Basis of Presentation and Significant Accounting Policies - Schedule of Clinic Acquisition (Detail)	12 Months Ended					9 Months Ended
Dec. 31, 2012 Clinic	Sep. 30, 2013	Sep. 16, 2013	Feb. 28, 2013	May 22, 2012	Sep. 30, 2013 February 2013 Acquisition [Member] Clinic	Sep. 30, 2013 April 2013 Acquisition [Member] Clinic	Sep. 30, 2013 May 2013 Acquisition [Member] Clinic
Loans At Acquisition Date [Line Items]
Acquisition date						Feb. 28, 2013	Apr. 30, 2013	May 24, 2013
Percentage of interest acquired		100.00%	100.00%	100.00%	70.00%	72.00%	50.00%	80.00%
Number of clinics	7					9	5	5

Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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