Note 1 - Preparation of Interim Unaudited Consolidated Financial Statements (Details Textual)	6 Months Ended
Jun. 30, 2018 USD ($)
Churchill Downs Holdings, Ltd. [Member]
Ownership Percentage	5.00%
Reduction of Accrual for Other Long-term Liabilities [Member] \| December 31, 2017 [Member]
Prior Period Reclassification Adjustment	$ 250,000

The amount of a reclassification adjustment made to prior period financial statement amounts.

No definition available.

Name:	us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration