LEASE ARRANGEMENTS - Lease, Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 2,134	$ 2,093
Short-term lease cost	316	439
Variable lease cost	760	342
Total lease cost	3,210	2,874
Operating leases
Operating lease ROU assets	7,757	8,116
Operating lease liabilities	$ 8,445	$ 8,647
Weighted-average remaining lease term
Operating leases	13 years 9 months	14 years 4 months
Weighted-average discount rate
Operating leases	4.37%	4.50%