cost, or market. Cost is determined using the first-in, first-out ("FIFO") method. Inventory consists entirely of supplies, which are consumed when providing its test reports, and therefore does not maintain any finished goods inventory. The Company enters into inventory purchases and commitments so that it can meet future delivery schedules based on forecasted demand for its tests. In December 2016, the Company determined $2.1 million of inventory as obsolete in connection with its impairment analysis of the associated automation and sequencing equipment described above, and recorded an associated charge for these materials.
Recent Accounting Pronouncements | Recent Accounting Pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board or FASB or other standard setting bodies and adopted by the Company as of the specified effective date. Unless otherwise discussed below, the Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption. In August 2014, FASB issued Accounting Standards Update No. 2014‑15 (“ASU 2014-15”), Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. ASU 2014‑15 requires management to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014‑15 is effective for the Company in the first quarter of 2017 with early adoption permitted. The Company has elected to early adopt this guidance for its annual reporting period ending December 31, 2016, and this ASU applies to all future annual and interim reporting periods. Upon adoption, the Company is required to perform assessment using detailed prospective financial information during each interim period and annually to determine whether substantial doubt exists about its ability to continue as a going concern for at least 12 months from the issuance date of the financial statements, and to provide the related disclosures. As a result of the analysis, the adoption of ASU 2014‑15 did not have a material impact on the Company’s financial statements and related disclosures, although the related disclosures could be impacted in future periods. In May 2014, FASB issued Accounting Standards Update No. 2014-09 (“ASU 2014-09”), Revenue from Contracts with Customers to provide guidance on revenue recognition. To date, the Company’s revenues have been derived primarily from contracts with insurance carriers, patients, clinics and licensing arrangements. Approximately 82% of the Company’s revenues are recognized on the cash basis, and based on the Company’s preliminary assessment, this portion of revenues may be recognized at an earlier date than in the period of actual cash receipt. Consideration is received from either patients, clinics, or insurance carriers and/or any combination of the three, and licensees. Each one of these arrangements, whether sell-in or sell-through, is considered unique and being evaluated individually under the five-step process prescribed by the new revenue standard. Currently, the Company continues to assess its contracts with insurance carriers. The Company has not completed its analysis, and it is evaluating whether the impact of adopting ASU 2014-09 will be material to its financial statements. ASU 2014-09 will be effective for the Company in the first quarter of 2018, with early adoption permitted starting the first quarter of 2017. Upon adoption, ASU 2014-09 can be applied retrospectively to all periods presented or using the modified retrospective approach, which requires the cumulative effect of changes reflected in the opening balance of retained earnings only in the most current period presented. The Company has not yet determined which method will be used upon adoption, and will plan on adopting the new guidance in the first quarter of 2018. In July 2015, FASB issued Accounting Standards Update No. 2015-11 (“ASU 2015-11”), Inventory (Topic 330): Simplifying the Measurement of Inventory (ASU 2015-11). ASU 2015-11 simplifies the subsequent measurement of inventory by replacing today’s lower of cost or market test with a lower of cost and net realizable value test. ASU 2015-11 is effective for the Company in the fiscal year beginning after December 15, 2016, and interim periods within those fiscal years. The Company does not expect the adoption of ASU 2015‑11 will have a material impact on its financial statements. In November 2015, FASB issued Accounting Standards Update No. 2015-17 (“ASU 2015-17”), Balance Sheet Classification of Deferred Taxes, which simplifies the presentation of deferred taxes by requiring that deferred tax assets and liabilities be presented as noncurrent on the balance sheet. ASU 2015-17 is effective for the Company in the fiscal year beginning after December 15, 2016, and interim periods within those fiscal years. The Company currently does not have any deferred tax assets or liabilities on its balance sheet as a full valuation allowance has been reserved against them, and it does not expect the adoption of ASU 2015-17 will have a material impact on its financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (“ASU No. 2016-02”), Leases. ASU 2016-02 is aimed at making leasing activities more transparent and comparable, and requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leases currently accounted for as operating leases. ASU 2016-02 is effective for the Company in the fiscal year beginning after December 15, 2018, and interim periods within those fiscal years with early adoption permitted. The Company plans to adopt this new guidance prospectively in the first quarter of 2019. The Company is evaluating the impact of the adoption of this guidance on its financial statements, and expects that it will increase our lease assets and correspondingly increase our lease liabilities. In March 2016, the FASB issued Accounting Standards Update No. 2016-09 (“ASU 2016-09”), Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. ASU 2016-09 includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. The new guidance requires any excess tax benefits (“windfalls”) and tax deficiencies (“shortfalls”) associated with vested or settled share-based awards to be recognized in the income statement rather than additional paid-in capital, which is to be applied prospectively. Further, windfalls will be required to be presented as an operating activity rather than as an outflow from operating activity and an inflow to financing activity, as required by the existing guidance. This new presentation guidance can be applied retrospectively or prospectively. The new guidance also eliminates the requirement to delay the recognition of windfalls until it begins to reduce current income taxes payable, and this is to be applied using the modified retrospective approach, with a cumulative effect adjustment to opening retained earnings. In addition, ASU 2016-09 allows entities to withhold an amount up to the employees’ maximum individual tax rate in the relevant jurisdiction without having to account for the award as a liability-based award, and this guidance is to be applied using the modified retrospective approach, with a cumulative effect adjustment to opening retained earnings. ASU 2016-09 also permits forfeitures to be either estimated, as required by the existing guidance, or recognized when they occur. The change in the accounting for forfeitures is required to be applied using a modified retrospective approach, with a cumulative effect adjustment to opening retained earnings. The new guidance will be effective for public entities in fiscal years beginning after December 15, 2016. The Company plans to adopt this new guidance in the first quarter of 2017 and does not expect a material impact on its financial statements given the full valuation allowance position on its deferred tax assets. In August 2016, the FASB issued Accounting Standards Update No. 2016-15 (“ASU 2016-15”), Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (A Consensus of the Emerging Issues Task Force). The purpose of ASU 2016-15 is to limit diversity in the classification of certain transactions in the statement of cash flows. Such transactions include (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon bonds, (3) contingent consideration payments made after a business combination, (4) proceeds from insurance claims settlement, (5) proceeds from settlement of life insurance policies, and (6) distributions of equity method investments. ASU 2016-15 will be effective for the Company in the fiscal year beginning after December 15, 2017, and interim periods within that fiscal year. The Company is currently evaluating the impact of adopting ASU 2016-15 on its financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18 (“ASU 2016-18”), Statement of Cash Flows (Topic 230): Restricted Cash. The purpose of ASU 2016-18 is to eliminate the diversity in classifying and presenting changes in restricted cash in the statements of cash flows. The new guidance requires restricted cash to be combined with cash and cash equivalents when reconciling the beginning and ending balances of cash on the statement of cash flows, thereby no longer requiring transactions such as transfers between restricted and unrestricted cash to be treated as a cash flow activity. Further, the new guidance requires the nature of the restrictions to be disclosed, as well as a reconciliation between the balance sheet and the statement of cash flows on how restricted and unrestricted cash are segregated. The new guidance will be effective for the Company in the fiscal year beginning after December 15, 2017, and interim periods within that fiscal year, with early adoption permitted. The Company is currently evaluating the effect the new guidance is expected to have on its financial statements.

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- Definition Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68058157&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -SubTopic 10 -Section 05 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6375392&loc=d3e26790-107797 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4273-108586 + Details
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