Recent Accounting Pronouncements	9 Months Ended
Sep. 30, 2017
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	3. Recent Accounting Pronouncements In May 2017, the Financial Accounting Standards Board (the "FASB"), issued Accounting Standards Update ASU No. 2017-09, Compensation – Stock Compensation (Topic 718) – Scope of Modification Accounting, or ASU 2017-09, which clarifies that a change to the terms or conditions of a share-based payment award should be accounted for as a modification only if the fair value, vesting conditions or classification (as equity or liability) of the award changes as a result of the change in terms or conditions. Modification of a share-based payment award may result in the Company recognizing additional compensation expense. ASU 2017-09 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. The Company generally has not modified, and does not expect to frequently modify, the fair value, vesting conditions or classification of its share-based payment awards. As a result, for reporting periods following the adoption of ASU 2017-09, the Company generally does not expect this guidance to have a material effect on its financial position, results of operations or cash flows. However, if and when modifications occur, their effect could be material to the Company's financial position, results of operations or cash flows (see Note 8, Stock Based Compensation). In January 2017, the FASB issued updated guidance to clarify the definition of a business within the context of business combinations. The updated guidance requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This updated guidance is expected to reduce the number of transactions that need to be further evaluated as business combinations. If further evaluation is necessary, the updated guidance will require that a business set include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output. The updated guidance will remove the evaluation of whether a market participant could replace missing elements. The new guidance is effective for annual and interim periods beginning after December 15, 2017 and is to be applied on a prospective basis. The adoption of this Standard will not have a material impact to the Company's financial position or its results of operations. In January 2017, the FASB issued updated guidance which eliminated Step 2 from the goodwill impairment test. Step 2 is the process of measuring a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. The new guidance requires entities to measure a goodwill impairment loss as the amount by which a reporting unit's carrying value exceeds its fair value, limited to the carrying amount of goodwill. The FASB also eliminated the requirements for entities that have reporting units with zero or negative carrying amounts to perform a qualitative assessment for the goodwill impairment test. Instead, those entities would be required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount. The new guidance is effective for interim or annual goodwill impairment tests performed in fiscal years beginning after December 15, 2019, with early adoption permitted. We do not expect adoption of this guidance to be material. In March 2016, the FASB issued Accounting Standards Update 2016-09, Compensation—Stock Compensation ("ASU 2016-09"). ASU 2016-09 includes several areas of simplification to stock compensation including simplifications to the accounting for income taxes, classification of excess tax benefits on the Statement of Cash Flows and forfeitures. ASU 2016-09 is effective for annual reporting periods beginning after December 15, 2016. We adopted this Standard on January 1, 2017. The adoption of this Standard did not have a material impact to the Company's financial position or its results of operations. In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases ("ASU 2016-02"). ASU 2016-02 allows the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The classification criteria for distinguishing between finance leases and operating leases are substantially similar to the classification criteria for distinguishing between capital leases and operating leases in the previous leases guidance. The Update 2016-02 is effective for annual reporting periods beginning after December 15, 2018 and early adoption is permitted. We are still evaluating the effect of this update. In January 2016, the FASB issued Accounting Standards Update 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). ASU 2016-01 eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The standard also clarifies the need to evaluate a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with our other deferred tax assets. The update 2016-01 is effective for annual reporting periods beginning after December 15, 2017. The adoption of this standard is not expected to have a material impact on our financial statements. In May 2014, the FASB issued Accounting Standards Update No. 2014-09 (Topic 606) "Revenue from Contracts with Customers." Topic 606 supersedes the revenue recognition requirements in Accounting Standards Codification Topic 605, "Revenue Recognition", and requires entities to recognize revenue when they transfer control of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. We are currently assessing the method of adoption and the impact this new guidance will have on our financial statements. We expect to adopt these standards using the modified retrospective method. The timing of revenue recognition for variable consideration under our licensing and collaboration agreements may be different as a result of this new guidance. We are reviewing our licensing agreement for variable consideration, and if any such consideration exists, whether it should be estimated and recognized earlier than under the current revenue guidance.

3. Recent Accounting Pronouncements

In May 2017, the Financial Accounting Standards Board (the "FASB"), issued Accounting Standards Update ASU No. 2017-09, Compensation – Stock Compensation (Topic 718) – Scope of Modification Accounting, or ASU 2017-09, which clarifies that a change to the terms or conditions of a share-based payment award should be accounted for as a modification only if the fair value, vesting conditions or classification (as equity or liability) of the award changes as a result of the change in terms or conditions. Modification of a share-based payment award may result in the Company recognizing additional compensation expense. ASU 2017-09 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. The Company generally has not modified, and does not expect to frequently modify, the fair value, vesting conditions or classification of its share-based payment awards. As a result, for reporting periods following the adoption of ASU 2017-09, the Company generally does not expect this guidance to have a material effect on its financial position, results of operations or cash flows. However, if and when modifications occur, their effect could be material to the Company's financial position, results of operations or cash flows (see Note 8, Stock Based Compensation).

In January 2017, the FASB issued updated guidance to clarify the definition of a business within the context of business combinations. The updated guidance requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This updated guidance is expected to reduce the number of transactions that need to be further evaluated as business combinations. If further evaluation is necessary, the updated guidance will require that a business set include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output. The updated guidance will remove the evaluation of whether a market participant could replace missing elements. The new guidance is effective for annual and interim periods beginning after December 15, 2017 and is to be applied on a prospective basis. The adoption of this Standard will not have a material impact to the Company's financial position or its results of operations.

In January 2017, the FASB issued updated guidance which eliminated Step 2 from the goodwill impairment test. Step 2 is the process of measuring a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. The new guidance requires entities to measure a goodwill impairment loss as the amount by which a reporting unit's carrying value exceeds its fair value, limited to the carrying amount of goodwill. The FASB also eliminated the requirements for entities that have reporting units with zero or negative carrying amounts to perform a qualitative assessment for the goodwill impairment test. Instead, those entities would be required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount. The new guidance is effective for interim or annual goodwill impairment tests performed in fiscal years beginning after December 15, 2019, with early adoption permitted. We do not expect adoption of this guidance to be material.

In March 2016, the FASB issued Accounting Standards Update 2016-09, Compensation—Stock Compensation ("ASU 2016-09"). ASU 2016-09 includes several areas of simplification to stock compensation including simplifications to the accounting for income taxes, classification of excess tax benefits on the Statement of Cash Flows and forfeitures. ASU 2016-09 is effective for annual reporting periods beginning after December 15, 2016. We adopted this Standard on January 1, 2017. The adoption of this Standard did not have a material impact to the Company's financial position or its results of operations.

In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases ("ASU 2016-02"). ASU 2016-02 allows the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The classification criteria for distinguishing between finance leases and operating leases are substantially similar to the classification criteria for distinguishing between capital leases and operating leases in the previous leases guidance. The Update 2016-02 is effective for annual reporting periods beginning after December 15, 2018 and early adoption is permitted. We are still evaluating the effect of this update.

In January 2016, the FASB issued Accounting Standards Update 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). ASU 2016-01 eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The standard also clarifies the need to evaluate a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with our other deferred tax assets. The update 2016-01 is effective for annual reporting periods beginning after December 15, 2017. The adoption of this standard is not expected to have a material impact on our financial statements.

In May 2014, the FASB issued Accounting Standards Update No. 2014-09 (Topic 606) "Revenue from Contracts with Customers." Topic 606 supersedes the revenue recognition requirements in Accounting Standards Codification Topic 605, "Revenue Recognition", and requires entities to recognize revenue when they transfer control of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. We are currently assessing the method of adoption and the impact this new guidance will have on our financial statements. We expect to adopt these standards using the modified retrospective method. The timing of revenue recognition for variable consideration under our licensing and collaboration agreements may be different as a result of this new guidance. We are reviewing our licensing agreement for variable consideration, and if any such consideration exists, whether it should be estimated and recognized earlier than under the current revenue guidance.