Description of Business (Details) - Majority Shareholder - Sumitomo Dainippon Pharma Co., Ltd. - shares	Mar. 31, 2021	Dec. 27, 2019
Noncontrolling Interest [Line Items]
Number of shares issued (in shares)	48,641,181	45,008,604
Ownership percentage	53.50%	50.20%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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