Segments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Consolidated revenue	$ 28,857	$ 23,912
Consolidated gross profit	4,441	3,981
(Loss) income from operations by segment	(2,604)	(1,135)
Consolidated loss from continuing operations	(2,604)	(1,135)
Total depreciation and amortization	2,407	1,809
Diagnostic Services
Segment Reporting Information [Line Items]
Consolidated revenue	10,814	11,726
Total depreciation and amortization	329	304
Diagnostic Imaging
Segment Reporting Information [Line Items]
Consolidated revenue	2,861	2,523
Total depreciation and amortization	63	78
Mobile Healthcare
Segment Reporting Information [Line Items]
Consolidated revenue	9,667	9,663
Total depreciation and amortization	1,378	1,427
Building and Construction
Segment Reporting Information [Line Items]
Consolidated revenue	5,484
Total depreciation and amortization	572	0
Real Estate and Investments
Segment Reporting Information [Line Items]
Consolidated revenue	31
Total depreciation and amortization	65	0
Operating Segments \| Diagnostic Services
Segment Reporting Information [Line Items]
Consolidated revenue	10,814	11,726
Consolidated gross profit	2,005	2,581
(Loss) income from operations by segment	1,024	1,736
Operating Segments \| Diagnostic Imaging
Segment Reporting Information [Line Items]
Consolidated revenue	2,861	2,523
Consolidated gross profit	869	786
(Loss) income from operations by segment	521	343
Operating Segments \| Mobile Healthcare
Segment Reporting Information [Line Items]
Consolidated revenue	9,667	9,663
Consolidated gross profit	1,198	614
(Loss) income from operations by segment	177	(623)
Operating Segments \| Building and Construction
Segment Reporting Information [Line Items]
Consolidated revenue	5,484	0
Consolidated gross profit	403	0
(Loss) income from operations by segment	(859)	0
Operating Segments \| Real Estate and Investments
Segment Reporting Information [Line Items]
Consolidated revenue	189	0
Consolidated gross profit	124	0
(Loss) income from operations by segment	106	0
Corporate And Reconciling Items
Segment Reporting Information [Line Items]
Consolidated revenue	(158)	0
Consolidated gross profit	(158)	0
(Loss) income from operations by segment	(158)	0
Segment Reconciling Items
Segment Reporting Information [Line Items]
(Loss) income from operations by segment	$ (3,415)	$ (2,591)

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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