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Segment and Geographic Information
 9 Months Ended
Feb. 28, 2021
Segment Reporting [Abstract]  
Segment and Geographic Information SEGMENT AND GEOGRAPHIC INFORMATION
The Company considers the business to be a single operating segment engaged in the development, manufacture and sale of medical devices for vascular access, peripheral vascular disease and oncology on a global basis. The Company's chief operating decision maker, the President and Chief Executive Officer (CEO), evaluates the various global product portfolios on a net sales basis. Executives reporting to the CEO include those responsible for commercial operations, manufacturing operations, regulatory and quality and certain corporate functions. The CEO evaluates profitability, investment and cash flow metrics on a consolidated worldwide basis due to shared infrastructure and resources.
The table below summarizes net sales by Global Business Unit: 
Three Months EndedNine Months Ended
(in thousands)Feb 28, 2021Feb 29, 2020Feb 28, 2021Feb 29, 2020
Net sales
Vascular Interventions & Therapies 
$33,251 $30,552 $97,008 $90,616 
Vascular Access24,813 24,642 76,848 70,585 
Oncology13,118 14,586 40,312 44,624 
Total$71,182 $69,780 $214,168 $205,825 
The table below summarizes net sales by geographic area based on external customer location:
Three Months EndedNine Months Ended
(in thousands)Feb 28, 2021Feb 29, 2020Feb 28, 2021Feb 29, 2020
Net sales
United States$58,654 $54,889 $173,446 $163,381 
International12,528 14,891 40,722 42,444 
Total$71,182 $69,780 $214,168 $205,825