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Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands | Jan. 31, 2021 | Apr. 30, 2020
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 9,193 | $ 6,765
Less: Accumulated depreciation | (3,653) | (2,772)
Property and equipment, net | 5,540 | 3,993
Furniture and Fixtures |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 242 | 180
Computer Equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 1,888 | 1,209
Laboratory Equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 6,075 | 4,818
Asset In Progress |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 984 | 554
Leasehold Improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 4 | $ 4

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- Definition Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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