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Equity Compensation Plan - Additional Information (Detail) - USD ($) |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Aug. 23, 2018 | Nov. 20, 2017 | Nov. 20, 2016 | Nov. 20, 2015 | Nov. 20, 2014 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |  |  |  |  |
Dividends, total |  |  |  |  |  | $ 0 | $ 0 | $ 0
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, fair value |  |  |  |  |  | $ 844,141 | 0 | 220,907
Non Vested Restricted Stock [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period | 264,621 |  |  |  | 230,713 |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value | $ 3.59 |  |  |  | $ 7.58 |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period | 1 year |  |  |  | 3 years |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period |  | 57,678 | 57,678 | 115,357 |  | 264,621 |  |
Restricted Stock [Member] | General and Administrative Expense [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |  |  |  |  |
Allocated share-based compensation expense, total |  |  |  |  |  | $ 611,644 | $ 338,356 | $ 129,245
The Plan Member |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |  |  |  |  |
Common stock, reserved percentage |  |  |  |  |  | 10.00% |  |
The Plan Member | Restricted Stock [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period |  |  |  |  |  | 264,621 |  |
2007 Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period |  |  |  |  |  | 555,479 |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(1) -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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