Number of new stock issued during the period.

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Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Stockholders' Equity (Details) - USD ($) $ in Thousands		9 Months Ended
Stockholders' Equity (Details) - USD ($) $ in Thousands	Oct. 01, 2018	Sep. 30, 2018	Sep. 30, 2017
Subsidiary Sale Of Stock [Line Items]
Common stock issued, Shares		316,080
Proceeds from issuance of common stock		$ 7,901	$ 1,377
IPO [Member] \| Subsequent Event [Member]
Subsidiary Sale Of Stock [Line Items]
Common stock issued, Shares	4,485,000
Proceeds from issuance of common stock	$ 67,300