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Long-term Investment (Details)
$ in Thousands, shares in Millions
1 Months Ended 12 Months Ended
Feb. 25, 2019
USD ($)
shares
May 31, 2020
USD ($)
shares
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
May 31, 2020
€ / shares
Feb. 13, 2019
shares
Equity Securities without Readily Determinable Fair Value [Line Items]            
Maximum shares to be purchased under subscription agreement (in shares) | shares           8.1
Number of shares acquired during period (in shares) | shares 5.9          
Long-term investment $ 5,900   $ 5,871 $ 5,871    
Investee | Subscription Agreement, Reimbursements            
Equity Securities without Readily Determinable Fair Value [Line Items]            
Reimbursements received       3,600    
Investee | Transition Services Agreement, Reimbursements, Employee Compensation Expense            
Equity Securities without Readily Determinable Fair Value [Line Items]            
Reimbursements received     $ 200 100    
Investee | Transition Services Agreement, Reimbursements, Other Costs            
Equity Securities without Readily Determinable Fair Value [Line Items]            
Reimbursements received       $ 200    
Subsequent Event            
Equity Securities without Readily Determinable Fair Value [Line Items]            
Number of shares acquired during period (in shares) | shares   2.2        
Long-term investment   $ 2,200        
Subsequent Event | Long-term Investee            
Equity Securities without Readily Determinable Fair Value [Line Items]            
Par value (in EUR per share) | € / shares         € 0.00001