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Employee Benefit Plan - Additional Information (Detail) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
The 401k profit sharing plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan Expense | $ 454,439 | $ 364,653
Defined contribution Plan Eligibility | Employees become eligible to participate in the discretionary contributions after one year of continuous service and the benefits vest over a five-year period |
Employee stock ownership plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Shares Issued Under Employee Benefit plan | 79,800 | 79,800
Maximum [Member] | The 401k profit sharing plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Employer Matching Contribution | 5.00% |

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. + References No definition available. + Details
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- Definition Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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