Annual report pursuant to Section 13 and 15(d)

DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.21.1
DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
12 Months Ended
Mar. 31, 2021
USD ($)
segment
customer
region
component
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
customer
Concentration Risk      
Components of service revenue | component 3    
Performance obligation, term 45 days    
Advertising expense $ 1,500,000 $ 3,400,000 $ 4,500,000
Shipping and handling fees $ 9,400,000 9,400,000 9,100,000
Number of reportable segments | segment 1    
Number of geographic regions | region 3    
Employer contributions $ 1,200,000 $ 0 $ 0
Minimum      
Concentration Risk      
Product warranty term 1 year    
Finite lived assets useful life (years) 3 years    
Maximum      
Concentration Risk      
Product warranty term 3 years    
Finite lived assets useful life (years) 7 years    
Accounts Receivable | Customer Concentration Risk      
Concentration Risk      
Concentration risk percentage   0.00%  
Accounts Receivable | Customer Concentration Risk | Customer One      
Concentration Risk      
Number of customers (customer) | customer     1
Concentration risk percentage     21.00%
Accounts Receivable | Customer Concentration Risk | Customer Two      
Concentration Risk      
Number of customers (customer) | customer 2    
Concentration risk percentage 22.00%