CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Jul. 31, 2018	Apr. 30, 2018
Statement of Stockholders' Equity [Abstract]
Stock dividends payable	$ 22	$ 20	$ 26	$ 7	$ 7
Dividends declared, per share	$ 0.125	$ 0.125	$ 0.15	$ 0.05	$ 0.05

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration