Acquisitions - Additional Information (Details)	1 Months Ended						3 Months Ended				6 Months Ended
	Feb. 28, 2019 USD ($)	Dec. 31, 2018 USD ($) club	Sep. 30, 2018 USD ($) club	Aug. 31, 2018 USD ($) club	Apr. 30, 2018 USD ($) club	Jan. 31, 2018 USD ($)	Jun. 30, 2019 USD ($) club	Mar. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2019 USD ($) club	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Number of clubs | club							190				190
Revenues							$ 118,704,000		$ 112,329,000		$ 235,302,000	$ 219,440,000
Net income (loss)							$ (1,557,000)	$ (2,199,000)	601,000	$ 1,129,000	(3,756,000)	1,730,000
Acquisition of asset											$ 0	3,989,000
California | Total Woman
Business Acquisition [Line Items]
Number of clubs | club					12
Around the Clock Fitness
Business Acquisition [Line Items]
Total purchase price, including future consideration	$ 22,222,000
Total allocation of purchase price	$ 21,667,000
Number of clubs | club							6				6
Revenues							$ 3,441,000				$ 4,527,000
Net income (loss)							(420,000)				(395,000)
Around the Clock Fitness | Trade Names
Business Acquisition [Line Items]
Estimated useful life	8 years
Around the Clock Fitness | Non-compete Agreement
Business Acquisition [Line Items]
Estimated useful life	5 years
Acquistion in the Boston Metropolitan Region, December 2018
Business Acquisition [Line Items]
Total purchase price, including future consideration		$ 12,500
Total allocation of purchase price		$ 12,267,000
Number of clubs | club		4
Revenues							3,355,000				6,514,000
Net income (loss)							266,000				149,000
Acquistion in the Boston Metropolitan Region, December 2018 | Trade Names
Business Acquisition [Line Items]
Estimated useful life		5 years
Acquistion in the Boston Metropolitan Region, December 2018 | Non-compete Agreement
Business Acquisition [Line Items]
Estimated useful life		3 years
LIV Fitness
Business Acquisition [Line Items]
Total purchase price, including future consideration			$ 5,000,000
Total allocation of purchase price			$ 4,930,000
Number of clubs | club			2
Revenues							1,477,000				2,671,000
Net income (loss)							(89,000)				(723,000)
Consideration transferred			$ 4,930,000
LIV Fitness | Trade Names
Business Acquisition [Line Items]
Estimated useful life			13 years
Existing Clubs In New York Metropolitan Region
Business Acquisition [Line Items]
Number of clubs | club			2
Revenues							541,000				1,032,000
Net income (loss)							(338,000)				(765,000)
Percentage acquired			60.00%
Percentage retained by seller			40.00%
Existing Clubs In New York Metropolitan Region | New York
Business Acquisition [Line Items]
Number of clubs | club			2
Palm Beach Sports Clubs
Business Acquisition [Line Items]
Total purchase price, including future consideration				$ 7,307,000
Number of clubs | club				3
Revenues							1,057,000				2,503,000
Net income (loss)							11,000				111,000
Consideration transferred				$ 6,697,000
Percentage acquired				85.00%
Percentage retained by seller				15.00%
Amount due to seller, net				$ 610,000
Amount due to seller, net, term				4 years
Total Woman
Business Acquisition [Line Items]
Total purchase price, including future consideration					$ 8,000,000
Total allocation of purchase price					7,265,000
Revenues							5,607,000				10,931,000
Net income (loss)							(288,000)				(139,000)
Consideration transferred					$ 7,265,000
Total Woman | Trade Names
Business Acquisition [Line Items]
Estimated useful life					15 years
Acquisition in the Boston Metropolitan Region, January 2018
Business Acquisition [Line Items]
Total purchase price, including future consideration						$ 2,750,000
Revenues							1,249,000				2,649,000
Net income (loss)							(54,000)				56,000
Consideration transferred						$ 2,866,000
Acquisition in the Boston Metropolitan Region, January 2018 | Non-compete Agreement
Business Acquisition [Line Items]
Estimated useful life						5 years
General and Administrative Expense
Business Acquisition [Line Items]
Acquisition costs incurred							$ 168,000		$ 609,000		$ 317,000	$ 1,014,000
Existing Club In Florida Region
Business Acquisition [Line Items]
Acquisition of asset						$ 4,039,000
Existing Club In Florida Region | Building
Business Acquisition [Line Items]
Acquisition of asset						2,691,000
Existing Club In Florida Region | Land
Business Acquisition [Line Items]
Acquisition of asset						$ 1,021,000