INCOME TAXES (Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Feb. 28, 2022	Feb. 28, 2021
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 33,379	$ 27,194
Depreciation, amortization and impairments	(5,001)	(2,117)
Research and development credits	23,484	21,917
Stock-based compensation	1,795	2,944
Other tax credits	2,211	2,197
Capitalized research costs	2,657	2,638
ROU asset	(3,122)	(3,528)
Lease liabilities	4,667	5,472
Payroll and employee benefit accruals	1,906	1,984
Allowance for doubtful accounts	677	1,163
Other accrued liabilities	3,365	4,743
Convertible debt	(6,573)	(8,185)
Other, net	8,236	5,137
Total deferred tax assets (liabilities)	67,681	61,559
Valuation allowance	(63,732)	(56,848)
Net deferred tax assets (liabilities)	3,949	4,711
Reported as:
Deferred tax assets	4,165	4,889
Deferred tax liabilities	(216)	(178)
Net deferred tax assets (liabilities)	$ 3,949	$ 4,711