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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results may differ from those estimates.

Revenue Recognition

We analyze our collaboration agreements to assess whether such arrangements, or transactions between arrangement participants, involve joint operating activities performed by parties that are both active participants in the activities and exposed to significant risks and rewards dependent on the commercial success of such activities or are more akin to a vendor-customer relationship. In making this evaluation, we consider whether the activities of the collaboration are considered to be distinct and deemed to be within the scope of the collaboration guidance and those that are more reflective of a vendor-customer

relationship and, therefore, within the scope of the revenue with contracts with customer guidance. This assessment is performed throughout the life of the arrangement based on changes in the responsibilities of all parties in the arrangement.

For elements of collaboration arrangements that are not accounted for pursuant to the revenue from contracts with customer guidance, an appropriate recognition method is determined and applied consistently, generally by analogy to the revenue from contracts with customers guidance. Revenue from transactions with collaboration participants is presented apart from revenue with contracts with customers in our condensed consolidated statement of operations.

Amounts received prior to satisfying the revenue recognition criteria are recorded as deferred revenue in the condensed consolidated balance sheets. If the related performance obligation is expected to be satisfied within the next twelve months this will be classified in current liabilities. Unconditional rights to receive consideration in advance of performance are recorded as receivables and deferred revenue in the condensed consolidated balance sheets when we have a contractual right to bill and receive the payment, performance is expected to commence shortly and there is less than a year between billing and performance. Amounts recognized for satisfied performance obligations prior to the right to payment becoming unconditional are recorded as contract assets in the condensed consolidated balance sheets. If we expect to have an unconditional right to receive consideration in the next twelve months, this will be classified in current assets. A net contract asset or liability is presented for each contract with a customer.

For arrangements or transactions between arrangement participants determined to be within the scope of the contracts with customers guidance, we perform the following steps to determine the appropriate amount of revenue to be recognized as we fulfill our obligations: (i) identification of the promised goods or services in the contract; (ii) determination of whether the promised goods or services are performance obligations including whether they are distinct in the context of the contract; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations based on estimated selling prices; and (v) recognition of revenue when (or as) we satisfy each performance obligation.

At contract inception, we assess the goods or services promised in a contract with a customer and identifies those distinct goods and services that represent a performance obligation. A promised good or service may not be identified as a performance obligation if it is immaterial in the context of the contract with the customer, if it is not separately identifiable from other promises in the contract (either because it is not capable of being separated or because it is not separable in the context of the contract), or if the performance obligation does not provide the customer with a material right.

We consider the terms of the contract and our customary business practices to determine the transaction price. The transaction price is the amount of consideration to which we expect to be entitled in exchange for transferring promised goods or services to a customer. The consideration promised in a contract with a customer may include fixed amounts, variable amounts, or both. Variable consideration will only be included in the transaction price when it is not considered constrained, which is when it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur.

If it is determined that multiple performance obligations exist, the transaction price is allocated at the inception of the agreement to all identified performance obligations based on the relative stand-alone selling prices. The relative selling price for each deliverable is estimated using objective evidence if it is available. If objective evidence is not available, we use our best estimate of the selling price for the deliverable.

Revenue is recognized when, or as, we satisfy a performance obligation by transferring a promised good or service to a customer. An asset is transferred when, or as, the customer obtains control of that asset, which for a service, is considered to be as the services are received and used. We recognize revenue over time by measuring the progress toward complete satisfaction of the relevant performance obligation using an appropriate input or output method based on the nature of the good or service promised to the customer.

After contract inception, the transaction price is reassessed at every period end and updated for changes such as resolution of uncertain events. Any change in the transaction price is allocated to the performance obligations on the same basis as at contract inception.

Management may be required to exercise considerable judgment in estimating revenue to be recognized. Judgment is required in identifying performance obligations, estimating the transaction price, estimating the stand-alone selling prices of identified performance obligations, which may include forecasted revenue, development timelines, reimbursement rates for personnel costs, discount rates and probabilities of technical and regulatory success, and estimating the progress towards satisfaction of performance obligations.

Collaborative Arrangements

ASU 2018-18, Collaboration Arrangements: Clarifying the Interaction between Topic 808 and Topic 606 makes targeted improvements for collaborative arrangements by (1) clarifying that certain transactions between collaborative arrangement participants should be accounted for as revenue under Topic 606 when the collaboration arrangement participant is a customer, (2) adding unit of account guidance to assess whether the collaboration arrangement or a part of the arrangement is with a customer and (3) precluding a company from presenting transactions with collaboration arrangement participants that are not directly related to sales to third parties together with revenue from contracts with customers.

On January 1, 2019, we early adopted this new standard and its applicability has been considered in the accounting for our collaborative arrangement with Nippon Shinyaku Co., Ltd. (See Note 3).

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). Topic 842 establishes a right-of-use asset model that requires all lessees to recognize ROU assets and liabilities for leases with a duration greater than one year on the balance sheet as well as provide disclosures with respect to certain qualitative and quantitative information regarding the amount, timing and uncertainty of cash flows arising from leases.

On January 1, 2019, we adopted Topic 842 using the modified retrospective approach and elected the package of practical expedients permitted under transition guidance. Consequently, prior period financial information and related disclosures have not been adjusted and will continue to be presented in accordance with the previous lease standard. In addition, we elected the package of transition provisions available for existing contracts, which allowed us to carryforward our historical assessments of (1) whether contracts are or contain leases, (2) lease classification and (3) initial direct lease costs for existing leases. We did not elect the practical expedient allowing the use-of-hindsight which would require us to reassess the lease term of our leases based on all facts and circumstances through the effective date and did not elect the practical expedient pertaining to land easements as this is not applicable to the current contract portfolio.

The adoption of Topic 842 did not have a material impact on our condensed consolidated statements of operations and cash flows. The impact on the accompanying condensed consolidated balance sheet as of January 1, 2019 was as follows (in thousands):


	December 31, 2018		Adjustments Due to the Adoption of Topic 842		January 1, 2019
Assets
Operating lease right-of-use assets	$	—	$	8,641	$	8,641

Liabilities
Other accrued liabilities	1,845		(363)		$	1,482
Current portion of operating lease liabilities	—		1,058		1,058
Operating lease liabilities, net of current portion	—		11,776		11,776
Other long-term liabilities	3,830		(3,830)		—
Total	5,675		8,641		14,316

Upon adoption on January 1, 2019, we recorded operating lease ROU assets and lease liabilities of $8.6 million and $12.8 million, respectively, with the difference between ROU assets and lease liabilities attributed to the reclassifications of deferred rent and lease incentive obligations, a cease-use liability and initial direct leasing costs as a component of ROU assets.

Prior to January 1, 2019, we recognized related rent expense on a straight-line basis over the term of the lease. Incentives granted under our operating lease, including allowances for leasehold improvements and rent holidays, were recognized as reductions to rent expense on a straight-line basis over the term of the lease. Deferred rent consisted of the difference between rent expense recognized on a straight-line basis and cash rent payments. Subsequent to the adoption of Accounting Standards Update (ASU) 2016-02 and related amendments (collectively, Topic 842) on January 1, 2019, we determine whether the arrangement is or contains a lease at the inception of the arrangement and if such a lease is classified as a financing lease or operating lease at lease commencement. All of our leases are classified as operating leases. Leases with a term greater than one year are included in operating lease right-of-use assets (ROU asset), current portion of lease liabilities, and lease liabilities, net of current portion in our condensed consolidated balance sheet at March 31, 2019. If a lease contains an option to renew, the renewal option is included in the calculation of lease liabilities if we are reasonably certain at lease commencement the renewal option will be exercised. Lease liabilities and their corresponding ROU assets are measured at the present value of the remaining lease payments, discounted at an appropriate incremental borrowing rate at lease commencement, or as of January 1, 2019, for our existing leases. Management uses judgment to estimate the appropriate incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. Certain adjustments to the ROU asset may be required for items such as initial direct lease costs, lease incentives, scheduled rent escalations and impairment charges if we determine the ROU asset is impaired. Operating lease expense is recognized on a straight-line basis over the lease term.

We elected the post-transition practical expedient to not separate lease components from non-lease components for all existing lease classes. We also elected a policy of not recording leases on our condensed balance sheets when a lease has a term of one year or less.

In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification, amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. Additionally, the amendments expanded the disclosure requirements on the analysis of stockholders’ equity for interim financial statements. Under the amendments, a summary of changes in each caption of stockholders’ equity presented in the consolidated balance sheets must be provided in a note or separate statement. The final rule regarding stockholders’ equity was effective in the fourth quarter of 2018. The SEC provided relief on the effective date until the first quarter of 2019, and we have provided this disclosure beginning with this Quarterly Form 10-Q.

Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

On January 1, 2019, we early adopted this new standard and its applicability has been considered in the accounting for our collaborative arrangement with Nippon Shinyaku Co., Ltd. (See Note 3).

Leases


	December 31, 2018		Adjustments Due to the Adoption of Topic 842		January 1, 2019
Assets
Operating lease right-of-use assets	$	—	$	8,641	$	8,641

Liabilities
Other accrued liabilities	1,845		(363)		$	1,482
Current portion of operating lease liabilities	—		1,058		1,058
Operating lease liabilities, net of current portion	—		11,776		11,776
Other long-term liabilities	3,830		(3,830)		—
Total	5,675		8,641		14,316

Recent Accounting Pronouncements Not Yet Effective

ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments requires that certain financial assets be measured at amortized cost net of an allowance for estimated credit losses such that the net receivable represents the present value of expected cash collection. In addition, this standard update requires that certain financial assets be measured at amortized cost reflecting an allowance for estimated credit losses expected to occur over the life of the assets. The estimate of credit losses must be based on all relevant information including historical information, current conditions and reasonable and supportable forecasts that affect the collectability of the amounts. This standard update is effective for us on January 1, 2020 with early adoption permitted. We expect to adopt this ASU on January 1, 2020 and are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. Under the amendments in ASU 2017-04, an entity should recognize an impairment charge for the amount by which the carrying amount of a reporting unit exceeds its fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The updated guidance requires a prospective adoption. ASU 2017-04 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. We are currently evaluating the timing and effect that the updated standard will have on our consolidated financial statements and related disclosures.

ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement modifies the disclosure requirements in Topic 820, Fair Value Measurement, by removing certain disclosure requirements related to the fair value hierarchy, modifying existing disclosure requirements related to measurement uncertainty and adding new disclosure requirements, such as disclosing the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and disclosing the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This ASU is effective for public companies for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. Early adoption is permitted for any removed or modified disclosures. We are currently

evaluating the timing and effect that the updated standard will have on our consolidated financial statements and related disclosures.

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A three-level valuation hierarchy has been established under GAAP for disclosure of fair value measurements. The valuation hierarchy is based on the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows:


Level 1:			Observable inputs such as quoted prices in active markets;
Level 2:			Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and
Level 3:			Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

Our financial instruments consist primarily of cash and cash equivalents, marketable securities, accounts receivable, other current assets, accounts payable and accrued liabilities, contingent consideration liabilities and our outstanding common stock warrant liabilities. Certain cash equivalents, marketable securities, contingent consideration liabilities and common stock warrant liabilities are reported at their respective fair values on our condensed consolidated balance sheets. The remaining financial instruments are carried at cost which approximates their respective fair values because of the short-term nature of these financial instruments.

Stock-based Compensation

We have issued stock-based awards from various equity incentive and stock purchase plans, as more fully described in the consolidated financial statements and related notes included in our 2018 Annual Report on Form 10-K.

Under our 2010 Equity Incentive Award Plan, which was amended in June 2012 (2010 Plan), the aggregate number of shares of our common stock that may be issued as stock-based awards may not exceed 7,500,000 shares. At December 31, 2018, 1,550,351 shares were available for grant under the 2010 Plan. Pursuant to its evergreen provision, the number of shares reserved for issuance under the 2010 Plan automatically increases on January 1 of each year, commencing on January 1, 2013, and on each January 1 through and including January 1, 2020, in an amount equal to 4% of the total number of shares of common stock outstanding on December 31 of the preceding year, or a lesser number of shares as determined by our board of directors. On January 1, 2019, the increase in shares reserved for issuance pursuant to the evergreen provision was limited to 589,619 shares as the 2010 Plan’s maximum 7,500,000 shares reserved for issuance was reached. As of March 31, 2019, 1,298,107 shares were available for grant under the 2010 Plan.

In 2013, our board of directors adopted the Inducement Plan, which allows us to grant equity awards only to new employees as an inducement material to join us. Effective March 27, 2019, our board of directors approved an increase to the share reserve under the Inducement Plan by 100,000 shares resulting in the aggregate number of shares of our common stock that may be issued as stock-based awards to 737,500 shares. As of March 31, 2019, there were 124,925 shares available for grant under the Inducement Plan.

Net Loss per Share

Basic net loss from continuing operations per share is calculated by dividing net loss from continuing operations by the weighted average number of shares outstanding for the period. Diluted net loss from continuing operations per share is calculated by dividing net loss from continuing operations by the weighted average number of shares of common stock and potential dilutive common stock equivalents outstanding during the period if the effect is dilutive.