FINANCING RECEIVABLES AND OPERATING LEASES (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019	Mar. 31, 2020		Mar. 31, 2019
Profit Recognized for Sales-type Leases [Abstract]
Net sales		$ 7,655		$ 3,133	$ 17,818		$ 7,987
Cost of sales		5,402		2,702	10,729		6,652
Gross Profit		2,253		431	7,089		1,335
Interest Income on Sales-type Leases [Abstract]
Interest Income on sales-type leases		1,884		1,495	4,103		3,590
Lease income on operating leases		3,900		5,059	7,738		10,418
Financing Receivables [Abstract]
Estimated unguaranteed residual value		12,644			12,644
Initial direct costs, net of amortization		364			364
Reserve for credit losses		(4,894)		(2,868)	(4,894)		(2,868)	$ (3,189)		$ (2,614)
Reported as [Abstract]
Current		92,766			92,766			70,169
Future scheduled minimum lease payments [Abstract]
Remainder of year ending March 31, 2021		46,006			46,006
Year ending March 31, 2022		19,376			19,376
Year ending March 31, 2023		8,196			8,196
Year ending March 31, 2024		2,205			2,205
Year ending March 31, 2025 and thereafter		917			917
Total		76,700			76,700
Estimated unguaranteed residual values for direct financing lease		12,644			12,644			14,972
Investment in operating lease equipment - net [Abstract]
Cost of equipment under operating leases		19,578			19,578			21,276
Accumulated depreciation		(12,272)			(12,272)			(11,159)
Investment in operating lease equipment - net	[1]	7,306			7,306			10,117
Unguaranteed residual value of operating lease equipment net		2,500			2,500			3,100
Future scheduled minimum lease rental payments [Abstract]
Remainder of year ending March 31, 2021		1,534			1,534
Year ending March 31, 2022		1,927			1,927
Year ending March 31, 2023		1,436			1,436
Year ending March 31, 2024		477			477
Year ending March 31, 2025 and thereafter		35			35
Total		5,409			5,409
Collateral for non-recourse notes payable - Finance receivables		33,700			33,700			34,600
Collateral for non-recourse notes payable - Operating leases		4,900			4,900			6,700
Gain on sale of financing receivables		4,500		4,100	7,000		7,500
Proceeds from sale of financing receivables		118,500		95,100	191,700		172,000
Contract liabilities - servicing of financial assets		400			400			400
Notes Receivables [Member]
Financing Receivables [Abstract]
Minimum payments		90,002			90,002			55,417
Estimated unguaranteed residual value		0	[2]		0	[2]		0	[3]
Initial direct costs, net of amortization	[4]	364			364			212
Unearned income		0			0			0
Reserve for credit losses		(1,337)	[4]	(520)	(1,337)	[4]	(520)	(798)	[4]	(505)
Total, net		89,029			89,029			54,831
Reported as [Abstract]
Current		52,397			52,397			31,181
Long-term		36,632			36,632			23,650
Total, net		89,029			89,029			54,831
Lease Receivables [Member]
Financing Receivables [Abstract]
Minimum payments		76,700			76,700			69,492
Estimated unguaranteed residual value		20,213	[2]		20,213	[2]		21,862	[3]
Initial direct costs, net of amortization	[4]	0			0			247
Unearned income		(11,329)			(11,329)			(11,612)
Reserve for credit losses		(1,227)	[4]	$ (500)	(1,227)	[4]	$ (500)	(610)	[4]	$ (530)
Total, net		84,357			84,357			79,379
Reported as [Abstract]
Current		40,369			40,369			38,988
Long-term		43,988			43,988			40,391
Total, net		84,357			84,357			79,379
Financing Receivables [Member]
Financing Receivables [Abstract]
Minimum payments		166,702			166,702			124,909
Estimated unguaranteed residual value		20,213	[2]		20,213	[2]		21,862	[3]
Initial direct costs, net of amortization	[4]	364			364			459
Unearned income		(11,329)			(11,329)			(11,612)
Reserve for credit losses	[4]	(2,564)			(2,564)			(1,408)
Total, net		173,386			173,386			134,210
Reported as [Abstract]
Current		92,766			92,766			70,169
Long-term		80,620			80,620			64,041
Total, net		$ 173,386			$ 173,386			$ 134,210

[1] Amounts include estimated unguaranteed residual values of $2.5 million and $3.1 million as of September 30, 2020, and March 31, 2020, respectively.

[2] Includes unguaranteed residual values of $12,644 thousand that we retained after selling the related lease receivable.

[3] Includes unguaranteed residual values of $14,972 thousand for sales type leases, which have been sold and accounted for as sales.

[4] Refer to Note 7, “Allowance for Credit Losses” for details.