Goodwill Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 9,978,000	$ 1,745,000	$ 3,491,000
ATRM Holdings, Inc.
Goodwill [Line Items]
Goodwill	8,233,000
Goodwill, subsequent recognition	3,000
Diagnostic Services
Goodwill [Line Items]
Goodwill	1,745,000	1,745,000	2,393,000
Building and Construction
Goodwill [Line Items]
Goodwill	8,233,000	$ 0	$ 0
Disposal group, including discontinued operation, goodwill, noncurrent	$ 8,200,000

Amount classified as goodwill attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

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