Annual report pursuant to Section 13 and 15(d)

Segment Reporting - Narrative (Details)

v3.19.3.a.u2
Segment Reporting - Narrative (Details)
12 Months Ended
Dec. 31, 2019
segment
clinic
Dec. 31, 2018
clinic
Segment Reporting [Abstract]    
Number of stores | clinic 513 442
Number of operating segments | segment 2