Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
Aug. 31, 2018	Aug. 31, 2018
Indefinite-lived Intangible Assets [Line Items]
Changes in carrying value of goodwill	$ 0	$ 100,000
Motorsports Event
Indefinite-lived Intangible Assets [Line Items]
Decrease in net carrying amount due to sale of certain business operations	$ 100,000	$ 100,000

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

Name:	us-gaap_GoodwillPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration