Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policy Information (Details)

v3.21.2
Basis of Presentation and Accounting Policy Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Mar. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Cash and cash equivalents $ 38,242,000 $ 51,362,000 $ 38,242,000 $ 51,362,000 $ 40,124,000  
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows 41,336,000 53,922,000 41,336,000 53,922,000 $ 42,450,000 $ 46,007,000
COVID-19            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Canadian emergency wage subsidy, amount 571,000 2,532 1,510,000 4,948    
Prepaid Expenses and Other Current Assets            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows 2,745,000 2,190,000 2,745,000 2,190,000    
Other Assets            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows $ 349,000 $ 370,000 $ 349,000 $ 370,000