LEASE ARRANGEMENTS - Lease, Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 2,093
Short-term lease cost	439
Variable lease cost	342
Sublease income	0
Total lease cost	2,874
Operating leases
Operating lease ROU assets	8,116	$ 0
Total lease liabilities	$ 8,647
Weighted-average remaining lease term
Operating leases	14 years 4 months
Weighted-average discount rate
Operating leases	4.50%