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Summary of significant accounting policies (Tables)
6 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]  
Disaggregation of Revenue
The following table provides disaggregated revenue from contracts with customers by geographical market, as the nature, amount, timing and uncertainty of revenue and cash flows can differ between domestic and international customers (in thousands).
 Three months ended September 30,Six months ended September 30,
Net sales by geographic region:2021202020212020
United States$81,831 $63,655 $168,463 $121,552 
International10,024 8,695 20,439 15,325 
Total net sales$91,855 $72,350 $188,902 $136,877