Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policy Information (Details)

v3.20.4
Basis of Presentation and Accounting Policy Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Cash and cash equivalents $ 49,617,000 $ 49,617,000 $ 43,237,000 $ 37,054,000  
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows 52,311,000 52,311,000 $ 46,006,000 39,688,000 $ 33,841,000
COVID-19          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Canadian emergency wage subsidy, amount 979,000 5,928      
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 2,314,000 2,314,000   2,123,000  
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 $ 380,000 $ 380,000   $ 511,000