INCOME TAXES, Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Deferred Tax Assets [Abstract]
Accrued vacation	$ 2,167	$ 1,596
Deferred revenue	1,260	668
Reserve for credit losses	587	607
Restricted stock	1,455	1,270
Other accruals and reserves	1,430	1,497
Other credits and carryforwards	1,065	1,335
Gross deferred tax assets	7,964	6,973
Less: valuation allowance	(1,065)	(1,335)
Net deferred tax assets	6,899	5,638
Deferred Tax Liabilities [Abstract]
Basis difference in fixed assets	(2,150)	(1,570)
Basis difference in operating leases	(9,197)	(4,517)
Basis difference in tax deductible goodwill	(467)	(1,213)
Total deferred tax liabilities	(11,814)	(7,300)
Net deferred tax liabilities	$ (4,915)	$ (1,662)