REVENUE FROM CONTRACTS WITH CUSTOMERS: Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 104,661	$ 90,143	$ 204,098	$ 172,654
Subscription
Disaggregation of Revenue [Line Items]
Revenues			168,699	140,293
Marketplace and Other
Disaggregation of Revenue [Line Items]
Revenues			35,399	32,361
United States
Disaggregation of Revenue [Line Items]
Revenues			191,487	160,448
Europe
Disaggregation of Revenue [Line Items]
Revenues			10,283	9,739
APAC
Disaggregation of Revenue [Line Items]
Revenues			$ 2,328	$ 2,467