Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
May 28, 2018	Jun. 30, 2018
Related Party Transaction [Line Items]
Fund movement description		In May 2018, the Company moved the entire funds from a certificate of deposit account to a money market account.
First Home Bank [Member]
Related Party Transaction [Line Items]
Certificate of deposits maturity period		6 months
Certificates of deposits value		$ 15,094
Certificates of deposits fixed interest rate		1.95%
Oxbridge [Member]
Related Party Transaction [Line Items]
Payment for contract termination settlement fee	$ 600
Derecognition of accrued benefits	$ 622

A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_CertificatesOfDepositAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant