Significant Accounting Policies	9 Months Ended
Sep. 30, 2019
Significant Accounting Policies
Significant Accounting Policies	2.Significant Accounting Policies Recent Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016‑02, Leases. The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability initially measured at the present value of the lease payments on the balance sheet for all leases with terms longer than 12 months. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. In 2018, the FASB issued ASU 2018‑01 and ASU 2018‑11, which collectively adds two practical expedients and provides a second modified retrospective transition method in the year of adoption. Management adopted the new standard on January 1, 2019 using the modified retrospective transition approach with no restatement of prior periods or cumulative adjustment to accumulated deficit. We elected the “package of practiced expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and indirect costs. We also elected the short-term lease exemption and therefore do not recognize ROU assets or corresponding liabilities for lease agreements with an original term of 12 months or less. Consequently, prior year financials statements have not been updated and the disclosures required under the new standard have not been provided for periods prior to the adoption date. Upon adoption of the new standards, the Company recognized $0.1 million for ROU assets and corresponding lease liabilities on the consolidated balance sheet related to leases for office and lab space. The adoption of these ASU’s on January 1, 2019 did not have a significant impact on our consolidated financial statements. In August 2018, the FASB issued ASU No. 2018‑13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The new standard eliminates certain disclosure requirements for fair value measurements for all entities, requires public entities to disclose certain new information and modifies some disclosure requirements. This standard is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. Management is currently evaluating the impact of future adoption of the new standard on the Company’s consolidated financial statements. In November 2018, the FASB issued ASU No. 2018‑18, Collaborative Arrangements (Topic 808): Clarifying the Interaction Between Topic 808 and Topic 606. The new standard provides guidance on how to assess whether certain transactions between collaborative arrangement participants should be accounted for within the revenue recognition standard. The update also provides more comparability in the presentation of revenue for certain transactions between collaborative arrangement participants. The new standard is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted. The Company early adopted this standard effective December 31, 2018 and notes that it did not a significant impact on our consolidated financial statements as the Company currently does not have significant collaborative agreements in place. Management has reviewed all other recently issued pronouncements and has determined they will have no material impact on the Company’s consolidated financial statements. Correction of Immaterial Errors in Previously Issued Financial Statements In evaluating the consolidated financial statements as of and for the years ended December 31, 2018, the Company subsequently identified immaterial errors within the Company’s consolidated balance sheets as of December 31, 2018 and consolidated statements of cash flows for the year ended December 31, 2018. Reclassified amounts were determined to be immaterial and did not have an impact on cash flows from operating activities or the Company’s results of operations for the year ended December 31, 2018.

2.Significant Accounting Policies

Recent Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016‑02, Leases. The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability initially measured at the present value of the lease payments on the balance sheet for all leases with terms longer than 12 months. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. In 2018, the FASB issued ASU 2018‑01 and ASU 2018‑11, which collectively adds two practical expedients and provides a second modified retrospective transition method in the year of adoption. Management adopted the new standard on January 1, 2019 using the modified retrospective transition approach with no restatement of prior periods or cumulative adjustment to accumulated deficit. We elected the “package of practiced expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and indirect costs. We also elected the short-term lease exemption and therefore do not recognize ROU assets or corresponding liabilities for lease agreements with an original term of 12 months or less. Consequently, prior year financials statements have not been updated and the disclosures required under the new standard have not been provided for periods prior to the adoption date. Upon adoption of the new standards, the Company recognized $0.1 million for ROU assets and corresponding lease liabilities on the consolidated balance sheet related to leases for office and lab space. The adoption of these ASU’s on January 1, 2019 did not have a significant impact on our consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018‑13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The new standard eliminates certain disclosure requirements for fair value measurements for all entities, requires public entities to disclose certain new information and modifies some disclosure requirements. This standard is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. Management is currently evaluating the impact of future adoption of the new standard on the Company’s consolidated financial statements.

In November 2018, the FASB issued ASU No. 2018‑18, Collaborative Arrangements (Topic 808): Clarifying the Interaction Between Topic 808 and Topic 606. The new standard provides guidance on how to assess whether certain transactions between collaborative arrangement participants should be accounted for within the revenue recognition standard. The update also provides more comparability in the presentation of revenue for certain transactions between collaborative arrangement participants. The new standard is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted. The Company early adopted this standard effective December 31, 2018 and notes that it did not a significant impact on our consolidated financial statements as the Company currently does not have significant collaborative agreements in place.

Management has reviewed all other recently issued pronouncements and has determined they will have no material impact on the Company’s consolidated financial statements.

Correction of Immaterial Errors in Previously Issued Financial Statements

In evaluating the consolidated financial statements as of and for the years ended December 31, 2018, the Company subsequently identified immaterial errors within the Company’s consolidated balance sheets as of December 31, 2018 and consolidated statements of cash flows for the year ended December 31, 2018. Reclassified amounts were determined to be immaterial and did not have an impact on cash flows from operating activities or the Company’s results of operations for the year ended December 31, 2018.