Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policy Information (Details)

v3.20.2
Basis of Presentation and Accounting Policy Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Mar. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Cash and cash equivalents $ 51,362,000 $ 51,362,000 $ 43,237,000 $ 39,014,000  
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows 53,922,000 53,922,000 $ 46,007,000 41,541,000 $ 33,841,000
COVID-19          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Canadian emergency wage subsidy, amount 2,532,000 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 2,190,000 2,190,000   2,054,000  
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 $ 370,000 $ 370,000   $ 473,000