Saddlebrook Rental Pool Operation - Schedule of Financial Information - Statements of Operations (Detail) - Saddlebrook Rental Pool Operation [Member] - Distribution Fund [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Supplementary Financial Statements For Owners Participating In Condo Rental Pool Agreement [Line Items]
Rental pool revenues	$ 940,783	$ 1,077,320	$ 6,837,458	$ 6,940,134
Deductions:
Marketing fee	70,559	80,799	512,809	520,510
Management fee	117,598	134,665	854,682	867,517
Travel agent commissions	133,515	82,573	486,262	484,304
Credit card expense	35,118	38,332	205,591	195,037
Bad debt expense		5,000		45,000
Rental expenses	356,790	341,369	2,059,344	2,112,368
Net rental income	583,993	735,951	4,778,114	4,827,766
Less operator share of net rental income	(262,797)	(331,178)	(2,150,152)	(2,172,494)
Other revenues (expenses):
Complimentary room revenues	2,334	8,702	22,252	28,509
Minor repairs and replacements	(24,048)	(36,945)	(71,187)	(99,122)
Amount available for distribution	$ 299,482	$ 376,530	$ 2,579,027	$ 2,584,659