Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted in the United States of America for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, the condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of the Company for the periods presented. These condensed consolidated financial statements reflect the accounts and operations of the Company and those of its subsidiaries in which the Company has a controlling financial interest. Intercompany transactions and balances have been fully eliminated in consolidation. Results of the operations for the three and six months ended June 30, 2017 are not necessarily indicative of the results expected for the full fiscal year or for any future annual or interim period. These financial statements should be read in conjunction with the consolidated financial statements and related footnotes included in the Company’s Form S-1 covering the years ended December 31, 2015 and 2016. The Company’s accounting policies have not changed materially from those included in the Company’s Form S-1 covering the years ended December 31, 2015 and 2016, unless described herein. Use of Estimates These condensed consolidated financial statements have been prepared in conformity with GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements and the reported amount of revenue and expenses during the reporting period. Such management estimates include those relating to assumptions used in contract research accruals, measurement of acquired assets and assumed liabilities in business combinations, allowance for doubtful accounts, inventory reserves, the valuation of derivative liability, income taxes, the estimated useful life and recoverability of long-lived assets, and the valuation of stock-based awards. Actual results could differ from those estimates. Revenue Recognition Product Sales, Chargebacks, Returns, and Discounts The Company recognizes product revenue when there is persuasive evidence of an arrangement, the price is fixed or determinable, collectability is reasonably assured, and upon shipment to or delivery and acceptance by customers. Service revenue is recognized in the period such services have been rendered. The Company’s specialty products sold through its Commercial Platform are distributed through independent pharmaceutical wholesalers. The wholesalers then generally sell to an end user, normally a hospital, alternative healthcare facility, or an independent pharmacy, at a lower price previously established by the end user and the Company. Sales are initially recorded at the list price sold to the wholesaler. Because these prices will be reduced for the end user, the Company records a contra-asset and reduction to revenue at the time of the sale, using the difference between the list price and the estimated end-user contract price. Upon the sale by the wholesaler to the end user, the wholesaler will chargeback the difference between the original list price and price at which the product was sold to the end user and such chargeback is offset against the initial estimated contra asset. The Company reviews the chargebacks to ensure that the initial list-price sales less the estimated chargebacks are accurate. As of June 30, 2017, the Company’s chargeback accrual totaled $1.5 million. The Company offers cash discounts, which approximate 2% of the gross sales price as an incentive for prompt customer payment, and, consistent with industry practice, the Company’s return policy permits customers to return products within a window of time before and after the expiration of product dating, most often 2% of gross purchases. The Company expects that its wholesale customers will make timely payments and take advantage of the cash discounts, and expects customers to use their right of return. Therefore, at the time of sale, net revenue and accounts receivable are reduced by the full amount of the discount offered and the return expected. The Company considers payment performance and historical return rates and adjusts the accrual to reflect actual experience. As of June 30, 2017, the Company’s accrual for cash discounts and return accrual were not material to the financial statements. Concentration of Credit Risk, Other Risks and Uncertainties Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and investments. Cash equivalents are deposited in interest-bearing money market accounts and certificates of deposit. Although the Company deposits the cash with multiple financial institutions, cash balances may occasionally be in excess of the amounts insured by the Federal Deposit Insurance Corporation. The Company also has significant assets and liabilities held in its overseas manufacturing facility in China, Taihao, and therefore is subject to foreign currency fluctuation. Also, due to government restrictions on transferring funds out of China, the total restricted net assets of the Company’s consolidated subsidiaries was $15.3 and $15.7 million as of June 30, 2017 and December 31, 2016, respectively. Recent Accounting Pronouncements Not Yet Adopted In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard will be effective for the Company on January 1, 2018. The standard permits the use of either the retrospective or cumulative effect transition method. The Company’s evaluation of the effects of ASU 2014-09 and the selection of a transition method is ongoing and not yet complete. The Company anticipates that the standard may impact the accounting related to its out-license agreements, however, such agreements are not currently significant to the consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” which requires that lessees distinguish between finance and operating leases and recognize the assets and liabilities that arise from the leases on the balance sheet. This ASU is required to be adopted retrospectively and is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is required to be applied on a modified retrospective basis. The Company is evaluating the effect of this standard on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which modifies the measurement of expected credit losses of certain financial instruments. ASU 2016-13 is required to be adopted retrospectively and is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The Company is evaluating the effect of this standard on its consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” The primary purpose of this ASU is to reduce the diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. This ASU will require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2017. This ASU is required to be applied retrospectively. Early adoption is permitted, including adoption in an interim period. The Company is evaluating the effect of this standard on its consolidated financial statements. Recently Adopted Accounting Pronouncements In July 2015, the FASB issued ASU No. 2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory.” This ASU requires inventory to be measured at the lower of cost or net realizable value. The provisions of this ASU are effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The amendment is required to be applied prospectively. The Company adopted ASU 2015-11 effective January 1, 2017. Adoption of ASU 2015-11 did not have a significant impact on the consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, “Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” which simplifies the accounting for share-based payment award transactions including: income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. Effective January 1, 2017, the Company adopted ASU 2016-09. The standard eliminated the requirement to defer recognition of excess tax benefits related to employee share-based awards until they are realized through a reduction to income taxes payable. The Company applied the modified retrospective method and there was no net cumulative effect adjustment to retained earnings on January 1, 2017 as the increase in deferred income tax assets for previously unrecognized excess tax benefits was fully offset by a valuation allowance. As permitted by the ASU, the Company will continue to use an estimated forfeiture rate in determining stock-based compensation expense. In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which addresses the classification of certain cash transactions on the statement of cash flows. ASU 2016-15 is effective for fiscal years beginning after December 15, 2018, and interim periods within fiscal years beginning after December 15, 2019. The Company early adopted ASU 2016-15 as of January 1, 2016 and applied its provisions retrospectively through the earliest period presented, which did not have a significant impact on its consolidated financial statements. In January 2017, the FASB issued ASU 201704, “Intangibles—Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment.” The primary purpose of the ASU is to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. The ASU also applies the same test of goodwill to all reporting units, now including those with a zero or negative carrying amount of net assets. This ASU is required to be adopted on a prospective basis and is effective for any goodwill impairment tests in fiscal years beginning after December 15, 2019, although early adoption is permitted for any impairment tests performed after January 1, 2017. The Company has adopted the new guidance on a prospective basis during the first quarter of 2017. The adoption of this ASU has not impacted the Company’s consolidated financial statements.

2. Summary of Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted in the United States of America for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, the condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of the Company for the periods presented. These condensed consolidated financial statements reflect the accounts and operations of the Company and those of its subsidiaries in which the Company has a controlling financial interest. Intercompany transactions and balances have been fully eliminated in consolidation.

Results of the operations for the three and six months ended June 30, 2017 are not necessarily indicative of the results expected for the full fiscal year or for any future annual or interim period. These financial statements should be read in conjunction with the consolidated financial statements and related footnotes included in the Company’s Form S-1 covering the years ended December 31, 2015 and 2016.

The Company’s accounting policies have not changed materially from those included in the Company’s Form S-1 covering the years ended December 31, 2015 and 2016, unless described herein.

Use of Estimates

These condensed consolidated financial statements have been prepared in conformity with GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements and the reported amount of revenue and expenses during the reporting period. Such management estimates include those relating to assumptions used in contract research accruals, measurement of acquired assets and assumed liabilities in business combinations, allowance for doubtful accounts, inventory reserves, the valuation of derivative liability, income taxes, the estimated useful life and recoverability of long-lived assets, and the valuation of stock-based awards. Actual results could differ from those estimates.

Revenue Recognition

Product Sales, Chargebacks, Returns, and Discounts

The Company recognizes product revenue when there is persuasive evidence of an arrangement, the price is fixed or determinable, collectability is reasonably assured, and upon shipment to or delivery and acceptance by customers. Service revenue is recognized in the period such services have been rendered.

The Company’s specialty products sold through its Commercial Platform are distributed through independent pharmaceutical wholesalers. The wholesalers then generally sell to an end user, normally a hospital, alternative healthcare facility, or an independent pharmacy, at a lower price previously established by the end user and the Company. Sales are initially recorded at the list price sold to the wholesaler. Because these prices will be reduced for the end user, the Company records a contra-asset and reduction to revenue at the time of the sale, using the difference between the list price and the estimated end-user contract price. Upon the sale by the wholesaler to the end user, the wholesaler will chargeback the difference between the original list price and price at which the product was sold to the end user and such chargeback is offset against the initial estimated contra asset. The Company reviews the chargebacks to ensure that the initial list-price sales less the estimated chargebacks are accurate. As of June 30, 2017, the Company’s chargeback accrual totaled $1.5 million.

The Company offers cash discounts, which approximate 2% of the gross sales price as an incentive for prompt customer payment, and, consistent with industry practice, the Company’s return policy permits customers to return products within a window of time before and after the expiration of product dating, most often 2% of gross purchases. The Company expects that its wholesale customers will make timely payments and take advantage of the cash discounts, and expects customers to use their right of return. Therefore, at the time of sale, net revenue and accounts receivable are reduced by the full amount of the discount offered and the return expected. The Company considers payment performance and historical return rates and adjusts the accrual to reflect actual experience. As of June 30, 2017, the Company’s accrual for cash discounts and return accrual were not material to the financial statements.

Concentration of Credit Risk, Other Risks and Uncertainties

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and investments. Cash equivalents are deposited in interest-bearing money market accounts and certificates of deposit. Although the Company deposits the cash with multiple financial institutions, cash balances may occasionally be in excess of the amounts insured by the Federal Deposit Insurance Corporation. The Company also has significant assets and liabilities held in its overseas manufacturing facility in China, Taihao, and therefore is subject to foreign currency fluctuation. Also, due to government restrictions on transferring funds out of China, the total restricted net assets of the Company’s consolidated subsidiaries was $15.3 and $15.7 million as of June 30, 2017 and December 31, 2016, respectively.

Recent Accounting Pronouncements Not Yet Adopted

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard will be effective for the Company on January 1, 2018. The standard permits the use of either the retrospective or cumulative effect transition method. The Company’s evaluation of the effects of ASU 2014-09 and the selection of a transition method is ongoing and not yet complete. The Company anticipates that the standard may impact the accounting related to its out-license agreements, however, such agreements are not currently significant to the consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” which requires that lessees distinguish between finance and operating leases and recognize the assets and liabilities that arise from the leases on the balance sheet. This ASU is required to be adopted retrospectively and is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is required to be applied on a modified retrospective basis. The Company is evaluating the effect of this standard on its consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which modifies the measurement of expected credit losses of certain financial instruments. ASU 2016-13 is required to be adopted retrospectively and is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The Company is evaluating the effect of this standard on its consolidated financial statements.

In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” The primary purpose of this ASU is to reduce the diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. This ASU will require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2017. This ASU is required to be applied retrospectively. Early adoption is permitted, including adoption in an interim period. The Company is evaluating the effect of this standard on its consolidated financial statements.

Recently Adopted Accounting Pronouncements

In July 2015, the FASB issued ASU No. 2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory.” This ASU requires inventory to be measured at the lower of cost or net realizable value. The provisions of this ASU are effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The amendment is required to be applied prospectively. The Company adopted ASU 2015-11 effective January 1, 2017. Adoption of ASU 2015-11 did not have a significant impact on the consolidated financial statements.

In March 2016, the FASB issued ASU No. 2016-09, “Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” which simplifies the accounting for share-based payment award transactions including: income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. Effective January 1, 2017, the Company adopted ASU 2016-09. The standard eliminated the requirement to defer recognition of excess tax benefits related to employee share-based awards until they are realized through a reduction to income taxes payable. The Company applied the modified retrospective method and there was no net cumulative effect adjustment to retained earnings on January 1, 2017 as the increase in deferred income tax assets for previously unrecognized excess tax benefits was fully offset by a valuation allowance. As permitted by the ASU, the Company will continue to use an estimated forfeiture rate in determining stock-based compensation expense.

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which addresses the classification of certain cash transactions on the statement of cash flows. ASU 2016-15 is effective for fiscal years beginning after December 15, 2018, and interim periods within fiscal years beginning after December 15, 2019. The Company early adopted ASU 2016-15 as of January 1, 2016 and applied its provisions retrospectively through the earliest period presented, which did not have a significant impact on its consolidated financial statements.

In January 2017, the FASB issued ASU 201704, “Intangibles—Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment.” The primary purpose of the ASU is to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. The ASU also applies the same test of goodwill to all reporting units, now including those with a zero or negative carrying amount of net assets. This ASU is required to be adopted on a prospective basis and is effective for any goodwill impairment tests in fiscal years beginning after December 15, 2019, although early adoption is permitted for any impairment tests performed after January 1, 2017. The Company has adopted the new guidance on a prospective basis during the first quarter of 2017. The adoption of this ASU has not impacted the Company’s consolidated financial statements.