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Related Party Transaction (Details)	Sep. 10, 2019 USD ($) $ / shares	Sep. 09, 2019 USD ($) $ / shares shares	Jul. 30, 2019 USD ($)	May 01, 2019 USD ($)	Apr. 03, 2019 USD ($)	Apr. 01, 2019 USD ($)	Mar. 27, 2019 USD ($)	Dec. 14, 2018 USD ($)	Jul. 27, 2015 USD ($) shares	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) shares	Mar. 29, 2019 USD ($)	Dec. 31, 2018 USD ($) shares	Dec. 17, 2018 USD ($)
Related Party Transaction [Line Items]
Equity securities											$ 26,000		$ 153,000
Common stock outstanding (in shares) \| shares											2,050,659		2,024,979
Preferred stock outstanding (in shares) \| shares											1,915,637
Consideration received		$ 3,000,000
Long-term debt											$ 22,994,000
Star Procurement, LLC
Related Party Transaction [Line Items]
Ownership percentage								50.00%
Payment to noncontrolling interests								$ 1,000,000
Board of Directors Chairman
Related Party Transaction [Line Items]
Guarantor obligations, maximum exposure, undiscounted												$ 1,500,000.0
Business acquisition share price (in per share) \| $ / shares		$ 10
Number of preferred stock shares acquired (in Shares) \| shares		100,000
Consideration transferred		$ 1,000,000
Board of Directors Chairman \| Digirad Corporation
Related Party Transaction [Line Items]
Percentage of outstanding shares		4.30%									4.30%
Preferred stock outstanding (in shares) \| shares											1,196,926
Board of Directors Chairman \| ATRM Holdings, Inc.
Related Party Transaction [Line Items]
Percentage of outstanding shares		17.40%
ATRM Holdings, Inc.
Related Party Transaction [Line Items]
Preferred stock, dividend rate percentage	10.00%
LSVM
Related Party Transaction [Line Items]
Payments to acquire businesses						$ 100.00
Series B Preferred Stock \| Lone Star Value Co-Invest I, LP \| ATRM Holdings, Inc.
Related Party Transaction [Line Items]
Common stock outstanding (in shares) \| shares		374,562
Series B Preferred Stock \| Lone Star Value Investors, LP \| ATRM Holdings, Inc.
Related Party Transaction [Line Items]
Common stock outstanding (in shares) \| shares		222,577									300,000
Series B Preferred Stock \| ATRM Holdings, Inc.
Related Party Transaction [Line Items]
Preferred stock, dividend rate percentage		10.00%
Perma Fix
Related Party Transaction [Line Items]
Investment made as part of subscription agreement									$ 1,000,000
Shares acquired (in shares) \| shares									71,429
Equity securities											$ 43,000
ATRM Holdings, Inc. \| Affiliated Entity
Related Party Transaction [Line Items]
Maximum allowable aggregate cash payments to subsidiary			$ 800,000	$ 400,000
Allowable subsequent incremental payments to subsidiary				$ 10,000
Promissory note								$ 300,000
Minimum \| ATRM Holdings, Inc. \| Affiliated Entity
Related Party Transaction [Line Items]
Promissory note, interest rate								10.00%
Maximum \| ATRM Holdings, Inc. \| Affiliated Entity
Related Party Transaction [Line Items]
Promissory note, interest rate								12.00%
Series A Preferred Stock
Related Party Transaction [Line Items]
Equity interests issued (per share)		0.03
ATRM Holdings, Inc.
Related Party Transaction [Line Items]
Business acquisition share price (in per share) \| $ / shares	$ 10.00
Consideration transferred	$ 17,452,000
ATRM Holdings, Inc. \| Series A Preferred Stock
Related Party Transaction [Line Items]
Equity interests issued (per share)	0.03
ATRM Holdings, Inc. \| Series B Preferred Stock
Related Party Transaction [Line Items]
Equity interests issued (per share)	2.5	2.5
Private Placement
Related Party Transaction [Line Items]
Stock Issued during period (in shares) \| shares		300,000
ATRM Unsecured Promissory Note, Due January 12, 2020
Related Party Transaction [Line Items]
Weighted average interest rate											12.00%		0.00%
ATRM Unsecured Promissory Note, Due January 12, 2020 \| Notes Payable, Other Payables \| Minimum
Related Party Transaction [Line Items]
Stated rate											10.00%
ATRM Unsecured Promissory Note, Due January 12, 2020 \| Notes Payable, Other Payables \| Maximum
Related Party Transaction [Line Items]
Weighted average interest rate											12.00%
ATRM Unsecured Promissory Note, Due June 1, 2020
Related Party Transaction [Line Items]
Weighted average interest rate											12.00%		0.00%
ATRM Unsecured Promissory Note, Due June 1, 2020 \| Notes Payable, Other Payables \| Minimum
Related Party Transaction [Line Items]
Stated rate											10.00%
ATRM Unsecured Promissory Note, Due June 1, 2020 \| Notes Payable, Other Payables \| Maximum
Related Party Transaction [Line Items]
Weighted average interest rate											12.00%
ATRM Unsecured Promissory Note, Due November 30, 2020
Related Party Transaction [Line Items]
Weighted average interest rate											12.00%		0.00%
ATRM Unsecured Promissory Note, Due November 30, 2020 \| Notes Payable, Other Payables \| Minimum
Related Party Transaction [Line Items]
Stated rate											10.00%
ATRM Unsecured Promissory Note, Due November 30, 2020 \| Notes Payable, Other Payables \| Maximum
Related Party Transaction [Line Items]
Weighted average interest rate											12.00%
Lone Star Value Management, Unsecured Promissory Note, Issued December 17, 2018 \| Notes Payable, Other Payables
Related Party Transaction [Line Items]
Debt instrument, face amount														$ 300,000
947 Waterford Road, LLC
Related Party Transaction [Line Items]
Sale leaseback transaction, gross proceeds					$ 1,000,000
Sale leaseback transaction, lease period					120 months
947 Waterford Road, LLC \| Minimum
Related Party Transaction [Line Items]
Amount due under financing arrangement					$ 1,200,000
947 Waterford Road, LLC \| Maximum
Related Party Transaction [Line Items]
Amount due under financing arrangement					1,300,000
300 Park Street, LLC
Related Party Transaction [Line Items]
Sale leaseback transaction, gross proceeds					$ 2,900,000
Sale leaseback transaction, lease period					120 months
300 Park Street, LLC \| Minimum
Related Party Transaction [Line Items]
Amount due under financing arrangement					$ 3,300,000
300 Park Street, LLC \| Maximum
Related Party Transaction [Line Items]
Amount due under financing arrangement					$ 3,600,000
Oxford Lease
Related Party Transaction [Line Items]
Sale leaseback transaction, gross proceeds							$ 1,200,000
Sale leaseback transaction, lease period							120 months
Oxford Lease \| Minimum
Related Party Transaction [Line Items]
Amount due under financing arrangement							$ 1,400,000
Oxford Lease \| Maximum
Related Party Transaction [Line Items]
Amount due under financing arrangement							$ 1,500,000
Subsequent Event \| Board of Directors Chairman
Related Party Transaction [Line Items]
Guarantor obligations, maximum exposure, undiscounted										$ 2,500,000.0