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Basis of Presentation and Significant Accounting Policies - Schedule of Clinic Acquisition (Detail) |  |  |  | 12 Months Ended
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Sep. 16, 2013 | Jun. 01, 2013 | Feb. 01, 2013 | Dec. 31, 2013 February 2013 Acquisition Clinic | Dec. 31, 2013 April 2013 Acquisition Clinic | Dec. 31, 2013 May 2013 Acquisition Clinic | Dec. 31, 2013 December 9, 2013 Acquisition Clinic | Dec. 31, 2013 December 13, 2013 Acquisition Clinic
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition date |  |  |  | Feb. 28, 2013 | Apr. 30, 2013 | May 24, 2013 | Dec. 09, 2013 | Dec. 13, 2013
Percentage of interest acquired | 100.00% | 100.00% | 100.00% | 72.00% | 50.00% | 80.00% | 60.00% | 90.00%
Number of Clinics |  |  |  | 9 | 5 | 5 | 12 | 11

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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References 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 + Details
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- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
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