Organization	12 Months Ended
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	1. Organization Intra-Cellular Therapies, Inc. (the “Company”), through its wholly-owned operating subsidiary, ITI, Inc. (“ITI”), is a biopharmaceutical company focused on the discovery and clinical development of innovative, small molecule drugs that address underserved medical needs in neuropsychiatric and neurological disorders by targeting intracellular signaling mechanisms within the central nervous system (“CNS”). The Company’s lead product candidate, ITI-007, is in Phase 3 clinical development as a novel treatment for schizophrenia and bipolar depression. ITI was incorporated in the State of Delaware on May 22, 2001 under the name “Intra-Cellular Therapies, Inc.” and commenced operations in June 2002. ITI was founded to discover and develop drugs for the treatment of neurological and psychiatric disorders. On August 29, 2013, ITI completed a reverse merger (the “Merger”) with a public shell company named Oneida Resources Corp. (“Oneida”). Oneida was formed in August 2012 as a vehicle to investigate and, if such investigation warranted, acquire a target company or business seeking the perceived advantages of being a publicly held corporation. In the Merger, each outstanding share of capital stock of ITI was exchanged for 0.5 shares of common stock of Oneida, and each outstanding option to purchase one share of ITI common stock and each outstanding warrant to purchase one share of ITI common stock was assumed by Oneida and became exercisable for 0.5 shares of Oneida common stock. As a result of the Merger and related transactions, ITI survived as a wholly-owned subsidiary of Oneida, Oneida changed its fiscal year end from March 31 to December 31, and Oneida changed its name to Intra-Cellular Therapies, Inc. (the “Company”). In addition, the Company began operating ITI and its business, and therefore ceased being a shell company. Following the Merger and the redemption of all then outstanding shares of Oneida at the closing of the Merger, the former stockholders of ITI owned 100% of the shares of the Company’s outstanding capital stock. In accordance with Financial Accounting Standards Board (“FASB”), Accounting Standards Codification (“ASC”) Topic 805, Business Combinations, ITI is considered the acquirer for accounting purposes, and has accounted for the transaction as a capital transaction, because ITI’s former stockholders received 100% of the voting rights in the combined entity and ITI’s senior management represented all of the senior management of the combined entity. Consequently, the assets and liabilities and the historical operations that are reflected in the Company’s consolidated financial statements are those of ITI and have been recorded at the historical cost basis of the Company. All share and per share amounts in the consolidated financial statements and related notes have been retrospectively adjusted to reflect the one-for-0.5 shares of capital stock exchange as well as the conversion of the Notes (defined below) and the Series A, B, and C redeemable convertible preferred stock of ITI. Immediately prior to the Merger, on August 29, 2013, ITI sold to accredited investors approximately $60.0 million of its shares of common stock, or 18,889,307 shares at a price of $3.1764 per share (the “Private Placement”), which included $15.3 million in principal and $0.8 million in accrued interest from the conversion of ITI’s then outstanding convertible promissory notes (the “Notes”). On February 5, 2014, the Company completed a public offering of common stock in which the Company sold 7,063,300 shares of common stock, which included the exercise of the underwriters’ option to purchase an additional 921,300 shares, at an offering price of $17.50 per share. After deducting underwriting discounts, commissions and offering expenses, the net proceeds to the Company were approximately $115.4 million. On October 31, 2014, the Company entered into a termination agreement with Takeda Pharmaceutical Company Limited (“Takeda”) terminating the worldwide license and collaboration agreement under which the Company and Takeda were jointly developing the Company’s proprietary compound ITI-214 and other selected compounds that selectively inhibit phosphodiesterase type 1 (“PDE1”) for use in the prevention and treatment of human diseases. Through December 31, 2015, the Company had received $29.0 million in total payments under the agreement and was eligible to receive milestone payments and royalties based on net sales. On September 15, 2015, Takeda completed the transfer of the Investigational New Drug application (“IND”) for ITI-214 to the Company. The Company intends to explore the development of its PDE program, including ITI-214 for the treatment of several CNS and non-CNS conditions. On March 11, 2015, the Company completed a public offering of common stock in which the Company sold 5,411,481 shares of common stock, which included the exercise of the underwriters’ option to purchase an additional 661,481 shares, at an offering price of $24.00 per share. After deducting underwriting discounts, commissions and offering expenses, the net proceeds to the Company were approximately $121.8 million. On September 28, 2015, the Company completed a public offering of common stock in which the Company sold 7,935,000 shares of common stock, which included the exercise of the underwriters’ option to purchase an additional 1,035,000 shares, at an offering price of $43.50 per share. After deducting underwriting discounts, commissions and offering expenses, the net proceeds to the Company were approximately $327.4 million. In order to further its research projects and support its collaborations, the Company will require additional financing until such time, if ever, that revenue streams are sufficient to generate consistent positive cash flow from operations. Possible sources of funds include public or private sales of the Company’s equity securities, sales of debt securities, the incurrence of debt from commercial lenders, strategic collaborations, licensing a portion or all of the Company’s product candidates and technology and, to a lesser extent, grant funding.

1. Organization

Intra-Cellular Therapies, Inc. (the “Company”), through its wholly-owned operating subsidiary, ITI, Inc. (“ITI”), is a biopharmaceutical company focused on the discovery and clinical development of innovative, small molecule drugs that address underserved medical needs in neuropsychiatric and neurological disorders by targeting intracellular signaling mechanisms within the central nervous system (“CNS”). The Company’s lead product candidate, ITI-007, is in Phase 3 clinical development as a novel treatment for schizophrenia and bipolar depression.

ITI was incorporated in the State of Delaware on May 22, 2001 under the name “Intra-Cellular Therapies, Inc.” and commenced operations in June 2002. ITI was founded to discover and develop drugs for the treatment of neurological and psychiatric disorders.

On August 29, 2013, ITI completed a reverse merger (the “Merger”) with a public shell company named Oneida Resources Corp. (“Oneida”). Oneida was formed in August 2012 as a vehicle to investigate and, if such investigation warranted, acquire a target company or business seeking the perceived advantages of being a publicly held corporation. In the Merger, each outstanding share of capital stock of ITI was exchanged for 0.5 shares of common stock of Oneida, and each outstanding option to purchase one share of ITI common stock and each outstanding warrant to purchase one share of ITI common stock was assumed by Oneida and became exercisable for 0.5 shares of Oneida common stock. As a result of the Merger and related transactions, ITI survived as a wholly-owned subsidiary of Oneida, Oneida changed its fiscal year end from March 31 to December 31, and Oneida changed its name to Intra-Cellular Therapies, Inc. (the “Company”). In addition, the Company began operating ITI and its business, and therefore ceased being a shell company. Following the Merger and the redemption of all then outstanding shares of Oneida at the closing of the Merger, the former stockholders of ITI owned 100% of the shares of the Company’s outstanding capital stock.

In accordance with Financial Accounting Standards Board (“FASB”), Accounting Standards Codification (“ASC”) Topic 805, Business Combinations, ITI is considered the acquirer for accounting purposes, and has accounted for the transaction as a capital transaction, because ITI’s former stockholders received 100% of the voting rights in the combined entity and ITI’s senior management represented all of the senior management of the combined entity. Consequently, the assets and liabilities and the historical operations that are reflected in the Company’s consolidated financial statements are those of ITI and have been recorded at the historical cost basis of the Company. All share and per share amounts in the consolidated financial statements and related notes have been retrospectively adjusted to reflect the one-for-0.5 shares of capital stock exchange as well as the conversion of the Notes (defined below) and the Series A, B, and C redeemable convertible preferred stock of ITI.

Immediately prior to the Merger, on August 29, 2013, ITI sold to accredited investors approximately $60.0 million of its shares of common stock, or 18,889,307 shares at a price of $3.1764 per share (the “Private Placement”), which included $15.3 million in principal and $0.8 million in accrued interest from the conversion of ITI’s then outstanding convertible promissory notes (the “Notes”).

On February 5, 2014, the Company completed a public offering of common stock in which the Company sold 7,063,300 shares of common stock, which included the exercise of the underwriters’ option to purchase an additional 921,300 shares, at an offering price of $17.50 per share. After deducting underwriting discounts, commissions and offering expenses, the net proceeds to the Company were approximately $115.4 million.

On October 31, 2014, the Company entered into a termination agreement with Takeda Pharmaceutical Company Limited (“Takeda”) terminating the worldwide license and collaboration agreement under which the Company and Takeda were jointly developing the Company’s proprietary compound ITI-214 and other selected compounds that selectively inhibit phosphodiesterase type 1 (“PDE1”) for use in the prevention and treatment of human diseases. Through December 31, 2015, the Company had received $29.0 million in total payments under the agreement and was eligible to receive milestone payments and royalties based on net sales. On September 15, 2015, Takeda completed the transfer of the Investigational New Drug application (“IND”) for ITI-214 to the Company. The Company intends to explore the development of its PDE program, including ITI-214 for the treatment of several CNS and non-CNS conditions.

On March 11, 2015, the Company completed a public offering of common stock in which the Company sold 5,411,481 shares of common stock, which included the exercise of the underwriters’ option to purchase an additional 661,481 shares, at an offering price of $24.00 per share. After deducting underwriting discounts, commissions and offering expenses, the net proceeds to the Company were approximately $121.8 million.

On September 28, 2015, the Company completed a public offering of common stock in which the Company sold 7,935,000 shares of common stock, which included the exercise of the underwriters’ option to purchase an additional 1,035,000 shares, at an offering price of $43.50 per share. After deducting underwriting discounts, commissions and offering expenses, the net proceeds to the Company were approximately $327.4 million.

In order to further its research projects and support its collaborations, the Company will require additional financing until such time, if ever, that revenue streams are sufficient to generate consistent positive cash flow from operations. Possible sources of funds include public or private sales of the Company’s equity securities, sales of debt securities, the incurrence of debt from commercial lenders, strategic collaborations, licensing a portion or all of the Company’s product candidates and technology and, to a lesser extent, grant funding.