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v3.21.1

Term Loan Payable - Additional Information (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2020 | Nov. 30, 2016 | Mar. 31, 2021 | Mar. 31, 2020
Debt Instrument [Line Items] |  |  |  |
Debt issuance costs |  |  | $ 1 | $ 20
Term Loan [Member] | Silicon Valley Bank [Member] | Loan and Security Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term loan |  | $ 3,500 |  |
Annual Interest rate |  | 1.75% |  |
Debt issuance costs |  | $ 300 |  |
Effective interest rate |  |  | 5.14% |
Interest Expense |  |  | $ 100 | $ 100
Maturity date |  | Nov. 01, 2020 |  |
Term Loan [Member] | Silicon Valley Bank [Member] | Amended Loan and Security Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date | May 01, 2021 |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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