Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent events (Details) - USD ($)	Feb. 13, 2020	Jan. 31, 2020	Jan. 31, 2019
Subsequent Event [Line Items]
Escrow deposit		$ 2,876,000	$ 2,689,000
Subsequent Event [Member] \| Westwood Plaza Purchase Agreement [Member]
Subsequent Event [Line Items]
Aggregate purchase price	$ 26,000,000
Escrow deposit	$ 1,000,000