Quarterly Financial Data (Unaudited) - Selected Unaudited Quarterly Financial Information (Parenthetical) (Detail) - Redeemable Preferred Stock [Member]		12 Months Ended
Nov. 29, 2018	Dec. 31, 2018
Quarterly Financial Information [Line Items]
Preferred stock dividend rate	12.00%	12.00%
Redemption value accretion period (in years)	7 years
Expected redemption date	Nov. 29, 2025

Date the preferred stock has been redeemed, in CCYY-MM-DD format.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21564-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

Name:	us-gaap_PreferredStockRedemptionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration