Document and Entity Information
Document and Entity Information - shares | 6 Months Ended | |
Jun. 30, 2018 | Aug. 03, 2018 | |
Document And Entity Information [Abstract] | ||
Document Type | 10-Q | |
Amendment Flag | false | |
Document Period End Date | Jun. 30, 2018 | |
Document Fiscal Year Focus | 2,018 | |
Document Fiscal Period Focus | Q2 | |
Trading Symbol | AGLE | |
Entity Registrant Name | Aeglea BioTherapeutics, Inc. | |
Entity Central Index Key | 1,636,282 | |
Current Fiscal Year End Date | --12-31 | |
Entity Filer Category | Non-accelerated Filer | |
Entity Common Stock, Shares Outstanding | 21,995,032 |
Condensed Consolidated Balance
Condensed Consolidated Balance Sheets (unaudited) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017 |
CURRENT ASSETS | ||
Cash and cash equivalents | $ 20,579,000 | $ 12,817,000 |
Marketable securities | 51,614,000 | 37,482,000 |
Accounts receivable - grant | 4,281,000 | 3,078,000 |
Prepaid expenses and other current assets | 2,414,000 | 1,614,000 |
Total current assets | 78,888,000 | 54,991,000 |
Property and equipment, net | 776,000 | 854,000 |
Other non-current assets | 49,000 | 232,000 |
TOTAL ASSETS | 79,713,000 | 56,077,000 |
CURRENT LIABILITIES | ||
Accounts payable | 952,000 | 389,000 |
Deferred revenue | 0 | 20,000 |
Accrued and other current liabilities | 5,223,000 | 5,220,000 |
Total current liabilities | 6,175,000 | 5,629,000 |
Other non-current liabilities | 91,000 | 111,000 |
TOTAL LIABILITIES | 6,266,000 | 5,740,000 |
Commitments and Contingencies (Note 9) | ||
STOCKHOLDERS’ EQUITY | ||
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of June 30, 2018 and December 31, 2017; no shares issued and outstanding as of June 30, 2018 and December 31, 2017 | ||
Common stock, $0.0001 par value; 500,000,000 shares authorized as of June 30, 2018 and December 31, 2017; 21,908,192 shares and 16,670,188 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively | 2,000 | 2,000 |
Additional paid-in capital | 163,547,000 | 122,950,000 |
Accumulated other comprehensive loss | (56,000) | (102,000) |
Accumulated deficit | (90,046,000) | (72,513,000) |
TOTAL STOCKHOLDERS’ EQUITY | 73,447,000 | 50,337,000 |
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY | $ 79,713,000 | $ 56,077,000 |
Condensed Consolidated Balance3
Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares | Jun. 30, 2018 | Dec. 31, 2017 |
Statement Of Financial Position [Abstract] | ||
Preferred stock, par value | $ 0.0001 | $ 0.0001 |
Preferred stock, shares authorized | 10,000,000 | 10,000,000 |
Preferred stock, shares issued | 0 | 0 |
Preferred stock, shares outstanding | 0 | 0 |
Common stock, par value | $ 0.0001 | $ 0.0001 |
Common stock, shares authorized | 500,000,000 | 500,000,000 |
Common stock, shares issued | 21,908,192 | 16,670,188 |
Common stock, shares outstanding | 21,908,192 | 16,670,188 |
Condensed Consolidated Statemen
Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Revenues: | ||||
Grant | $ 2,378 | $ 1,479 | $ 3,888 | $ 2,462 |
Type of revenue [extensible list] | us-gaap:GrantMember | us-gaap:GrantMember | us-gaap:GrantMember | us-gaap:GrantMember |
Operating expenses: | ||||
Research and development | $ 9,122 | $ 5,835 | $ 15,992 | $ 10,784 |
General and administrative | 2,926 | 2,364 | 5,811 | 4,729 |
Total operating expenses | 12,048 | 8,199 | 21,803 | 15,513 |
Loss from operations | (9,670) | (6,720) | (17,915) | (13,051) |
Other income (expense): | ||||
Interest income | 263 | 100 | 406 | 195 |
Other expense, net | (7) | (12) | (24) | (23) |
Total other income | 256 | 88 | 382 | 172 |
Net loss | $ (9,414) | $ (6,632) | $ (17,533) | $ (12,879) |
Net loss per share, basic and diluted | $ (0.46) | $ (0.47) | $ (0.94) | $ (0.94) |
Weighted-average common shares outstanding, basic and diluted | 20,598,711 | 14,114,101 | 18,646,265 | 13,742,029 |
Condensed Consolidated Stateme5
Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Statement Of Income And Comprehensive Income [Abstract] | ||||
Net loss | $ (9,414) | $ (6,632) | $ (17,533) | $ (12,879) |
Other comprehensive income (loss): | ||||
Unrealized gain (loss) on marketable securities | 42 | 8 | 46 | (25) |
Total comprehensive loss | $ (9,372) | $ (6,624) | $ (17,487) | $ (12,904) |
Condensed Consolidated Stateme6
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended | |
Jun. 30, 2018 | Jun. 30, 2017 | |
CASH FLOWS FROM OPERATING ACTIVITIES | ||
Net loss | $ (17,533) | $ (12,879) |
Adjustments to reconcile net loss to net cash used in operating activities: | ||
Depreciation and amortization | 145 | 114 |
Purchase net discount (premium) on marketable securities | 401 | (40) |
Net (accretion of discount) amortization of premium on marketable securities | (107) | 80 |
Stock-based compensation | 1,831 | 1,066 |
Research and development services settled with stock | 41 | |
Other, net | (20) | (13) |
Changes in operating assets and liabilities: | ||
Accounts receivable-grant | (1,203) | 2 |
Prepaid expenses and other assets | (573) | 29 |
Accounts payable | 579 | 340 |
Deferred revenue | (20) | |
Accrued and other liabilities | (32) | (73) |
Net cash used in operating activities | (16,491) | (11,374) |
CASH FLOWS FROM INVESTING ACTIVITIES | ||
Purchases of property and equipment | (118) | (317) |
Purchases of marketable securities | (26,250) | (37,780) |
Proceeds from maturities of marketable securities | 11,870 | 17,010 |
Net cash used in investing activities | (14,498) | (21,087) |
CASH FLOWS FROM FINANCING ACTIVITIES | ||
Proceeds from issuance of common stock in public offering, net of offering costs | 37,690 | 11,551 |
Proceeds from employee stock plan purchases and stock option exercises | 1,061 | 96 |
Net cash provided by financing activities | 38,751 | 11,647 |
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 7,762 | (20,814) |
CASH AND CASH EQUIVALENTS | ||
Beginning of period | 12,817 | 47,748 |
End of period | $ 20,579 | $ 26,934 |
The Company and Basis of Presen
The Company and Basis of Presentation | 6 Months Ended |
Jun. 30, 2018 | |
Organization Consolidation And Presentation Of Financial Statements [Abstract] | |
The Company and Basis of Presentation | 1. The Company and Basis of Presentation Aeglea BioTherapeutics, Inc. (“Aeglea” or the “Company”) is a clinical-stage biotechnology company that designs and develops innovative human enzyme therapeutics for patients with rare genetic diseases and cancer. The Company was formed as a Limited Liability Company (LLC) in Delaware on December 16, 2013 under the name Aeglea BioTherapeutics Holdings, LLC and was converted from a Delaware LLC to a Delaware corporation (the “LLC Conversion”) on March 10, 2015. The Company operates in one segment and has its principal offices in Austin, Texas. Stock Offering In April 2018, the Company issued and sold 5,046,510 shares of common stock in an underwritten public offering (“2018 Stock Offering”) pursuant to a shelf registration statement on Form S-3 at a public offering price of $8.00 per share, including 546,510 shares of common stock issued upon the partial exercise by the underwriters of their option to purchase additional shares. The net proceeds to the Company from this public offering were $37.7 million, after deducting underwriting discounts and commissions of $2.4 million and offering costs of $300,000. As of June 30, 2018, the Company had $36,000 in offering costs recorded as an outstanding liability on the balance sheet. Liquidity As of June 30, 2018, the Company had working capital of $72.7 million, an accumulated deficit of $90.0 million, and cash, cash equivalents, and marketable securities of $72.2 million. The Company has not generated any product revenues and has not achieved profitable operations. There is no assurance that profitable operations will ever be achieved, and, if achieved, could be sustained on a continuing basis. In addition, development activities, clinical and nonclinical testing, and commercialization of the Company’s products will require significant additional financing. The Company is subject to a number of risks similar to other life science companies, including, but not limited to, risks related to the successful discovery and development of product candidates, raising additional capital, development of competing drugs and therapies, protection of proprietary technology and market acceptance of the Company’s products. As a result of these and other factors and the related uncertainties, there can be no assurance of the Company’s future success. Based upon the Company’s current operating plans, the Company believes that it has sufficient resources to fund operations to the middle of 2020 with its existing cash, cash equivalents, and marketable securities. The Company will need to secure additional funding in the future, in order to carry out all of its planned research and development activities. If the Company is unable to obtain additional financing or generate license or product revenue, the lack of liquidity could have a material adverse effect on the Company’s future prospects. Unaudited Interim Financial Information The interim condensed consolidated financial statements included in this document are unaudited. The unaudited interim financial statements have been prepared on the same basis as the annual financial statements and reflect, in the opinion of management, all adjustments of a normal and recurring nature that are necessary for a fair statement of the Company’s financial position as of June 30, 2018, and its results of operations for the three and six months ended June 30, 2018 and 2017, and cash flows for the six months ended June 30, 2018 and 2017. The results of operations for the six months ended June 30, 2018 are not necessarily indicative of the results to be expected for the year ending December 31, 2018 or for any other future annual or interim period. The December 31, 2017 balance sheet was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States (“U.S. GAAP”). These financial statements should be read in conjunction with the audited financial statements included in the Company’s Form 10-K for the year ended December 31, 2017 as filed with the SEC. |
Summary of Significant Accounti
Summary of Significant Accounting Policies | 6 Months Ended |
Jun. 30, 2018 | |
Accounting Policies [Abstract] | |
Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such management estimates include those related to accruals of research and development related costs, stock-based compensation, and certain company income tax related items. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions that management believes to be reasonable under the circumstances. Actual results could differ significantly from those estimates. Cash and Cash Equivalents The Company considers all highly liquid investments with original maturities of three months or less from the date of purchase to be cash equivalents. Cash equivalents consist of money market funds and debt securities and are stated at fair value. Marketable Securities All investments have been classified as available-for-sale and are carried at estimated fair value as determined based upon quoted market prices or pricing models for similar securities. Management determines the appropriate classification of its investments in debt securities at the time of purchase. The Company may or may not hold securities with stated maturities greater than one year until maturity. All available-for-sale securities are considered available to support current operations and are classified as current assets. Unrealized gains and losses are excluded from earnings and are reported as a component of accumulated comprehensive loss. Realized gains and losses and declines in fair value judged to be other than temporary, if any, on available-for-sale securities are included in other income (expense). The cost of securities sold is based on the specific-identification method. There were no realized gains or losses on marketable securities for the six months ended June 30, 2018 and 2017 . Interest on marketable securities is included in interest Concentration of Credit Risk Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, and marketable securities. The Company’s investment policy limits investments to high credit quality securities issued by the U.S. government, U.S. government-sponsored agencies and highly rated banks, subject to certain concentration limits and restrictions on maturities. The Company’s cash, cash equivalents, and marketable securities are held by financial institutions in the United States that management believes are of high credit quality. Amounts on deposit may at times exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents and its accounts are monitored by management to mitigate risk. The Company is exposed to credit risk in the event of default by the financial institutions holding its cash and cash equivalents and bond issuers. Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. Repairs and maintenance that do not extend the life or improve an asset are expensed as incurred. Upon retirement or sale, the cost of disposed assets and their related accumulated depreciation and amortization are removed from the balance sheet. Any gain or loss is credited or charged to operations. The useful lives of the property and equipment are as follows: Laboratory equipment 5 years Furniture and office equipment 5 years Computer equipment 3 years Software 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life Impairment of Long-Lived Assets Long-lived assets are reviewed for indications of possible impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is measured by comparison of the carrying amounts to the future undiscounted cash flows attributable to these assets. An impairment loss is recognized to the extent an asset group is not recoverable, and the carrying amount exceeds the projected discounted future cash flows arising from these assets. There were no impairments of long-lived assets for the six months ended June 30, 2018 and 2017. Accrued Research and Development Costs The Company records the costs associated with research nonclinical studies, clinical trials, and manufacturing development as incurred. These costs are a significant component of the Company’s research and development expenses, with a substantial portion of the Company’s on-going research and development activities conducted by third-party service providers, including contract research and manufacturing organizations. The Company accrues for expenses resulting from obligations under agreements with contract research organizations (“CROs”), contract manufacturing organizations (“CMOs”), and other outside service providers for which payment flows do not match the periods over which materials or services are provided to the Company. Accruals are recorded based on estimates of services received and efforts expended pursuant to agreements established with CROs, CMOs, and other outside service providers. These estimates are typically based on contracted amounts applied to the proportion of work performed and determined through analysis with internal personnel and external service providers as to the progress or stage of completion of the services. The Company makes significant judgments and estimates in determining the accrual balance in each reporting period. In the event advance payments are made to a CRO, CMO, or outside service provider, the payments will be recorded as a prepaid asset which will be amortized as the contracted services are performed. As actual costs become known, the Company adjusts its accruals. Inputs, such as the services performed, the number of patients enrolled, or the study duration, may vary from the Company’s estimates, resulting in adjustments to research and development expense in future periods. Changes in these estimates that result in material changes to the Company’s accruals could materially affect the Company’s results of operations. The Company has not experienced any material deviations between accrued and actual research and development expenses. Leases The Company entered into lease agreements for its office and laboratory facilities. The leases are classified as operating leases. The Company records rent expense on a straight-line basis over the term of the leases and, accordingly records the difference between cash rent payments and the recognition of rent expense as a deferred rent liability. Incentives granted under the Company’s facilities leases, including allowances to fund leasehold improvements, are deferred and are recognized as adjustments to rental expense on a straight-line basis over the term of the lease. Fair Value of Financial Instruments The Company uses fair value measurements to record fair value adjustments to certain financial and non-financial assets and liabilities and to determine fair value disclosures. The accounting standards define fair value, establish a framework for measuring fair value, and require disclosures about fair value measurements. 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. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the principal or most advantageous market in which the Company would transact are considered along with assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. The accounting standard for fair value establishes a fair value hierarchy based on three levels of inputs, the first two of which are considered observable and the last unobservable, that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that may be used to measure fair value are as follows: Level 1: Observable inputs, such as quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3: Valuations based on unobservable inputs to the valuation methodology and including data about assumptions that market participants would use in pricing the asset or liability based on the best information available under the circumstances. Financial instruments carried at fair value include cash, cash equivalents, and marketable securities. The carrying amount of accounts receivable, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities. Revenue Recognition The Company’s sole source of revenue is grant revenue related to a $19.8 million research grant received from the Cancer Prevention and Research Institute of Texas (“CPRIT”), covering a four-year period from June 1, 2014 through May 31, 2018. Grant revenue is recognized when qualifying costs are incurred and there is reasonable assurance that the conditions of the award have been met for collection. Proceeds received prior to the costs being incurred or the conditions of the award being met are recognized as deferred revenue until the services are performed and the conditions of the award are met (see Note 5). Research and Development Costs Research and development costs are expensed as incurred. Research and development costs include, but are not limited to, salaries, benefits, travel, stock-based compensation, consulting costs, contract research service costs, laboratory supplies and facilities, contract manufacturing costs, and costs paid to other third parties that conduct research and development activities on the Company’s behalf. Amounts incurred in connection with license agreements are also included in research and development expense. Certain research and development costs incurred were settled contractually by the Company issuing a variable number of the Company’s shares determined by dividing the fixed monetary amount of costs incurred by the issuance-date fair value of the issuable shares. The Company recorded research and development expense for these costs and accrued for the fixed monetary amount as an accrued liability as the services were rendered until the amount was settled. In June 2015, the remaining Company obligation to settle these costs with Company shares was converted to a cash-based payment through a contract amendment with the service provider. Advance payments for goods or services to be rendered in the future for use in research and development activities are recorded as a prepaid asset and expensed as the related goods are delivered or the services are performed. Stock-Based Compensation The Company recognizes the cost of stock-based awards granted to employees based on the estimated grant-date fair values of the awards. The value of the award is recognized as compensation expense on a straight-line basis over the requisite service period. Forfeitures are recognized when they occur, which may result in the reversal of compensation costs in subsequent periods as the forfeitures arise. The Company recognizes the cost of stock-based awards granted to nonemployees at their then-current fair values as services are performed, and are remeasured through the counterparty performance date. Income Taxes The Company and its seven wholly-owned subsidiary corporations use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial statements and the tax bases of assets and liabilities. Additionally, any changes in income tax laws are immediately recognized in the year of enactment. A valuation allowance is established against the deferred tax assets to reduce their carrying value to an amount that is more likely than not to be realized. The deferred tax assets and liabilities are classified as noncurrent along with the related valuation allowance. Due to a lack of earnings history, the net deferred tax assets have been fully offset by a valuation allowance. The Company recognizes benefits of uncertain tax positions if it is more likely than not that such positions will be sustained upon examination based solely on the technical merits, as the largest amount of benefits that is more likely than not to be realized upon the ultimate settlement. The Company’s policy is to recognize interest and penalties related to the unrecognized tax benefits as a component of income tax expense. Comprehensive Loss Comprehensive loss is the change in stockholders’ equity from transactions and other events and circumstances other than those resulting from investments by stockholders and distributions to stockholders. The Company’s other comprehensive income (loss) is currently comprised of changes in unrealized gains and losses on available-for-sale securities. Recent Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) In June 2018, the FASB issued ASU No. 2018-07, Compensation – Stock Compensation (Topic 718) |
Cash Equivalents and Marketable
Cash Equivalents and Marketable Securities | 6 Months Ended |
Jun. 30, 2018 | |
Investments Debt And Equity Securities [Abstract] | |
Cash Equivalents and Marketable Securities | 3. Cash Equivalents and Marketable Securities The following tables summarize the estimated fair value of the Company’s cash equivalents and marketable securities and the gross unrealized gains and losses (in thousands): June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash equivalents: Money market funds $ 6,807 $ — $ — $ 6,807 Reverse repurchase agreements 6,250 — — 6,250 Commercial paper 5,990 1 — 5,991 Total cash equivalents 19,047 1 — 19,048 Marketable securities: Commercial paper 25,927 8 (1 ) 25,934 U.S. government securities 25,743 — (63 ) 25,680 Total marketable securities $ 51,670 $ 8 $ (64 ) $ 51,614 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash equivalents: Money market funds $ 1,674 $ — $ — $ 1,674 Reverse repurchase agreements 7,250 — — 7,250 Total cash equivalents 8,924 — — 8,924 Marketable securities: U.S. treasury securities 1,502 — (1 ) 1,501 U.S. government securities 36,082 — (101 ) 35,981 Total marketable securities $ 37,584 $ — $ (102 ) $ 37,482 The reverse repurchase agreements are settled in cash nightly, and as such are classified as cash equivalents. As of June 30, 2018 and December 31, 2017, all debt securities with an unrealized loss position have been in a loss position for less than one year. The aggregate fair value of debt securities in an unrealized loss position as of June 30, 2018 and December 31, 2017 were $32.8 million and $37.5 million, respectively, with no individual securities in a significant unrealized loss position. The Company evaluated its securities for other-than-temporary impairment and considered the decline in market value for the securities to be primarily attributable to current economic and market conditions and would not be required to sell the securities before recovery of the amortized cost basis. Based on this analysis, these marketable securities were not considered to be other-than-temporarily impaired as of June 30, 2018 and December 31, 2017. The following tables summarizes the contractual maturities of the Company’s marketable securities at estimated fair value (in thousands): June 30, December 31, 2018 2017 Due in one year or less $ 51,614 $ 34,498 Due in 1 - 2 years — 2,984 Total marketable securities $ 51,614 $ 37,482 The Company may sell investments at any time for use in current operations even if they have not yet reached maturity. As a result, the Company classifies marketable securities, including securities with maturities beyond twelve months as current assets. |
Accrued and Other Current Liabi
Accrued and Other Current Liabilities | 6 Months Ended |
Jun. 30, 2018 | |
Accrued Liabilities And Other Liabilities [Abstract] | |
Accrued and Other Current Liabilities | 4. Accrued and Other Current Liabilities Accrued and other current liabilities consist of the following (in thousands): June 30, December 31, 2018 2017 Accrued compensation $ 1,370 $ 1,837 Accrued contracted research and development costs 3,155 2,552 Accrued professional and consulting fees 623 672 Accrued other and other current liabilities 75 159 Total accrued and other current liabilities $ 5,223 $ 5,220 |
Grant Revenues
Grant Revenues | 6 Months Ended |
Jun. 30, 2018 | |
Grant Revenues [Abstract] | |
Grant Revenues | 5. Grant Revenues In June 2015, the Company entered into a Cancer Research Grant Contract (“Grant Contract”) with CPRIT, under which CPRIT awarded a grant not to exceed $19.8 million for use in developing cancer treatments by exploiting the metabolism of cancer cells. The Grant Contract covers a four-year period from June 1, 2014 through May 31, 2018. Upon commercialization of the product, the terms of the Grant Contract require the Company to pay tiered royalties in the low to mid-single digit percentages. Such royalties reduce to less than one percent after a mid-single-digit multiple of the grant funds have been paid to CPRIT as royalties. The Company recognized grant revenue of $2.4 million and $1.5 million in the three months ended June 30, 2018 and 2017, respectively, and $3.9 million and $2.5 million in the six months ended June 30, 2018 and 2017, respectively, for qualified expenditures under the grant. As of June 30, 2018 and December 31, 2017, the Company had outstanding grant receivables of $4.3 million and $3.1 million, respectively, for the grant expenditures that were paid but had not been reimbursed and deferred revenue of $0 and $20,000, respectively, for proceeds received but for which the costs had not been incurred or the conditions of the award had not been met. |
Stock-Based Compensation
Stock-Based Compensation | 6 Months Ended |
Jun. 30, 2018 | |
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |
Stock-Based Compensation | 6. Stock-Based Compensation On February 20, 2018, the Board of Directors approved and adopted the 2018 Equity Inducement Plan (“2018 Plan”) which became effective on the same date. The Board of Directors approved an initial reserve of 1,100,000 shares of common stock to be used exclusively for individuals who were not previously employees or directors, or following a bona fide period of non-employment, as an inducement material to the individual entering into employment with the Company. Nonqualified stock options or restricted stock units may be granted under the 2018 Plan at the discretion of the Compensation Committee or the Board of Directors. The Company did not seek stockholder approval of the 2018 Plan pursuant to Nasdaq Rule 5635(c)(4). The 2016 Equity Incentive Plan (“2016 Plan”) provides for an annual increase in the number of shares available for issuance thereunder, to be added on the first day of each fiscal year, beginning on January 1, 2017 and continuing through 2023, up to 4% of the outstanding number of shares of the Company’s common stock on the December 31 immediately prior to the date of increase, provided that an increase is only effective if the Company’s board of directors either confirmed the increase or approved the increase of a lesser number of shares prior to January 1 of each relevant year As of June 30, 2018, the 2016 Plan had 203,906 shares available for future issuance. During the three months ended June 30, 2018 and 2017, the Company issued an aggregate of 203,600 and 244,100 options to purchase common stock, respectively, under the 2016 Plan and 2018 Plan for an aggregate fair value of $1.5 million and $713,000, respectively. During the six months ended June 30, 2018 and 2017, the Company issued an aggregate of 1,033,100 and 1,016,900 options to purchase common stock, respectively, under the 2016 Plan and 2018 Plan for an aggregate fair value of $5.4 million and $4.9 million, respectively. There were no shares issued and sold under the Company’s 2016 Employee Stock Purchase Plan (“2016 ESPP”) during the three months ended June 30, 2018 and 2017. The Company issued and sold 30,937 shares for aggregate cash proceeds of $78,000 during the six months ended June 30, 2018 and 18,184 shares for aggregate cash proceeds of $78,000 during the six months ended June 30, 2017. Total stock-based compensation expense related to the Company’s equity incentive plans, 2018 Plan, and 2016 ESPP was as follows (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Research and development $ 390 $ 285 $ 713 $ 395 General and administrative 606 381 1,118 671 Total stock-based compensation expense $ 996 $ 666 $ 1,831 $ 1,066 The following table summarizes the weighted-average Black-Scholes option pricing model assumptions used to estimate the fair value of stock options granted under the 2016 Plan and 2018 Plan, and the shares purchasable under the 2016 ESPP during the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 2016 Plan and 2018 Plan Expected term 5.70 5.96 5.95 5.99 Expected volatility 84 % 86 % 85 % 86 % Risk-free interest 2.79 % 1.87 % 2.73 % 2.07 % Dividend yield 0 % 0 % 0 % 0 % 2016 ESPP Expected term — — 0.49 0.50 Expected volatility — — 69 % 79 % Risk-free interest — — 2.00 % 0.68 % Dividend yield — — 0 % 0 % |
Fair Value Measurements
Fair Value Measurements | 6 Months Ended |
Jun. 30, 2018 | |
Fair Value Disclosures [Abstract] | |
Fair Value Measurements | 7. Fair Value Measurements The Company measures and reports certain financial instruments as assets and liabilities at fair value on a recurring basis. The following tables sets forth the fair value of the Company’s financial assets and liabilities at fair value on a recurring basis based on the three-tier fair value hierarchy (in thousands): June 30, 2018 Level 1 Level 2 Level 3 Total Financial Assets Money market funds $ 6,807 $ — $ — $ 6,807 Reverse repurchase agreements — 6,250 — 6,250 Commercial paper — 31,925 — 31,925 U.S. government securities — 25,680 — 25,680 Total financial assets $ 6,807 $ 63,855 $ — $ 70,662 December 31, 2017 Level 1 Level 2 Level 3 Total Financial Assets Money market funds $ 1,674 $ — $ — $ 1,674 Reverse repurchase agreements — 7,250 — 7,250 U.S. treasury securities 1,501 — — 1,501 U.S. government securities — 35,981 — 35,981 Total financial assets $ 3,175 $ 43,231 $ — $ 46,406 The Company measures the fair value of money market funds on quoted prices in active markets for identical asset or liabilities. The Level 2 assets include reverse repurchase agreements and U.S. government securities and are valued based on quoted prices for similar assets in active markets and inputs other than quoted prices that are derived from observable market data. The Company evaluates transfers between levels at the end of each reporting period. There were no transfers between Level 1 and Level 2 during the periods presented. |
Net Loss Per Share
Net Loss Per Share | 6 Months Ended |
Jun. 30, 2018 | |
Earnings Per Share [Abstract] | |
Net Loss Per Share | 8. Net Loss Per Share Basic and diluted net loss per share is computed by dividing net loss by the weighted-average number of common stock outstanding during the period. For periods in which the Company generated a net loss, the Company does not include the potential impact of dilutive securities in diluted net loss per share, as the impact of these items is anti-dilutive. The following weighted-average equity instruments were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Unvested restricted common stock 30,408 63,431 31,233 68,693 Options to purchase common stock 3,015,991 1,894,831 2,856,763 1,618,721 |
Research and License Agreements
Research and License Agreements | 6 Months Ended |
Jun. 30, 2018 | |
Licensing Agreements [Abstract] | |
Research and License Agreements | 9. Research and License Agreements University Research Agreement In December 2013, the Company entered into a research agreement with the University of Texas at Austin (the “University”). Under the terms of this research agreement, the Company engaged the University to perform certain nonclinical research activities related to the systemic depletion of amino acids for cancer and rare disease therapy. Under the research agreement, the Company was required to pay the University an annual amount not to exceed $386,000 during the one-year term of the agreement from the effective date. Pursuant to subsequent amendments to the research agreement, the term and maximum expenditure limitation were extended and increased through August 31, 2018 for a combined amount of $2.5 million. For the three months ended June 30, 2018, the Company did not make any payments to the University under the research agreement. During the three months ended June 30, 2017, the Company made payments of $188,000. For the six months ended June 30, 2018 and 2017, the Company paid $188,000 and $375,000, respectively, to the University under the research agreement. License Agreements In December 2013, two of the Company’s wholly owned subsidiaries, AECase, Inc. (“AECase”) and AEMase, Inc. (“AEMase”), entered into license agreements with the University under which the University granted to AECase and AEMase exclusive, worldwide, sublicenseable licenses. The University granted the AECase license under a patent application relating to the right to use technology related to the Company’s AEB3103 product candidate. The University granted the AEMase license under a patent relating to the right to use technology related to the Company’s AEB2109 product candidate. In January and December 2017, the Company entered into and subsequently amended an Amended and Restated Patent License Agreement (the “Restated License”) with the University which consolidated the two license agreements, revised certain obligations, and licensed additional patent applications and invention disclosures to the Company. Pursuant to the terms of the Restated License, the Company may be required to pay the University up to $6.4 million milestone payments based on the achievement of certain development milestones, including clinical trials and regulatory approvals, the majority of which are due upon the achievement of later development milestones, including a $5.0 million payment due on regulatory approval of a product and a $500,000 payment payable on final regulatory approval of a product for a second indication. In addition, the Company is required to pay the University a low single-digit royalty on worldwide-net sales of products covered under the Restated License, together with a revenue share on non-royalty consideration received from sublicensees. The rate of the revenue share ranges from 6.5% to 25% depending on the date the sublicense agreement is signed. |
Related Party Transactions
Related Party Transactions | 6 Months Ended |
Jun. 30, 2018 | |
Related Party Transactions [Abstract] | |
Related Party Transactions | 10. Related Party Transactions One of the founders, a non-employee member of the Company’s board of directors, entered into a consulting agreement with the Company in 2014 under which the founder would receive $50,000 per year for a fixed number of hours of consulting and advisory services and receive equity incentive shares, which converted into 43,290 restricted stock awards and 13,852 stock options upon the LLC Conversion, with the vesting contingent on time and performance milestones being achieved. For the six months ended June 30, 2018, there were no payments made to the Founder under the consulting agreement. For the six months ended June 30, 2017, there were $25,000 in payments made to the Founder under the consulting agreement. As of June 30, 2018 and December 31, 2017, the Company had no outstanding liability to the related party. |
Summary of Significant Accoun17
Summary of Significant Accounting Policies (Policies) | 6 Months Ended |
Jun. 30, 2018 | |
Accounting Policies [Abstract] | |
Use of Estimates | Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such management estimates include those related to accruals of research and development related costs, stock-based compensation, and certain company income tax related items. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions that management believes to be reasonable under the circumstances. Actual results could differ significantly from those estimates. |
Cash and Cash Equivalents | Cash and Cash Equivalents The Company considers all highly liquid investments with original maturities of three months or less from the date of purchase to be cash equivalents. Cash equivalents consist of money market funds and debt securities and are stated at fair value. |
Marketable Securities | Marketable Securities All investments have been classified as available-for-sale and are carried at estimated fair value as determined based upon quoted market prices or pricing models for similar securities. Management determines the appropriate classification of its investments in debt securities at the time of purchase. The Company may or may not hold securities with stated maturities greater than one year until maturity. All available-for-sale securities are considered available to support current operations and are classified as current assets. Unrealized gains and losses are excluded from earnings and are reported as a component of accumulated comprehensive loss. Realized gains and losses and declines in fair value judged to be other than temporary, if any, on available-for-sale securities are included in other income (expense). The cost of securities sold is based on the specific-identification method. There were no realized gains or losses on marketable securities for the six months ended June 30, 2018 and 2017 . Interest on marketable securities is included in interest |
Concentration of Credit Risk | Concentration of Credit Risk Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, and marketable securities. The Company’s investment policy limits investments to high credit quality securities issued by the U.S. government, U.S. government-sponsored agencies and highly rated banks, subject to certain concentration limits and restrictions on maturities. The Company’s cash, cash equivalents, and marketable securities are held by financial institutions in the United States that management believes are of high credit quality. Amounts on deposit may at times exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents and its accounts are monitored by management to mitigate risk. The Company is exposed to credit risk in the event of default by the financial institutions holding its cash and cash equivalents and bond issuers. |
Property and Equipment | Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. Repairs and maintenance that do not extend the life or improve an asset are expensed as incurred. Upon retirement or sale, the cost of disposed assets and their related accumulated depreciation and amortization are removed from the balance sheet. Any gain or loss is credited or charged to operations. The useful lives of the property and equipment are as follows: Laboratory equipment 5 years Furniture and office equipment 5 years Computer equipment 3 years Software 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life |
Impairment of Long-Lived Assets | Impairment of Long-Lived Assets Long-lived assets are reviewed for indications of possible impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is measured by comparison of the carrying amounts to the future undiscounted cash flows attributable to these assets. An impairment loss is recognized to the extent an asset group is not recoverable, and the carrying amount exceeds the projected discounted future cash flows arising from these assets. There were no impairments of long-lived assets for the six months ended June 30, 2018 and 2017. |
Accrued Research And Development Costs | Accrued Research and Development Costs The Company records the costs associated with research nonclinical studies, clinical trials, and manufacturing development as incurred. These costs are a significant component of the Company’s research and development expenses, with a substantial portion of the Company’s on-going research and development activities conducted by third-party service providers, including contract research and manufacturing organizations. The Company accrues for expenses resulting from obligations under agreements with contract research organizations (“CROs”), contract manufacturing organizations (“CMOs”), and other outside service providers for which payment flows do not match the periods over which materials or services are provided to the Company. Accruals are recorded based on estimates of services received and efforts expended pursuant to agreements established with CROs, CMOs, and other outside service providers. These estimates are typically based on contracted amounts applied to the proportion of work performed and determined through analysis with internal personnel and external service providers as to the progress or stage of completion of the services. The Company makes significant judgments and estimates in determining the accrual balance in each reporting period. In the event advance payments are made to a CRO, CMO, or outside service provider, the payments will be recorded as a prepaid asset which will be amortized as the contracted services are performed. As actual costs become known, the Company adjusts its accruals. Inputs, such as the services performed, the number of patients enrolled, or the study duration, may vary from the Company’s estimates, resulting in adjustments to research and development expense in future periods. Changes in these estimates that result in material changes to the Company’s accruals could materially affect the Company’s results of operations. The Company has not experienced any material deviations between accrued and actual research and development expenses. |
Leases | Leases The Company entered into lease agreements for its office and laboratory facilities. The leases are classified as operating leases. The Company records rent expense on a straight-line basis over the term of the leases and, accordingly records the difference between cash rent payments and the recognition of rent expense as a deferred rent liability. Incentives granted under the Company’s facilities leases, including allowances to fund leasehold improvements, are deferred and are recognized as adjustments to rental expense on a straight-line basis over the term of the lease. |
Fair Value of Financial Instruments | Fair Value of Financial Instruments The Company uses fair value measurements to record fair value adjustments to certain financial and non-financial assets and liabilities and to determine fair value disclosures. The accounting standards define fair value, establish a framework for measuring fair value, and require disclosures about fair value measurements. 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. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the principal or most advantageous market in which the Company would transact are considered along with assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. The accounting standard for fair value establishes a fair value hierarchy based on three levels of inputs, the first two of which are considered observable and the last unobservable, that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that may be used to measure fair value are as follows: Level 1: Observable inputs, such as quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3: Valuations based on unobservable inputs to the valuation methodology and including data about assumptions that market participants would use in pricing the asset or liability based on the best information available under the circumstances. Financial instruments carried at fair value include cash, cash equivalents, and marketable securities. The carrying amount of accounts receivable, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities. |
Revenue Recognition | Revenue Recognition The Company’s sole source of revenue is grant revenue related to a $19.8 million research grant received from the Cancer Prevention and Research Institute of Texas (“CPRIT”), covering a four-year period from June 1, 2014 through May 31, 2018. Grant revenue is recognized when qualifying costs are incurred and there is reasonable assurance that the conditions of the award have been met for collection. Proceeds received prior to the costs being incurred or the conditions of the award being met are recognized as deferred revenue until the services are performed and the conditions of the award are met (see Note 5). |
Research and Development Costs | Research and Development Costs Research and development costs are expensed as incurred. Research and development costs include, but are not limited to, salaries, benefits, travel, stock-based compensation, consulting costs, contract research service costs, laboratory supplies and facilities, contract manufacturing costs, and costs paid to other third parties that conduct research and development activities on the Company’s behalf. Amounts incurred in connection with license agreements are also included in research and development expense. Certain research and development costs incurred were settled contractually by the Company issuing a variable number of the Company’s shares determined by dividing the fixed monetary amount of costs incurred by the issuance-date fair value of the issuable shares. The Company recorded research and development expense for these costs and accrued for the fixed monetary amount as an accrued liability as the services were rendered until the amount was settled. In June 2015, the remaining Company obligation to settle these costs with Company shares was converted to a cash-based payment through a contract amendment with the service provider. Advance payments for goods or services to be rendered in the future for use in research and development activities are recorded as a prepaid asset and expensed as the related goods are delivered or the services are performed. |
Stock-Based Compensation | Stock-Based Compensation The Company recognizes the cost of stock-based awards granted to employees based on the estimated grant-date fair values of the awards. The value of the award is recognized as compensation expense on a straight-line basis over the requisite service period. Forfeitures are recognized when they occur, which may result in the reversal of compensation costs in subsequent periods as the forfeitures arise. The Company recognizes the cost of stock-based awards granted to nonemployees at their then-current fair values as services are performed, and are remeasured through the counterparty performance date. |
Income Taxes | Income Taxes The Company and its seven wholly-owned subsidiary corporations use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial statements and the tax bases of assets and liabilities. Additionally, any changes in income tax laws are immediately recognized in the year of enactment. A valuation allowance is established against the deferred tax assets to reduce their carrying value to an amount that is more likely than not to be realized. The deferred tax assets and liabilities are classified as noncurrent along with the related valuation allowance. Due to a lack of earnings history, the net deferred tax assets have been fully offset by a valuation allowance. The Company recognizes benefits of uncertain tax positions if it is more likely than not that such positions will be sustained upon examination based solely on the technical merits, as the largest amount of benefits that is more likely than not to be realized upon the ultimate settlement. The Company’s policy is to recognize interest and penalties related to the unrecognized tax benefits as a component of income tax expense. |
Comprehensive Loss | Comprehensive Loss Comprehensive loss is the change in stockholders’ equity from transactions and other events and circumstances other than those resulting from investments by stockholders and distributions to stockholders. The Company’s other comprehensive income (loss) is currently comprised of changes in unrealized gains and losses on available-for-sale securities. |
Recent Accounting Pronouncements | Recent Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) In June 2018, the FASB issued ASU No. 2018-07, Compensation – Stock Compensation (Topic 718) |
Summary of Significant Accoun18
Summary of Significant Accounting Policies (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Accounting Policies [Abstract] | |
Schedule Of Estimated Useful Lives Of Property Plant And Equipment | The useful lives of the property and equipment are as follows: Laboratory equipment 5 years Furniture and office equipment 5 years Computer equipment 3 years Software 3 years Leasehold improvements Shorter of remaining lease term or estimated useful life |
Cash Equivalents and Marketab19
Cash Equivalents and Marketable Securities (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Investments Debt And Equity Securities [Abstract] | |
Schedule of Estimated Fair Value of Cash Equivalents and Marketable Securities | The following tables summarize the estimated fair value of the Company’s cash equivalents and marketable securities and the gross unrealized gains and losses (in thousands): June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash equivalents: Money market funds $ 6,807 $ — $ — $ 6,807 Reverse repurchase agreements 6,250 — — 6,250 Commercial paper 5,990 1 — 5,991 Total cash equivalents 19,047 1 — 19,048 Marketable securities: Commercial paper 25,927 8 (1 ) 25,934 U.S. government securities 25,743 — (63 ) 25,680 Total marketable securities $ 51,670 $ 8 $ (64 ) $ 51,614 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash equivalents: Money market funds $ 1,674 $ — $ — $ 1,674 Reverse repurchase agreements 7,250 — — 7,250 Total cash equivalents 8,924 — — 8,924 Marketable securities: U.S. treasury securities 1,502 — (1 ) 1,501 U.S. government securities 36,082 — (101 ) 35,981 Total marketable securities $ 37,584 $ — $ (102 ) $ 37,482 |
Summary of Contractual Maturities of Marketable Securities at Estimated Fair Value | The following tables summarizes the contractual maturities of the Company’s marketable securities at estimated fair value (in thousands): June 30, December 31, 2018 2017 Due in one year or less $ 51,614 $ 34,498 Due in 1 - 2 years — 2,984 Total marketable securities $ 51,614 $ 37,482 |
Accrued and Other Current Lia20
Accrued and Other Current Liabilities (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Accrued Liabilities And Other Liabilities [Abstract] | |
Accrued and Other Current Liabilities | Accrued and other current liabilities consist of the following (in thousands): June 30, December 31, 2018 2017 Accrued compensation $ 1,370 $ 1,837 Accrued contracted research and development costs 3,155 2,552 Accrued professional and consulting fees 623 672 Accrued other and other current liabilities 75 159 Total accrued and other current liabilities $ 5,223 $ 5,220 |
Stock-Based Compensation (Table
Stock-Based Compensation (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |
Summary of Stock-Based Compensation Expense | Total stock-based compensation expense related to the Company’s equity incentive plans, 2018 Plan, and 2016 ESPP was as follows (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Research and development $ 390 $ 285 $ 713 $ 395 General and administrative 606 381 1,118 671 Total stock-based compensation expense $ 996 $ 666 $ 1,831 $ 1,066 |
Schedule of Estimated Fair Value of Stock Options Granted | The following table summarizes the weighted-average Black-Scholes option pricing model assumptions used to estimate the fair value of stock options granted under the 2016 Plan and 2018 Plan, and the shares purchasable under the 2016 ESPP during the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 2016 Plan and 2018 Plan Expected term 5.70 5.96 5.95 5.99 Expected volatility 84 % 86 % 85 % 86 % Risk-free interest 2.79 % 1.87 % 2.73 % 2.07 % Dividend yield 0 % 0 % 0 % 0 % 2016 ESPP Expected term — — 0.49 0.50 Expected volatility — — 69 % 79 % Risk-free interest — — 2.00 % 0.68 % Dividend yield — — 0 % 0 % |
Fair Value Measurement (Tables)
Fair Value Measurement (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Fair Value Disclosures [Abstract] | |
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis | The following tables sets forth the fair value of the Company’s financial assets and liabilities at fair value on a recurring basis based on the three-tier fair value hierarchy (in thousands): June 30, 2018 Level 1 Level 2 Level 3 Total Financial Assets Money market funds $ 6,807 $ — $ — $ 6,807 Reverse repurchase agreements — 6,250 — 6,250 Commercial paper — 31,925 — 31,925 U.S. government securities — 25,680 — 25,680 Total financial assets $ 6,807 $ 63,855 $ — $ 70,662 December 31, 2017 Level 1 Level 2 Level 3 Total Financial Assets Money market funds $ 1,674 $ — $ — $ 1,674 Reverse repurchase agreements — 7,250 — 7,250 U.S. treasury securities 1,501 — — 1,501 U.S. government securities — 35,981 — 35,981 Total financial assets $ 3,175 $ 43,231 $ — $ 46,406 |
Net Loss Per Share (Tables)
Net Loss Per Share (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Earnings Per Share [Abstract] | |
Weighted-Average Equity Instruments Excluded from Calculation of Diluted Net Loss Per Share | The following weighted-average equity instruments were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Unvested restricted common stock 30,408 63,431 31,233 68,693 Options to purchase common stock 3,015,991 1,894,831 2,856,763 1,618,721 |
The Company and Basis of Pres24
The Company and Basis of Presentation - Additional Information (Details) | 1 Months Ended | 6 Months Ended | |
Apr. 30, 2018USD ($)$ / sharesshares | Jun. 30, 2018USD ($)Segment | Dec. 31, 2017USD ($) | |
Organization Consolidation And Presentation Of Financial Statements [Line Items] | |||
Number of operating segments | Segment | 1 | ||
Working capital | $ 72,700,000 | ||
Accumulated deficit | (90,046,000) | $ (72,513,000) | |
Cash, cash equivalents and marketable securities | 72,200,000 | ||
Common Stock | |||
Organization Consolidation And Presentation Of Financial Statements [Line Items] | |||
Number of shares issued | shares | 5,046,510 | ||
Public offering price | $ / shares | $ 8 | ||
Proceeds from issuance of common stock upon initial public offering, net | $ 37,700,000 | ||
Underwriting discounts and commissions | 2,400,000 | ||
Offering costs | $ 300,000 | ||
Common Stock | Outstanding Liability | |||
Organization Consolidation And Presentation Of Financial Statements [Line Items] | |||
Offering costs payable | $ 36,000 | ||
Common Stock | Underwriters' Over-allotment Option | |||
Organization Consolidation And Presentation Of Financial Statements [Line Items] | |||
Number of shares issued | shares | 546,510 |
Summary of Significant Accoun25
Summary of Significant Accounting Policies - Additional Information (Details) | Jun. 01, 2014USD ($) | Jun. 30, 2018USD ($)Subsidary | Jun. 30, 2017USD ($) |
Summary Of Significant Accounting Policies [Line Items] | |||
Marketable Securities, Realized Gain (Loss) | $ 0 | $ 0 | |
Impairments of long-lived assets | $ 0 | $ 0 | |
Number of subsidiary corporations owned | Subsidary | 7 | ||
Maximum | |||
Summary Of Significant Accounting Policies [Line Items] | |||
Marketable securities stated maturity period | 1 year | ||
Maximum | CPRIT | |||
Summary Of Significant Accounting Policies [Line Items] | |||
Research grant contract amount | $ 19,800,000 |
Summary of Significant Accoun26
Summary of Significant Accounting Policies - Summary of Useful Lives of Property and Equipment (Details) | 6 Months Ended |
Jun. 30, 2018 | |
Laboratory Equipment | |
Property Plant And Equipment [Line Items] | |
Useful lives of the property and equipment | 5 years |
Furniture and Office Equipment | |
Property Plant And Equipment [Line Items] | |
Useful lives of the property and equipment | 5 years |
Computer Equipment | |
Property Plant And Equipment [Line Items] | |
Useful lives of the property and equipment | 3 years |
Software | |
Property Plant And Equipment [Line Items] | |
Useful lives of the property and equipment | 3 years |
Leasehold Improvements | |
Property Plant And Equipment [Line Items] | |
Useful lives of the property and equipment | Shorter of remaining lease term or estimated useful life |
Cash Equivalents and Marketab27
Cash Equivalents and Marketable Securities - Schedule of Estimated Fair Value of Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 |
Schedule Of Available For Sale Securities [Line Items] | ||
Cash equivalents, amortized cost | $ 19,047 | $ 8,924 |
Cash equivalents, estimated fair value | 19,048 | 8,924 |
Marketable securities, amortized cost | 51,670 | 37,584 |
Marketable securities, gross unrealized gains | 8 | |
Marketable securities, gross unrealized losses | (64) | (102) |
Marketable securities, estimated fair value | 51,614 | 37,482 |
Money market funds | ||
Schedule Of Available For Sale Securities [Line Items] | ||
Cash equivalents, amortized cost | 6,807 | 1,674 |
Cash equivalents, estimated fair value | 6,807 | 1,674 |
Reverse repurchase agreements | ||
Schedule Of Available For Sale Securities [Line Items] | ||
Cash equivalents, amortized cost | 6,250 | 7,250 |
Cash equivalents, estimated fair value | 6,250 | 7,250 |
Commercial paper | ||
Schedule Of Available For Sale Securities [Line Items] | ||
Cash equivalents, amortized cost | 5,990 | |
Cash equivalents, estimated fair value | 5,991 | |
Commercial paper | ||
Schedule Of Available For Sale Securities [Line Items] | ||
Marketable securities, amortized cost | 25,927 | |
Marketable securities, gross unrealized gains | 8 | |
Marketable securities, gross unrealized losses | (1) | |
Marketable securities, estimated fair value | 25,934 | |
U.S. treasury securities | ||
Schedule Of Available For Sale Securities [Line Items] | ||
Marketable securities, amortized cost | 1,502 | |
Marketable securities, gross unrealized losses | (1) | |
Marketable securities, estimated fair value | 1,501 | |
U.S. government securities | ||
Schedule Of Available For Sale Securities [Line Items] | ||
Marketable securities, amortized cost | 25,743 | 36,082 |
Marketable securities, gross unrealized losses | (63) | (101) |
Marketable securities, estimated fair value | $ 25,680 | $ 35,981 |
Cash Equivalents and Marketab28
Cash Equivalents and Marketable Securities - Additional Information (Details) - U.S. government and agency securities $ in Millions | Jun. 30, 2018USD ($)Security | Dec. 31, 2017USD ($)Security |
Cash Equivalents And Marketable Securities [Line Items] | ||
Fair value of debt securities in an unrealized loss position | $ | $ 32.8 | $ 37.5 |
Number of securities in a significant unrealized loss position | Security | 0 | 0 |
Cash Equivalents and Marketab29
Cash Equivalents and Marketable Securities - Summary of Contractual Maturities of Marketable Securities at Estimated Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 |
Investments Debt And Equity Securities [Abstract] | ||
Due in one year or less | $ 51,614 | $ 34,498 |
Due in 1 - 2 years | 2,984 | |
Total marketable securities | $ 51,614 | $ 37,482 |
Accrued and Other Current Lia30
Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 |
Accrued Liabilities And Other Liabilities [Abstract] | ||
Accrued compensation | $ 1,370 | $ 1,837 |
Accrued contracted research and development costs | 3,155 | 2,552 |
Accrued professional and consulting fees | 623 | 672 |
Accrued other and other current liabilities | 75 | 159 |
Total accrued and other current liabilities | $ 5,223 | $ 5,220 |
Grant Revenues - Additional Inf
Grant Revenues - Additional Information (Details) - USD ($) | Jun. 01, 2014 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 |
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Grant revenues | $ 2,378,000 | $ 1,479,000 | $ 3,888,000 | $ 2,462,000 | ||
Type of revenue [extensible list] | us-gaap:GrantMember | us-gaap:GrantMember | us-gaap:GrantMember | us-gaap:GrantMember | ||
Outstanding grant receivable | $ 4,281,000 | $ 4,281,000 | $ 3,078,000 | |||
Deferred revenue | $ 0 | $ 0 | $ 20,000 | |||
CPRIT | ||||||
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Grant contract term | 4 years | |||||
Grant contract beginning date | Jun. 1, 2014 | |||||
Grant contract expiration date | May 31, 2018 | |||||
CPRIT | Maximum | ||||||
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Research grant contract amount | $ 19,800,000 |
Stock-Based Compensation - Addi
Stock-Based Compensation - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended | |||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Feb. 20, 2018 | Jan. 01, 2018 | Jan. 01, 2017 | |
2018 Equity Inducement Plan | |||||||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||||||
Initial reserves of common stock | 1,100,000 | ||||||
2016 Equity Incentive Plan | |||||||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||||||
Percentage of outstanding share of common stock | 4.00% | ||||||
Additional number of shares available for issuance | 666,807 | 537,233 | |||||
Common stock available for future issuance | 203,906 | 203,906 | |||||
2016 Equity Incentive Plan and 2018 Equity Inducement Plan | Stock Options | |||||||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||||||
Stock option to purchase an aggregate of common stock shares | 203,600 | 244,100 | 1,033,100 | 1,016,900 | |||
Stock options to purchase common stock aggregate fair value | $ 1,500,000 | $ 713,000 | $ 5,400,000 | $ 4,900,000 | |||
2016 Employee Stock Purchase Plan | |||||||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||||||
Stock option to purchase an aggregate of common stock shares | 0 | 0 | 30,937 | 18,184 | |||
Aggregate cash proceeds from sale of shares | $ 78,000 | $ 78,000 |
Stock-Based Compensation - Summ
Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) - 2018 Equity Inducement Plan and 2016 Employee Stock Purchase Plan - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] | ||||
Total stock-based compensation expense | $ 996 | $ 666 | $ 1,831 | $ 1,066 |
Research and Development | ||||
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] | ||||
Total stock-based compensation expense | 390 | 285 | 713 | 395 |
General and Administrative | ||||
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] | ||||
Total stock-based compensation expense | $ 606 | $ 381 | $ 1,118 | $ 671 |
Stock-Based Compensation - Sche
Stock-Based Compensation - Schedule of Estimate Fair Value of Stock Options Granted (Details) | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
2016 Plan and 2018 Plan | ||||
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] | ||||
Expected term | 5 years 8 months 12 days | 5 years 11 months 15 days | 5 years 11 months 12 days | 5 years 11 months 26 days |
Expected volatility | 84.00% | 86.00% | 85.00% | 86.00% |
Risk-free interest | 2.79% | 1.87% | 2.73% | 2.07% |
Dividend yield | 0.00% | 0.00% | 0.00% | 0.00% |
2016 Employee Stock Purchase Plan | ||||
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] | ||||
Expected term | 5 months 26 days | 6 months | ||
Expected volatility | 69.00% | 79.00% | ||
Risk-free interest | 2.00% | 0.68% | ||
Dividend yield | 0.00% | 0.00% |
Fair Value Measurements - Finan
Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 |
Financial Assets | ||
Financial assets, fair value | $ 70,662 | $ 46,406 |
U.S. treasury securities | ||
Financial Assets | ||
Financial assets, fair value | 1,501 | |
Commercial paper | ||
Financial Assets | ||
Financial assets, fair value | 31,925 | |
Money market funds | ||
Financial Assets | ||
Financial assets, fair value | 6,807 | 1,674 |
Reverse repurchase agreements | ||
Financial Assets | ||
Financial assets, fair value | 6,250 | 7,250 |
U.S. government securities | ||
Financial Assets | ||
Financial assets, fair value | 25,680 | 35,981 |
Level 1 | ||
Financial Assets | ||
Financial assets, fair value | 6,807 | 3,175 |
Level 1 | U.S. treasury securities | ||
Financial Assets | ||
Financial assets, fair value | 1,501 | |
Level 1 | Money market funds | ||
Financial Assets | ||
Financial assets, fair value | 6,807 | 1,674 |
Level 2 | ||
Financial Assets | ||
Financial assets, fair value | 63,855 | 43,231 |
Level 2 | Commercial paper | ||
Financial Assets | ||
Financial assets, fair value | 31,925 | |
Level 2 | Reverse repurchase agreements | ||
Financial Assets | ||
Financial assets, fair value | 6,250 | 7,250 |
Level 2 | U.S. government securities | ||
Financial Assets | ||
Financial assets, fair value | $ 25,680 | $ 35,981 |
Fair Value Measurements - Addit
Fair Value Measurements - Additional Information (Details) | Jun. 30, 2018USD ($) |
Fair Value Disclosures [Abstract] | |
Fair value assets transferred from level 1 to level 2 | $ 0 |
Net Loss Per Share - Weighted-A
Net Loss Per Share - Weighted-Average Equity Instruments Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Unvested Restricted Common Stock | ||||
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||||
Antidilutive securities excluded from computation of earnings per share | 30,408 | 63,431 | 31,233 | 68,693 |
Options to Purchase Common Stock | ||||
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||||
Antidilutive securities excluded from computation of earnings per share | 3,015,991 | 1,894,831 | 2,856,763 | 1,618,721 |
Research and License Agreemen38
Research and License Agreements - Additional Information (Detail) | 1 Months Ended | 3 Months Ended | 6 Months Ended | |||
Jan. 31, 2017USD ($)LicenseAgreement | Jun. 30, 2018USD ($) | Jun. 30, 2017USD ($) | Jun. 30, 2018USD ($) | Jun. 30, 2017USD ($) | Dec. 31, 2013USD ($) | |
University Research Agreement | ||||||
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Research agreement date | 2013-12 | |||||
Maximum allowable research and development expenses per year | $ 2,500,000 | $ 2,500,000 | $ 386,000 | |||
Research agreement expiration date | Aug. 31, 2018 | |||||
Payments pursuant to research agreements | $ 0 | $ 188,000 | $ 188,000 | $ 375,000 | ||
License Agreements | ||||||
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Research agreement date | 2013-12 | |||||
Number of license agreements | LicenseAgreement | 2 | |||||
Maximum future contingent license payment | $ 6,400,000 | |||||
Aggregate potential milestone payments for receipt of regulatory approval | 5,000,000 | |||||
Aggregate potential milestone payments for final regulatory approval of second indication | $ 500,000 | |||||
License Agreements | Minimum [Member] | ||||||
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Rate of revenue share | 6.50% | |||||
License Agreements | Maximum | ||||||
Research And Development Arrangement Contract To Perform For Others [Line Items] | ||||||
Rate of revenue share | 25.00% |
Related Party Transactions - Ad
Related Party Transactions - Additional Information (Details) - One Of The Founders - USD ($) | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | |
Related Party Transaction [Line Items] | |||
Annual consulting fees to company founder | $ 50,000 | ||
Consulting fees | 0 | $ 25,000 | |
Outstanding liability to related party | $ 0 | $ 0 | |
Stock Option | |||
Related Party Transaction [Line Items] | |||
Shares issued to related party converted into stock options | 13,852 | ||
Unvested Restricted Common Stock | |||
Related Party Transaction [Line Items] | |||
Shares issued to related party converted into restricted stock awards | 43,290 |