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Subsequent Events - Additional Information (Detail) - USD ($) |  | 12 Months Ended
--- | --- | ---
Mar. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Subsequent Event [Line Items] |  |  |
Common stock, par value |  | $ 0.001 | $ 0.001
Proceeds from issuance of common stock |  | $ 9,000,000 | $ 9,676,000
Subsequent Event [Member] | Open Market Sale Agreement [Member] | Jefferies LLC [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Common stock, par value | $ 0.001 |  |
Percentage of gross proceeds of shares of common stock | 3.00% |  |
Subsequent Event [Member] | Open Market Sale Agreement [Member] | Jefferies LLC [Member] | Maximum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Proceeds from issuance of common stock | $ 75,000,000 |  |

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- Definition Percentage of gross proceeds of shares of common stock. + References No definition available. + Details
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Namespace Prefix: | nvus_
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Balance Type: | na
Period Type: | duration

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + 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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- 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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- Details
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- Details
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