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Significant Accounting Policies - Additional Information (Detail) | 6 Months Ended
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Jun. 30, 2019 USD ($)
Significant Accounting Policies [Line Items] |
Right-of-use asset | $ 2,452,000
Lease liability | 2,452,000
ASU 2016-02 [Member] |
Significant Accounting Policies [Line Items] |
Change in accounting principle for adoption of ASU 2016-01 | 0
Other Assets [Member] |
Significant Accounting Policies [Line Items] |
Right-of-use asset | 2,210,000
Accrued Expenses {Member] |
Significant Accounting Policies [Line Items] |
Lease liability | $ 2,210,000

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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