Merger - Summary of Recognized Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 10, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Deferred income taxes		$ 0
Goodwill	$ 9,978		$ 1,745	$ 3,491
ATRM Holdings, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents	0
Accounts receivable, net	2,831
Inventory, net	1,609
Other current assets	733
Property and equipment, net	840
Operating Lease Right-of-use assets, net	495
Accounts payable and other accrued liabilities	(10,851)
Debt and notes payable	(5,144)
Lease liability	(499)
Deferred income taxes	(265)
Net assets acquired (liabilities assumed)	(10,251)
Goodwill	8,233
Intangibles	19,470	19,470
Estimated purchase price	$ 17,452
Previously Reported | ATRM Holdings, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		0
Accounts receivable, net		2,831
Inventory, net		1,609
Other current assets		481
Property and equipment, net		840
Operating Lease Right-of-use assets, net		495
Accounts payable and other accrued liabilities		(10,851)
Debt and notes payable		(5,144)
Lease liability		(499)
Net assets acquired (liabilities assumed)		(10,238)
Goodwill		8,200
Intangibles		19,460
Estimated purchase price		17,452
Restatement Adjustment | ATRM Holdings, Inc.
Business Acquisition [Line Items]
Other current assets		252
Deferred income taxes		(265)
Net assets acquired (liabilities assumed)		(13)
Goodwill		3
Intangibles		10
Estimated purchase price		$ 0