Summary of Accrued (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Summary Of Expenses [Line Items]
Accrued Balance		$ 6,534,000	$ 1,361,000
Charges incurred during the period			6,006,000
Adjustments recorded during the period	[1]	(1,483,000)
Payments during the period		(3,922,000)	(833,000)
Accrued Balance		$ 1,129,000	$ 6,534,000

[1] The adjustments to the accrual recorded in 2015 relate primarily to favorable termination agreements reached with landlords of closed Corporate Medifast Weight Control Centers.