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Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | Jul. 23, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019
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Common Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of shares issued and sold |  | 63,026,001 | 62,147,140 | 61,276,933 | 60,550,093
Subsequent Events [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Gross proceeds form sale of shares | $ 175.0 |  |  |  |
Subsequent Events [Member] | Common Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of shares issued and sold | 4,474,559 |  |  |  |
Shares sold, purchase price | $ 39.11 |  |  |  |

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- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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