Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Accounts Receivable Accounts receivable arising from product sales represent amounts due from physicians. We provide reserves against trade receivables for estimated losses that may result from a customer’s inability to pay. Amounts determined to be uncollectible are charged or written-off against a reserve. Accounts receivable, net of allowance for doubtful accounts of $2 thousand and $12 thousand as of March 31, 2016 and December 31, 2015, respectively, were zero at the end of both periods. Stock-Based Compensation The Company follows Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 718, Compensation – Stock Compensation (ASC 718), or ASC 505-50, Equity – Equity Based Payments to Non-Employees, where applicable. The Company accounts for stock-based awards to employees using the fair value based method to determine compensation for all arrangements where shares of stock or equity instruments are issued for compensation. In addition, the Company accounts for stock-based compensation to non-employees in accordance with the accounting guidance for equity instruments that are issued to entities or persons other than employees. The Company uses a Black-Scholes option-pricing model to determine the fair value of each option grant as of the date of grant for expense incurred. The Black- Scholes model requires inputs for risk-free interest rate, dividend yield, expected stock price volatility and expected term of the options. The value of the award that is ultimately expected to vest based on the achievement of a performance condition (i.e., service period) is recognized as expense on a straight-line basis over the requisite service period. See Note 7 for additional details. Previously, ASC 718 required forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differed from those estimates. During the three months ended March 31, 2016, the Company adopted FASB Accounting Standards Update (ASU) 2016-09 which allows an entity to elect as an accounting policy either to continue to estimate the total number of awards for which the requisite service period will not be rendered or to account for forfeitures when they occur. In connection with the adoption of this ASU, the Company made an accounting policy election to account for forfeitures as they occur. See “Recently Adopted Accounting Pronouncements” below for additional details. Income Taxes In accordance with ASC 270, Interim Reporting, and ASC 740, Income Taxes, the Company is required at the end of each interim period to determine the best estimate of its annual effective tax rate and then apply that rate in providing for income taxes on a current year-to-date (interim period) basis. For the three months ended March 31, 2016 and 2015, the Company recorded no tax expense or benefit due to the expected current year loss and its historical losses. The Company had not recorded its net deferred tax asset as of either March 31, 2016 or December 31, 2015 because it maintained a full valuation allowance against all deferred tax assets as management has determined that it is not more likely than not that the Company will realize these future tax benefits. As of March 31, 2016 and December 31, 2015, the Company had no uncertain tax positions. Recently Issued Accounting Pronouncements Amendments to ASC Topic 606, Revenue from Contracts with Customers (ASC 606) In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). In April 2016, the FASB also issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing. These amendments include targeted improvements based on input the FASB received from the FASB/International Accounting Standards Boards’ Joint Transition Resource Group for Revenue Recognition and other stakeholders, but do not change the core principles in Topic 606. The ASUs seek to clarify the guidance within the applicable subtopics of ASC 606, including amendments to the implementation guidance and illustrations intended to improve the operability and understandability of the implementation guidance. The amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. Management is currently evaluating the effect that the updated standard will have on the Company’s consolidated financial statements. Recently Adopted Accounting Pronouncements Amendments to ASC 718, Compensation – Stock Compensation In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This update simplifies several aspects of accounting for share-based payment award transactions and includes accounting for income taxes, forfeitures, statutory tax withholding requirements and the classification of awards as either equity or liabilities, as well as the classification on the statement of cash flows. The guidance is effective for public companies with annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is permitted. The Company elected to early adopt ASU 2016-09 during the three months ended March 31, 2016. In connection with the adoption of this ASU, the Company elected to account for forfeitures as they occur and applied this change in accounting policy on a modified retrospective basis. As a result, the Company recorded a cumulative-effect adjustment to retained earnings which resulted in an increase to accumulated deficit of $0.1 million with an offsetting increase to additional paid-in capital (zero net total equity impact) as of the date of adoption, principally related to additional stock compensation expense that would have been recognized on unvested outstanding options unadjusted for estimated forfeitures. Other provisions of ASU 2016-09 had no impact on the Company’s Condensed Consolidated Financial Statements during the current period or previously reported periods but may in the future. Other Recently Issued Guidance Management does not believe that any other recently issued accounting pronouncements issued by the FASB or guidance issued by the SEC did or is expected to have a material impact on the Company’s present or future consolidated financial statements.

Summary of Significant Accounting Policies

Accounts Receivable

Accounts receivable arising from product sales represent amounts due from physicians. We provide reserves against trade receivables for estimated losses that may result from a customer’s inability to pay. Amounts determined to be uncollectible are charged or written-off against a reserve. Accounts receivable, net of allowance for doubtful accounts of $2 thousand and $12 thousand as of March 31, 2016 and December 31, 2015, respectively, were zero at the end of both periods.

Stock-Based Compensation

The Company follows Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 718, Compensation – Stock Compensation (ASC 718), or ASC 505-50, Equity – Equity Based Payments to Non-Employees, where applicable. The Company accounts for stock-based awards to employees using the fair value based method to determine compensation for all arrangements where shares of stock or equity instruments are issued for compensation. In addition, the Company accounts for stock-based compensation to non-employees in accordance with the accounting guidance for equity instruments that are issued to entities or persons other than employees. The Company uses a Black-Scholes option-pricing model to determine the fair value of each option grant as of the date of grant for expense incurred. The Black- Scholes model requires inputs for risk-free interest rate, dividend yield, expected stock price volatility and expected term of the options. The value of the award that is ultimately expected to vest based on the achievement of a performance condition (i.e., service period) is recognized as expense on a straight-line basis over the requisite service period. See Note 7 for additional details.

Previously, ASC 718 required forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differed from those estimates. During the three months ended March 31, 2016, the Company adopted FASB Accounting Standards Update (ASU) 2016-09 which allows an entity to elect as an accounting policy either to continue to estimate the total number of awards for which the requisite service period will not be rendered or to account for forfeitures when they occur. In connection with the adoption of this ASU, the Company made an accounting policy election to account for forfeitures as they occur. See “Recently Adopted Accounting Pronouncements” below for additional details.

Income Taxes

In accordance with ASC 270, Interim Reporting, and ASC 740, Income Taxes, the Company is required at the end of each interim period to determine the best estimate of its annual effective tax rate and then apply that rate in providing for income taxes on a current year-to-date (interim period) basis. For the three months ended March 31, 2016 and 2015, the Company recorded no tax expense or benefit due to the expected current year loss and its historical losses. The Company had not recorded its net deferred tax asset as of either March 31, 2016 or December 31, 2015 because it maintained a full valuation allowance against all deferred tax assets as management has determined that it is not more likely than not that the Company will realize these future tax benefits. As of March 31, 2016 and December 31, 2015, the Company had no uncertain tax positions.

Recently Issued Accounting Pronouncements

Amendments to ASC Topic 606, Revenue from Contracts with Customers (ASC 606)

In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). In April 2016, the FASB also issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing. These amendments include targeted improvements based on input the FASB received from the FASB/International Accounting Standards Boards’ Joint Transition Resource Group for Revenue Recognition and other stakeholders, but do not change the core principles in Topic 606. The ASUs seek to clarify the guidance within the applicable subtopics of ASC 606, including amendments to the implementation guidance and illustrations intended to improve the operability and understandability of the implementation guidance. The amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. Management is currently evaluating the effect that the updated standard will have on the Company’s consolidated financial statements.

Recently Adopted Accounting Pronouncements

Amendments to ASC 718, Compensation – Stock Compensation

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This update simplifies several aspects of accounting for share-based payment award transactions and includes accounting for income taxes, forfeitures, statutory tax withholding requirements and the classification of awards as either equity or liabilities, as well as the classification on the statement of cash flows. The guidance is effective for public companies with annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is permitted. The Company elected to early adopt ASU 2016-09 during the three months ended March 31, 2016. In connection with the adoption of this ASU, the Company elected to account for forfeitures as they occur and applied this change in accounting policy on a modified retrospective basis. As a result, the Company recorded a cumulative-effect adjustment to retained earnings which resulted in an increase to accumulated deficit of $0.1 million with an offsetting increase to additional paid-in capital (zero net total equity impact) as of the date of adoption, principally related to additional stock compensation expense that would have been recognized on unvested outstanding options unadjusted for estimated forfeitures. Other provisions of ASU 2016-09 had no impact on the Company’s Condensed Consolidated Financial Statements during the current period or previously reported periods but may in the future.

Other Recently Issued Guidance

Management does not believe that any other recently issued accounting pronouncements issued by the FASB or guidance issued by the SEC did or is expected to have a material impact on the Company’s present or future consolidated financial statements.