Inclusion Criteria:  A clinical diagnosis of hidradenitis suppurativa (HS) for at least 1 year prior to Baseline as determined by the investigator. A total abscess and inflammatory nodule (AN) count of >= 5 at Baseline HS lesions must be present in at least 2 distinct anatomic areas. Must have failed anti-TNF treatment for HS.  Exclusion Criteria:  - History of active skin disease other than HS that could interfere with the assessment of HS, including skin infections (e.g., bacterial, fungal, or viral) requiring systemic treatment within 4 weeks of the Baseline visit.