Commitments and Contingencies	6 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company entered into certain commitments under its license agreement with Takeda, or the Takeda Agreement, amended its services agreement with RSI and entered into a separate services agreement with RSG (See Note 4). In addition, the Company has entered into services agreements with third parties for pharmaceutical research and manufacturing activities and has a lease agreement for office space located in Brisbane, California. The manufacturing agreements can be terminated by the Company with 30 days written notice. Expenditures to contract research organizations, or CROs, and contract manufacturing organizations, or CMOs, represent significant costs in the Company’s clinical development of its product candidates. Subject to required notice periods and the Company's obligations under binding purchase orders, the Company can elect to discontinue the work under these agreements at any time. The Company expects to enter into additional commitments as the business further develops. The Company may be, from time to time, a party to various disputes and claims arising from normal business activities. The Company accrues for loss contingencies when available information indicates that it is probable that a liability has been incurred and the amount of such liability can be reasonably estimated. In the cases where the Company believes that a reasonably possible loss exists, the Company discloses the facts and circumstances of the loss contingency, including an estimable range, if possible. During the six months ended September 30, 2017, there were no other material changes outside the ordinary course of business to the specified contractual obligations set forth in the contractual obligations table included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2017, filed with the SEC on June 14, 2017. In October 2017, the Company obtained financing commitments of up to $140.0 million from NovaQuest Capital Management and Hercules Capital, which require the Company to make interest and principal payments at various intervals. The financing commitments are described further in “Note 8—Subsequent Events.”

Commitments and Contingencies

The Company entered into certain commitments under its license agreement with Takeda, or the Takeda Agreement, amended its services agreement with RSI and entered into a separate services agreement with RSG (See Note 4). In addition, the Company has entered into services agreements with third parties for pharmaceutical research and manufacturing activities and has a lease agreement for office space located in Brisbane, California. The manufacturing agreements can be terminated by the Company with 30 days written notice. Expenditures to contract research organizations, or CROs, and contract manufacturing organizations, or CMOs, represent significant costs in the Company’s clinical development of its product candidates. Subject to required notice periods and the Company's obligations under binding purchase orders, the Company can elect to discontinue the work under these agreements at any time. The Company expects to enter into additional commitments as the business further develops.

The Company may be, from time to time, a party to various disputes and claims arising from normal business activities. The Company accrues for loss contingencies when available information indicates that it is probable that a liability has been incurred and the amount of such liability can be reasonably estimated. In the cases where the Company believes that a reasonably possible loss exists, the Company discloses the facts and circumstances of the loss contingency, including an estimable range, if possible.

During the six months ended September 30, 2017, there were no other material changes outside the ordinary course of business to the specified contractual obligations set forth in the contractual obligations table included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2017, filed with the SEC on June 14, 2017. In October 2017, the Company obtained financing commitments of up to $140.0 million from NovaQuest Capital Management and Hercules Capital, which require the Company to make interest and principal payments at various intervals. The financing commitments are described further in “Note 8—Subsequent Events.”