Payment for line of credit facility termination fee.

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Cash paid for expenses incurred during underwriting activities (the process to review insurance applications, evaluate risks, accept or reject applications, and determine the premiums to be charged) for insurance companies.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Per share or per unit amount of equity securities issued.

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No definition available.

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Number of new stock issued during the period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Organization, Description of Business and Basis for Presentation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Nov. 07, 2017	Sep. 30, 2018	Sep. 30, 2017
Subsidiary Sale of Stock [Line Items]
Offering expense		$ 276	$ 1,057
Proceeds used to repay outstanding indebtedness			$ 7,846
IPO
Subsidiary Sale of Stock [Line Items]
Net proceeds from IPO	$ 65,600
Underwriting discounts and commissions	4,900
Offering expense	5,700
Proceeds used to repay outstanding indebtedness	9,200
Line of credit termination fee	$ 300
IPO \| Common Stock
Subsidiary Sale of Stock [Line Items]
Number of shares issued	7,840,700
Offering price per share	$ 9.00
IPO \| Common Stock \| Underwriters
Subsidiary Sale of Stock [Line Items]
Number of shares issued	1,022,700