Investment in equity securities - Additional Information (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Apr. 14, 2017 |
|
Debt and Equity Securities, FV-NI [Line Items] | |||||
Impairment charges on investment | $ 0 | $ 0 | $ 0 | $ 0 | |
Social Media Analytics Company | |||||
Debt and Equity Securities, FV-NI [Line Items] | |||||
Amount invested in minority equity investment | $ 2,900,000 |