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Subsequent Event - Additional Information (Detail) | Oct. 04, 2021 USD ($) $ / shares shares | Sep. 30, 2021 USD ($) $ / shares | Oct. 01, 2016 USD ($)
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Subsequent Event [Line Items] |  |  |
Conversion price of Notes | $ / shares |  | $ 4.67 |
Debt instrument face amount |  |  | $ 3,000,000.0
Termination And Settlement Agreement [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Debt instrument face amount |  | $ 14,500,000 |
Subsequent Event [Member] | Termination And Settlement Agreement [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Debt Conversion, Converted Instrument, Amount | $ 2,500,000 |  |
Conversion price of Notes | $ / shares | $ 6.60 |  |
Debt conversion amount | $ 6,500,000 |  |
Debt conversion into equity | $ 500,000 |  |
Price Per share used for Ascertaining Number of shares to be issued | $ / shares | $ 4.95 |  |
Percentage of share volume-weighted average price per share used for Ascertaining Number of shares to be issued | 90 |  |
Debt instrument face amount | $ 14,500,000 |  |
Subsequent Event [Member] | Not later than December 1, 2021 [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Debt instrument, number of shares | shares | 984,848 |  |
Debt Conversion, Converted Instrument, Amount | $ 3,000,000.0 |  |

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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 + Details
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- Definition The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 + Details
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