Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Consolidated revenue	$ 30,353	$ 28,333	$ 81,552	$ 78,043
Consolidated gross profit	4,835	5,196	13,302	14,181
(Loss) income from operations by segment	(1,533)	(1,209)	(5,663)	(3,490)
Segment loss from operations	(1,533)	(151)	(5,663)	(1,432)
Merger and finance costs	0	(1,058)	0	(2,058)
Total depreciation and amortization	2,373	2,001	7,155	5,661
Diagnostic Services
Segment Reporting Information [Line Items]
Consolidated revenue	10,711	11,670	28,665	35,714
Total depreciation and amortization	280	333	917	942
Diagnostic Imaging
Segment Reporting Information [Line Items]
Consolidated revenue	2,048	3,351	7,242	8,923
Total depreciation and amortization	60	64	189	215
Mobile Healthcare
Segment Reporting Information [Line Items]
Consolidated revenue	9,035	10,575	26,534	30,669
Total depreciation and amortization	1,388	1,272	4,130	4,137
Building and Construction
Segment Reporting Information [Line Items]
Consolidated revenue	8,542	2,729	19,061	2,729
Total depreciation and amortization	580	124	1,723	124
Real Estate and Investments
Segment Reporting Information [Line Items]
Consolidated revenue	17	8	50	8
Total depreciation and amortization	65	208	196	243
Operating Segments | Diagnostic Services
Segment Reporting Information [Line Items]
Consolidated revenue	10,711	11,670	28,665	35,714
Consolidated gross profit	2,076	2,162	5,034	7,548
(Loss) income from operations by segment	1,424	1,304	2,904	4,914
Operating Segments | Diagnostic Imaging
Segment Reporting Information [Line Items]
Consolidated revenue	2,048	3,351	7,242	8,923
Consolidated gross profit	399	1,174	2,500	3,040
(Loss) income from operations by segment	138	755	1,592	1,662
Operating Segments | Mobile Healthcare
Segment Reporting Information [Line Items]
Consolidated revenue	9,035	10,575	26,534	30,669
Consolidated gross profit	1,155	1,441	3,205	3,351
(Loss) income from operations by segment	176	310	5	(357)
Operating Segments | Building and Construction
Segment Reporting Information [Line Items]
Consolidated revenue	8,542	2,729	19,061	2,729
Consolidated gross profit	1,253	477	2,709	477
(Loss) income from operations by segment	(496)	(125)	(2,445)	(125)
Operating Segments | Real Estate and Investments
Segment Reporting Information [Line Items]
Consolidated revenue	175	43	525	43
Consolidated gross profit	110	(23)	329	(200)
(Loss) income from operations by segment	93	(61)	209	(260)
Unallocated corporate and other expenses
Segment Reporting Information [Line Items]
(Loss) income from operations by segment	(2,710)	(2,299)	(7,453)	(7,231)
Corporate, eliminations and other
Segment Reporting Information [Line Items]
Consolidated revenue	(158)	(35)	(475)	(35)
Consolidated gross profit	(158)	(35)	(475)	(35)
(Loss) income from operations by segment	$ (158)	$ (35)	$ (475)	$ (35)