Recently Issued and Adopted Accounting Pronouncements	12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]
Recently Issued and Adopted Accounting Pronouncements	RECENTLY ISSUED AND ADOPTED ACCOUNTING PROUNOUNCEMENTS Recently Adopted In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Under the new guidance, modification accounting is only required if the fair value, vesting conditions or classification (equity or liability) of the new award are different from the original award immediately before the original award is modified. This update is effective for annual and interim financial statement periods beginning after December 15, 2017, with early adoption permitted. The new guidance must be applied prospectively to awards modified on or after the adoption date; consequently the impact will be dependent on whether the Company modifies any of its share-based payment awards and the nature of such modifications. There were no material impacts on the Company’s results based on the adoption of this update. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendments in this ASU simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test and eliminating the requirement for a reporting unit with a zero or negative carrying amount to perform a qualitative assessment. Instead, under this pronouncement, an entity would perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and would recognize an impairment change for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized is not to exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects will be considered, if applicable. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted and should be adopted on a prospective basis. The Company has adopted this ASU on a prospective basis in the second quarter of 2017. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The new guidance will require amounts generally described as restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments will be effective for the Company for fiscal years beginning after December 15, 2018. Early adoption is permitted. The Company has complied with this standard as of January 1, 2016. In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). Under ASU 2016-09, the tax effects of stock compensation will be recognized as income tax expense or benefit to the Company’s income statement and the tax effects of exercised or vested awards will be treated as discrete items in the reporting period in which they occur. Along with other income tax cash flows, excess tax benefits will be classified as operating activities, and cash paid by the Company when directly withholding shares for tax withholding purposes will be classified as financing activities. The Company has elected to account for forfeitures when they occur. This guidance was adopted on January 1, 2017, with no material impact to the Company’s consolidated financial statements. In November 2015, the Financial Accounting Standards Board issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. ASU 2015-17 was issued to simplify the presentation of deferred income taxes. The amendments in this guidance require that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. ASU 2015-17 is effective for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. As required, ATRM adopted this update effective January 1, 2017. There were no material impacts on the Company’s results based on the adoption of this update. In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which requires all inventory to be measured at the lower of cost and net realizable value, except for inventory that is accounted for using the LIFO or the retail inventory method, which will be measured under existing accounting standards. The new guidance must be applied on a prospective basis and was adopted on January 1, 2017 with no material impact on our consolidated financial statements. Recently Issued In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 requires lessees to recognize the assets and liabilities that arise from leases on the balance sheet. A lessee should recognize in its balance sheet a liability to make lease payments and an asset representing its right to use the underlying asset for the lease term. The new standard is effective for the company on January 1, 2019. The amendments should be applied at the beginning of the earliest period presented using a modified retrospective approach with earlier application permitted as of the beginning of an interim or annual reporting period. The Company will adopt the standard effective January 1, 2019 and has chosen to use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods prior to January 1, 2019. The new standard provides a number of optional practical expedients in transition. The Company has elected to apply the ‘package of practical expedients’ which allow us to not reassess i) whether existing or expired arrangements contain a lease, ii) the lease classification of existing or expired leases, or iii) whether previous initial direct costs would qualify for capitalization under the new lease standard. The Company has also elected to apply i) the practical expedient which allows us to not separate lease and non-lease components, and (2) the short-term lease exemption for all leases with an original term of less than 12 months, for purposes of applying the recognition and measurements requirements in the new standard. The Company expects that adoption of this standard will add an additional right to use asset of $1.0 million and an additional lease liability of $1.0 million The Company does not expect a material impact to the consolidated statement of operations or cash flows. Subsequent to the issuance of ASU 2016-02, the FASB issued ASUs 2018-01, Land Easement Practical Expedient for Transition to Topic 842. This ASU does not change the core principle of the guidance in ASU 2016-02, instead this amendment is intended to clarify and improve operability of certain topics included within the credit losses standard. This ASU will have the same effective date and transition requirements as ASU 2016-02. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). This standard will supersede the revenue recognition requirements in ASC 605, Revenue Recognition, and most industry-specific guidance. The standard requires an entity to recognize revenue in an amount that reflects the consideration to which the entity expects to receive in exchange for goods or services. In addition, during 2016, the FASB has issued ASU No. 2016-08, Principal versus Agent Considerations,” ASU No. 2016-10, “Identifying Performance Obligations and Licensing,” ASU No. 2016-12, “Narrow Scope Improvements and Practical Expedients,” and ASU No. 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers,” all of which clarify certain implementation guidance in ASU No. 2014-09. This standard along with the subsequent clarifications issued are effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years, making it effective for our fiscal year beginning January 1, 2018. Early adoption is permitted to the original effective date for annual reporting periods beginning after December 15, 2016. The Company has determined there will be no material changes to the consolidated financial statements with the exception of expanded disclosures on revenue to comply with the new ASU. The Company plans to use the modified retrospective method of adoption.

RECENTLY ISSUED AND ADOPTED ACCOUNTING PROUNOUNCEMENTS

Recently Adopted

In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Under the new guidance, modification accounting is only required if the fair value, vesting conditions or classification (equity or liability) of the new award are different from the original award immediately before the original award is modified. This update is effective for annual and interim financial statement periods beginning after December 15, 2017, with early adoption permitted. The new guidance must be applied prospectively to awards modified on or after the adoption date; consequently the impact will be dependent on whether the Company modifies any of its share-based payment awards and the nature of such modifications. There were no material impacts on the Company’s results based on the adoption of this update.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendments in this ASU simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test and eliminating the requirement for a reporting unit with a zero or negative carrying amount to perform a qualitative assessment. Instead, under this pronouncement, an entity would perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and would recognize an impairment change for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized is not to exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects will be considered, if applicable. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted and should be adopted on a prospective basis. The Company has adopted this ASU on a prospective basis in the second quarter of 2017.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The new guidance will require amounts generally described as restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments will be effective for the Company for fiscal years beginning after December 15, 2018. Early adoption is permitted. The Company has complied with this standard as of January 1, 2016.

In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). Under ASU 2016-09, the tax effects of stock compensation will be recognized as income tax expense or benefit to the Company’s income statement and the tax effects of exercised or vested awards will be treated as discrete items in the reporting period in which they occur. Along with other income tax cash flows, excess tax benefits will be classified as operating activities, and cash paid by the Company when directly withholding shares for tax withholding purposes will be classified as financing activities. The Company has elected to account for forfeitures when they occur. This guidance was adopted on January 1, 2017, with no material impact to the Company’s consolidated financial statements.

In November 2015, the Financial Accounting Standards Board issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. ASU 2015-17 was issued to simplify the presentation of deferred income taxes. The amendments in this guidance require that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. ASU 2015-17 is effective for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. As required, ATRM adopted this update effective January 1, 2017. There were no material impacts on the Company’s results based on the adoption of this update.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which requires all inventory to be measured at the lower of cost and net realizable value, except for inventory that is accounted for using the LIFO or the retail inventory method, which will be measured under existing accounting standards. The new guidance must be applied on a prospective basis and was adopted on January 1, 2017 with no material impact on our consolidated financial statements.

Recently Issued

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 requires lessees to recognize the assets and liabilities that arise from leases on the balance sheet. A lessee should recognize in its balance sheet a liability to make lease payments and an asset representing its right to use the underlying asset for the lease term. The new standard is effective for the company on January 1, 2019. The amendments should be applied at the beginning of the earliest period presented using a modified retrospective approach with earlier application permitted as of the beginning of an interim or annual reporting period. The Company will adopt the standard effective January 1, 2019 and has chosen to use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods prior to January 1, 2019. The new standard provides a number of optional practical expedients in transition. The Company has elected to apply the ‘package of practical expedients’ which allow us to not reassess i) whether existing or expired arrangements contain a lease, ii) the lease classification of existing or expired leases, or iii) whether previous initial direct costs would qualify for capitalization under the new lease standard. The Company has also elected to apply i) the practical expedient which allows us to not separate lease and non-lease components, and (2) the short-term lease exemption for all leases with an original term of less than 12 months, for purposes of applying the recognition and measurements requirements in the new standard. The Company expects that adoption of this standard will add an additional right to use asset of $1.0 million and an additional lease liability of $1.0 million The Company does not expect a material impact to the consolidated statement of operations or cash flows. Subsequent to the issuance of ASU 2016-02, the FASB issued ASUs 2018-01, Land Easement Practical Expedient for Transition to Topic 842. This ASU does not change the core principle of the guidance in ASU 2016-02, instead this amendment is intended to clarify and improve operability of certain topics included within the credit losses standard. This ASU will have the same effective date and transition requirements as ASU 2016-02.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). This standard will supersede the revenue recognition requirements in ASC 605, Revenue Recognition, and most industry-specific guidance. The standard requires an entity to recognize revenue in an amount that reflects the consideration to which the entity expects to receive in exchange for goods or services. In addition, during 2016, the FASB has issued ASU No. 2016-08, Principal versus Agent Considerations,” ASU No. 2016-10, “Identifying Performance Obligations and Licensing,” ASU No. 2016-12, “Narrow Scope Improvements and Practical Expedients,” and ASU No. 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers,” all of which clarify certain implementation guidance in ASU No. 2014-09. This standard along with the subsequent clarifications issued are effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years, making it effective for our fiscal year beginning January 1, 2018. Early adoption is permitted to the original effective date for annual reporting periods beginning after December 15, 2016. The Company has determined there will be no material changes to the consolidated financial statements with the exception of expanded disclosures on revenue to comply with the new ASU. The Company plans to use the modified retrospective method of adoption.