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Financial Instruments - Additional Information (Detail) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
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Fair Value Of Financial Instruments [Line Items] |  |
Long term debt, including capital lease obligations and current installments | $ 252,566,854 | $ 225,630,874
Term Loan [Member] |  |
Fair Value Of Financial Instruments [Line Items] |  |
Long-term debt | $ 252,000,000 | $ 225,000,000

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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=6879938&loc=d3e572229-122910 + Details
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