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Segment Disclosures - Segment Reporting Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Gross revenue	$ 7,330	$ 5,680	$ 20,760	$ 15,899
Gross profit	1,634	621	4,736	1,830
Net income	423	(561)	1,591	(183)
Total assets	18,368		18,368		$ 19,933
Continued Operations
Segment Reporting Information [Line Items]
Total assets	18,368	15,915	18,368	15,915
Asset Management
Segment Reporting Information [Line Items]
Gross revenue	5,891	4,733	15,466	13,326
Gross profit	825	536	2,551	1,522
Net income	411	(353)	1,112	364
Asset Management | Continued Operations
Segment Reporting Information [Line Items]
Total assets	14,687	12,131	14,687	12,131
Real Estate Services
Segment Reporting Information [Line Items]
Gross revenue	1,439	947	5,294	2,573
Gross profit	809	85	2,185	308
Net income	12	(208)	479	(547)
Real Estate Services | Continued Operations
Segment Reporting Information [Line Items]
Total assets	$ 3,681	$ 3,784	$ 3,681	$ 3,784

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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