INCOME TAXES - Research and Development Tax Credits (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2023	Jan. 31, 2023
INCOME TAXES
Federal research and development tax credits	$ 5,800
Development tax credit	2,400
Income tax refunds and prepaid income taxes	$ 16,233	$ 15,327

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

Name:	us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration