ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: - Summary of the activity of the allowance for doubtful accounts, returns and credits (Details) - Allowance for doubtful accounts returns and credits - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 3,007	$ 3,182	$ 2,137
Additions charged to costs and expenses	7,133	3,069	1,214
Other changes	86	(92)	123
Bad debts written off, net of amounts recovered	(2,651)	(3,152)	(292)
Balance at end of period	$ 7,575	$ 3,007	$ 3,182