Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2018
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Collegium Pharmaceutical, Inc. (a Virginia corporation) as well as the accounts of Collegium Securities Corp. (a Massachusetts corporation), incorporated in December 2015, and Collegium NF, LLC (a Delaware limited liability company), organized in December 2017, both wholly owned subsidiaries requiring consolidation. The financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting and as required by Regulation S-X, Rule 10-01. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of the Company’s management, the accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments (consisting of items of a normal and recurring nature) necessary to fairly present the financial position of the Company as of March 31, 2018, the results of operations for three months ended March 31, 2018 and 2017, and cash flows for the three months ended March 31, 2018 and 2017. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results to be expected for the full year. When preparing financial statements in conformity with GAAP, the Company must make estimates and assumptions that impact the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in the Company’s financial statements and accompanying notes. The most significant estimates in the Company’s financial statements relate to revenue recognition, including the estimates of product returns, units prescribed, discounts and allowances related to commercial sales of its products, estimates utilized in the valuation of inventory, estimates of useful lives with respect to intangible assets, accounting for stock-based compensation, contingencies, intangible assets, and tax valuation reserves. The Company bases estimates and assumptions on historical experience when available and on various factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis. The Company’s actual results may differ from these estimates under different assumptions or conditions. The consolidated interim financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 (the “Annual Report”). Significant Accounting Policies The Company’s significant accounting policies are described in Note 2, “Summary of Significant Accounting Policies,” in the Company’s Annual Report. There have been no material changes in the Company’s significant accounting policies, other than the adoption of accounting pronouncements below, as compared to the significant accounting policies described in the Annual Report. Controlled Equity Offering Sales Agreement In March 2017, the Company entered into a Controlled Equity Offering Sales Agreement (the “ATM Sales Agreement”), with Cantor Fitzgerald & Co., as sales agent (“Cantor Fitzgerald”), pursuant to which the Company may issue and sell, from time to time, through Cantor Fitzgerald, shares of the Company’s common stock, up to an aggregate offering price of $60,000 (the “ATM Shares”). Under the ATM Sales Agreement, Cantor Fitzgerald may sell the ATM Shares by methods deemed to be an “at-the-market” offering as defined in Rule 415 promulgated under the Securities Act of 1933, as amended (the “Securities Act”), including sales made directly on The NASDAQ Global Select Market, on any other existing trading market for the ATM Shares or to or through a market maker. In addition, under the ATM Sales Agreement, Cantor Fitzgerald may sell the ATM Shares by any other method permitted by law, including in privately negotiated transactions. The Company is not obligated to make any sales of the ATM Shares under the ATM Sales Agreement. The Company or Cantor Fitzgerald may suspend or terminate the offering of ATM Shares upon notice to the other party and subject to other conditions. The Company will pay Cantor Fitzgerald a commission of up to 3.0% of the gross proceeds from the sale of the ATM Shares pursuant to the ATM Sales Agreement and has agreed to provide Cantor Fitzgerald with customary indemnification and contribution rights. As of March 31, 2018, the Company had sold an aggregate of 3,126,998 shares at an average gross sales price of $11.36 per share generating net proceeds of $34,283, after deduction of underwriting discounts and commissions and expenses payable by the Company. All shares sold pursuant to the ATM Sales agreement were sold during the year ended December 31, 2017. The Company did not sell any shares pursuant to the ATM sales agreement during the three months ended March 31, 2018. Advertising and Product Promotion Costs Advertising and product promotion costs are included in selling, general and administrative expenses and were $2,562 and $3,860 in the three months ended March 31, 2018 and 2017 respectively. Advertising and product promotion costs are expensed as incurred. Restricted Cash Restricted cash represents cash held in a depository account at a financial institution to collateralize a conditional stand‑by letter of credit related to the Company’s facility lease agreements. Restricted cash is reported as non‑current unless the restrictions are expected to be released in the next twelve months. Leases Effective March 2018, the Company entered into a lease for its new corporate headquarters (the “Lease”) pursuant to which the Company will lease approximately 50,678 of rentable square feet of space, in Stoughton, Massachusetts. The Lease will commence when the tenant improvements in the space are substantially complete and will continue thereafter for a term of ten years. The Company has the right to extend the term of the Lease for two additional five-year terms, provided that written notice is provided to the Landlord no later than twelve months prior to the expiration of the current Lease term. The initial annual base rent is $1,214, or $23.95 per rentable square foot, and will increase annually by 2.5% to 3.1% over the subsequent Lease years. The Company is still evaluating when it plans to take possession of the new space and when the Lease term will commence. Income Taxes For the three months ended March 31, 2018 and 2017, the Company did not record a current or deferred income tax expense or (benefit) due to current and historical losses incurred by the Company. The Company's losses before income taxes consist solely of losses from domestic operations. As of March 31, 2018, the Company has recorded a full valuation allowance for deferred tax assets including NOL and tax credit carryovers. The Tax Cuts and Jobs Act of 2017 (“TCJA” or “2017 Tax Act”), which was signed into law in December 2017, has resulted in significant changes to the U.S. corporate income tax system. The SEC staff issued Staff Accounting Bulletin (SAB) 118, which provides guidance on accounting for enactment effects of the TCJA. The Company has not finalized its review of the impact of TCJA on the NOL rules, and the impact, if any, to the Company’s ability to utilize and carryover net operating losses. For additional information related to the TCJA, please read Note 13, Income Taxes, to our consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017. Recently Adopted Accounting Pronouncements New accounting pronouncements are issued periodically by the Financial Accounting Standards Board (“FASB”) and are adopted by the Company as of the specified effective dates. In May 2014, the FASB issued Accounting Standards Update, or ASU, 2014-09, Revenue from Contracts with Customers (Topic 606), which amends the guidance for accounting for revenue from contracts with customers. This ASU supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and creates a new Topic 606, Revenue from Contracts with Customers. In 2015, 2016 and 2017, the FASB issued additional ASUs related to Topic 606, including ASUs 2015-14, 2016-08, 2016-10, 2016-12, 2016-20, 2017-13, 2017-14, that delayed the effective date of and clarified various aspects of the new guidance, including principal versus agent considerations, identifying performance obligations, and licensing. The Company adopted ASC Topic 606, Revenue from Contracts with Customers, on January 1, 2018 using the modified retrospective method for all contracts not completed as of the date of adoption. The adoption of ASU 2014-09 did not have an impact on the Company’s consolidated financial position, results of operations, equity or cash flows as of the adoption date or for the three months ended March 31, 2018. Refer to Note 3 "Revenue from Contracts with Customers" for the required disclosures and a discussion of the Company's policies related to revenue recognition. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, and in November 2016, the FASB issued ASU 2016-18, Restricted Cash. The purpose of ASU 2016-15 is to reduce the diversity in presentation and classification of the following items within the Statement of Cash Flows: debt prepayments, settlement of zero coupon debt instruments, contingent consideration payments, insurance proceeds, securitization transactions and distributions from equity method investees. The update also addresses classification of transactions that have characteristics of more than one class of cash flows. ASU 2016-18 requires the Statement of Cash Flows to explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted 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. The Company adopted these new standards on January 1, 2018 using the retrospective transition method as required with respect to each period presented. The adoption of these standards did not have an impact on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 most significantly impacts lessee accounting and disclosures. First, this guidance requires lessees to identify arrangements that should be accounted for as leases. Under ASU 2016-02, for lease arrangements exceeding a 12-month term, a right-of-use asset and lease obligation is recorded by the lessee for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. The Balance Sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. Leases with a term of 12 months or less will be accounted for in a manner similar to existing guidance for operating leases. In addition, ASU 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. This guidance is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted for all entities. The Company has not chosen early adoption for this ASU and is currently evaluating its effect on the Company’s consolidated financial statements. Based on its preliminary assessment, the Company expects to recognize a right-to-use asset and corresponding lease liability on its Balance Sheet related to lease agreement for its corporate headquarters upon adoption of this ASU.

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Collegium Pharmaceutical, Inc. (a Virginia corporation) as well as the accounts of Collegium Securities Corp. (a Massachusetts corporation), incorporated in December 2015, and Collegium NF, LLC (a Delaware limited liability company), organized in December 2017, both wholly owned subsidiaries requiring consolidation. The financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting and as required by Regulation S-X, Rule 10-01. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements.

In the opinion of the Company’s management, the accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments (consisting of items of a normal and recurring nature) necessary to fairly present the financial position of the Company as of March 31, 2018, the results of operations for three months ended March 31, 2018 and 2017, and cash flows for the three months ended March 31, 2018 and 2017. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results to be expected for the full year.

When preparing financial statements in conformity with GAAP, the Company must make estimates and assumptions that impact the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in the Company’s financial statements and accompanying notes. The most significant estimates in the Company’s financial statements relate to revenue recognition, including the estimates of product returns, units prescribed, discounts and allowances related to commercial sales of its products, estimates utilized in the valuation of inventory, estimates of useful lives with respect to intangible assets, accounting for stock-based compensation, contingencies, intangible assets, and tax valuation reserves. The Company bases estimates and assumptions on historical experience when available and on various factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis. The Company’s actual results may differ from these estimates under different assumptions or conditions. The consolidated interim financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 (the “Annual Report”).

Significant Accounting Policies

The Company’s significant accounting policies are described in Note 2, “Summary of Significant Accounting Policies,” in the Company’s Annual Report. There have been no material changes in the Company’s significant accounting policies, other than the adoption of accounting pronouncements below, as compared to the significant accounting policies described in the Annual Report.

Controlled Equity Offering Sales Agreement

In March 2017, the Company entered into a Controlled Equity Offering Sales Agreement (the “ATM Sales Agreement”), with Cantor Fitzgerald & Co., as sales agent (“Cantor Fitzgerald”), pursuant to which the Company may issue and sell, from time to time, through Cantor Fitzgerald, shares of the Company’s common stock, up to an aggregate offering price of $60,000 (the “ATM Shares”).

Under the ATM Sales Agreement, Cantor Fitzgerald may sell the ATM Shares by methods deemed to be an “at-the-market” offering as defined in Rule 415 promulgated under the Securities Act of 1933, as amended (the “Securities Act”), including sales made directly on The NASDAQ Global Select Market, on any other existing trading market for the ATM Shares or to or through a market maker. In addition, under the ATM Sales Agreement, Cantor Fitzgerald may sell the ATM Shares by any other method permitted by law, including in privately negotiated transactions.

The Company is not obligated to make any sales of the ATM Shares under the ATM Sales Agreement. The Company or Cantor Fitzgerald may suspend or terminate the offering of ATM Shares upon notice to the other party and subject to other conditions. The Company will pay Cantor Fitzgerald a commission of up to 3.0% of the gross proceeds from the sale of the ATM Shares pursuant to the ATM Sales Agreement and has agreed to provide Cantor Fitzgerald with customary indemnification and contribution rights.

As of March 31, 2018, the Company had sold an aggregate of 3,126,998 shares at an average gross sales price of $11.36 per share generating net proceeds of $34,283, after deduction of underwriting discounts and commissions and expenses payable by the Company. All shares sold pursuant to the ATM Sales agreement were sold during the year ended December 31, 2017. The Company did not sell any shares pursuant to the ATM sales agreement during the three months ended March 31, 2018.

Advertising and Product Promotion Costs

Advertising and product promotion costs are included in selling, general and administrative expenses and were $2,562 and $3,860 in the three months ended March 31, 2018 and 2017 respectively. Advertising and product promotion costs are expensed as incurred.

Restricted Cash

Restricted cash represents cash held in a depository account at a financial institution to collateralize a conditional stand‑by letter of credit related to the Company’s facility lease agreements. Restricted cash is reported as non‑current unless the restrictions are expected to be released in the next twelve months.

Leases

Effective March 2018, the Company entered into a lease for its new corporate headquarters (the “Lease”) pursuant to which the Company will lease approximately 50,678 of rentable square feet of space, in Stoughton, Massachusetts. The Lease will commence when the tenant improvements in the space are substantially complete and will continue thereafter for a term of ten years. The Company has the right to extend the term of the Lease for two additional five-year terms, provided that written notice is provided to the Landlord no later than twelve months prior to the expiration of the current Lease term. The initial annual base rent is $1,214, or $23.95 per rentable square foot, and will increase annually by 2.5% to 3.1% over the subsequent Lease years. The Company is still evaluating when it plans to take possession of the new space and when the Lease term will commence.

Income Taxes

For the three months ended March 31, 2018 and 2017, the Company did not record a current or deferred income tax expense or (benefit) due to current and historical losses incurred by the Company. The Company's losses before income taxes consist solely of losses from domestic operations. As of March 31, 2018, the Company has recorded a full valuation allowance for deferred tax assets including NOL and tax credit carryovers. The Tax Cuts and Jobs Act of 2017 (“TCJA” or “2017 Tax Act”), which was signed into law in December 2017, has resulted in significant changes to the U.S. corporate income tax system. The SEC staff issued Staff Accounting Bulletin (SAB) 118, which provides guidance on accounting for enactment effects of the TCJA. The Company has not finalized its review of the impact of TCJA on the NOL rules, and the impact, if any, to the Company’s ability to utilize and carryover net operating losses. For additional information related to the TCJA, please read Note 13, Income Taxes, to our consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017.

Recently Adopted Accounting Pronouncements

New accounting pronouncements are issued periodically by the Financial Accounting Standards Board (“FASB”) and are adopted by the Company as of the specified effective dates.

In May 2014, the FASB issued Accounting Standards Update, or ASU, 2014-09, Revenue from Contracts with Customers (Topic 606), which amends the guidance for accounting for revenue from contracts with customers. This ASU supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and creates a new Topic 606, Revenue from Contracts with Customers. In 2015, 2016 and 2017, the FASB issued additional ASUs related to Topic 606, including ASUs 2015-14, 2016-08, 2016-10, 2016-12, 2016-20, 2017-13, 2017-14, that delayed the effective date of and clarified various aspects of the new guidance, including principal versus agent considerations, identifying performance obligations, and licensing. The Company adopted ASC Topic 606, Revenue from Contracts with Customers, on January 1, 2018 using the modified retrospective method for all contracts not completed as of the date of adoption. The adoption of ASU 2014-09 did not have an impact on the Company’s consolidated financial position, results of operations, equity or cash flows as of the adoption date or for the three months ended March 31, 2018. Refer to Note 3 "Revenue from Contracts with Customers" for the required disclosures and a discussion of the Company's policies related to revenue recognition.

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, and in November 2016, the FASB issued ASU 2016-18, Restricted Cash. The purpose of ASU 2016-15 is to reduce the diversity in presentation and classification of the following items within the Statement of Cash Flows: debt prepayments, settlement of zero coupon debt instruments, contingent consideration payments, insurance proceeds, securitization transactions and distributions from equity method investees. The update also addresses classification of transactions that have characteristics of more than one class of cash flows. ASU 2016-18 requires the Statement of Cash Flows to explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted 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. The Company adopted these new standards on January 1, 2018 using the retrospective transition method as required with respect to each period presented. The adoption of these standards did not have an impact on the Company’s consolidated financial statements.

Recently Issued Accounting Pronouncements Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 most significantly impacts lessee accounting and disclosures. First, this guidance requires lessees to identify arrangements that should be accounted for as leases. Under ASU 2016-02, for lease arrangements exceeding a 12-month term, a right-of-use asset and lease obligation is recorded by the lessee for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. The Balance Sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. Leases with a term of 12 months or less will be accounted for in a manner similar to existing guidance for operating leases. In addition, ASU 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. This guidance is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted for all entities. The Company has not chosen early adoption for this ASU and is currently evaluating its effect on the Company’s consolidated financial statements. Based on its preliminary assessment, the Company expects to recognize a right-to-use asset and corresponding lease liability on its Balance Sheet related to lease agreement for its corporate headquarters upon adoption of this ASU.