Business Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Business segments (in thousands)

	Three Months ended						Six Months ended
	June 30,						June 30,
	2018			2017			2018			2017
Revenues:
Asset management	$	568			553			1,149			1,151
Mining royalty lands		2,055			1,833			3,827			3,595
Land development and construction		317			333			614			608
RiverFront on the Anacostia		2,613			—			5,038			—
		5,553			2,719			10,628			5,354
Operating profit (loss):
Before corporate expenses:
Asset management	$	258			238			507			522
Mining royalty lands		1,918			1,701			3,536			3,326
Land development and construction		(630	)		(383	)		(1,007	)		(778	)
RiverFront on the Anacostia		(293	)		—			(1,007	)		—
Operating profit before corporate expenses		1,253			1,556			2,029			3,070
Corporate expenses:
Allocated to asset management		(109	)		(27	)		(112	)		(91	)
Allocated to mining royalty lands		(52	)		(28	)		(129	)		(94	)
Allocated to land development and construction		(283	)		(217	)		(702	)		(725	)
Allocated to RiverFront on the Anacostia		(95	)		—			(237	)		—
Unallocated		(1,170	)		(294	)		(1,208	)		(983	)
Total corporate expenses		(1,709	)		(566	)		(2,388	)		(1,893	)
	$	(456	)		990			(359	)		1,177
Interest expense	$	807			—			1,650			—
Depreciation, depletion and amortization:
Asset management	$	129			128			260			260
Mining royalty lands		36			35			90			74
Land development and construction		57			110			114			165
RiverFront on the Anacostia		1,909			—			4,065			—
	$	2,131			273			4,529			499
Capital expenditures:
Asset management	$	6			4			167			31
Mining royalty lands		—			—			—			—
Land development and construction		1,018			482			1,310			1,707
RiverFront on the Anacostia		185			—			(58	)		—
	$	1,209			486			1,419			1,738

		June 30,	December 31,
Identifiable net assets		2018	2017
Asset management	$	10,594	2,960
Discontinued operations		2,210	176,694
Mining royalty lands		38,606	38,656
Land development and construction		45,017	46,684
Riverfront on the Anacostia		140,257	144,386
Cash items		311,422	4,524
Unallocated corporate assets		1,838	4,830
	$	549,944	418,734