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Segment and Geographic Information - Summary of Net Sales by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2021
Feb. 29, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 71,182 $ 69,780 $ 214,168 $ 205,825
United States        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 58,654 54,889 173,446 163,381
International        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 12,528 $ 14,891 $ 40,722 $ 42,444