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Equity Compensation Plan - Summary of Nonvested Restricted Shares (Detail) - Non Vested Restricted Stock [Member] - $ / shares |  |  |  | 12 Months Ended
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Nov. 20, 2017 | Nov. 20, 2016 | Nov. 20, 2015 | Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |
Non-vested, January 1, 2019, Number of restricted shares |  |  |  | 264,621
Vested, Number of restricted shares | (57,678) | (57,678) | (115,357) | (264,621)
Non-vested, December 31, 2019, Number of restricted shares |  |  |  | 0
Non-vested, January 1, 2019, Weighted average grant date fair value per non-vested share |  |  |  | $ 3.59
Vested, Weighted average grant date fair value per non-vested share |  |  |  | 3.59
Non-vested, December 31, 2019, Weighted average grant date fair value per non-vested share |  |  |  | $ 0

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] + References No definition available. + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Details
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