Nature of business	3 Months Ended
Mar. 31, 2017
Nature of business
Nature of business	VOYAGER THERAPEUTICS INC. NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS 1. Nature of business Voyager Therapeutics, Inc. (“the Company”) is a clinical stage gene therapy company focused on developing life changing treatments for patients suffering from severe neurological diseases. The Company focuses on neurological diseases where it believes that an adeno associated virus (“AAV”) gene therapy approach can have a clinically meaningful impact by either increasing or decreasing the production of a specific protein. The Company has created a product engine that enables it to engineer, optimize, manufacture and deliver its AAV based gene therapies that have the potential to provide durable efficacy following a single administration. The Company’s pipeline consists of six programs including advanced Parkinson's disease; a monogenic form of amyotrophic lateral sclerosis; Huntington's disease; Friedreich's ataxia; frontotemporal dementia / Alzheimer’s disease; and severe, chronic pain. The Company is devoting substantially all of its efforts to product research and development, activities related to its product engine, and raising capital. The Company is subject to risks common to companies in the biotechnology and gene therapy industry, including but not limited to, risks of failure of pre-clinical studies, and clinical trials, the need to obtain marketing approval for its drug product candidates, the need to successfully commercialize and gain market acceptance of its drug product candidates, dependence on key personnel, protection of proprietary technology, compliance with government regulations, development by competitors of technological innovations and ability to transition from pilot scale manufacturing to large scale production of products. In February 2015, the Company entered into an agreement with Genzyme (“Collaboration Agreement”), which included a non-refundable upfront payment of $65.0 million. In addition, contemporaneous with entering into the Collaboration Agreement, Genzyme entered into a Series B Stock Purchase Agreement, under which Genzyme purchased 10,000,000 shares of Series B Preferred Stock for $30.0 million. Through March 31, 2017, the Company had raised approximately $278.0 million of proceeds from sales of convertible preferred stock and common stock, including its initial public offering, and proceeds from the Collaboration Agreement. The Company believes that its cash, cash equivalents, and marketable debt securities of $157.7 million as of March 31, 2017 is sufficient to fund its current operating plan into 2019. There can be no assurance, however, that the current operating plan will be achieved in the timeframe anticipated by the Company, or that its cash resources will fund the Company’s operating plan for the period anticipated by the Company, or if the Company needs additional funding that such funding will be available on terms acceptable to the Company, or at all.

VOYAGER THERAPEUTICS INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Nature of business

Voyager Therapeutics, Inc. (“the Company”) is a clinical stage gene therapy company focused on developing life changing treatments for patients suffering from severe neurological diseases. The Company focuses on neurological diseases where it believes that an adeno associated virus (“AAV”) gene therapy approach can have a clinically meaningful impact by either increasing or decreasing the production of a specific protein. The Company has created a product engine that enables it to engineer, optimize, manufacture and deliver its AAV based gene therapies that have the potential to provide durable efficacy following a single administration. The Company’s pipeline consists of six programs including advanced Parkinson's disease; a monogenic form of amyotrophic lateral sclerosis; Huntington's disease; Friedreich's ataxia; frontotemporal dementia / Alzheimer’s disease; and severe, chronic pain.

The Company is devoting substantially all of its efforts to product research and development, activities related to its product engine, and raising capital. The Company is subject to risks common to companies in the biotechnology and gene therapy industry, including but not limited to, risks of failure of pre-clinical studies, and clinical trials, the need to obtain marketing approval for its drug product candidates, the need to successfully commercialize and gain market acceptance of its drug product candidates, dependence on key personnel, protection of proprietary technology, compliance with government regulations, development by competitors of technological innovations and ability to transition from pilot scale manufacturing to large scale production of products.

In February 2015, the Company entered into an agreement with Genzyme (“Collaboration Agreement”), which included a non-refundable upfront payment of $65.0 million. In addition, contemporaneous with entering into the Collaboration Agreement, Genzyme entered into a Series B Stock Purchase Agreement, under which Genzyme purchased 10,000,000 shares of Series B Preferred Stock for $30.0 million.

Through March 31, 2017, the Company had raised approximately $278.0 million of proceeds from sales of convertible preferred stock and common stock, including its initial public offering, and proceeds from the Collaboration Agreement. The Company believes that its cash, cash equivalents, and marketable debt securities of $157.7 million as of March 31, 2017 is sufficient to fund its current operating plan into 2019. There can be no assurance, however, that the current operating plan will be achieved in the timeframe anticipated by the Company, or that its cash resources will fund the Company’s operating plan for the period anticipated by the Company, or if the Company needs additional funding that such funding will be available on terms acceptable to the Company, or at all.