Core Molding (CMT) 10-K13 Mar 202019 FY Annual reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2019	Mar. 12, 2020	Jun. 28, 2019
Entity Information [Line Items]
Entity Small Business	true
Entity Registrant Name	CORE MOLDING TECHNOLOGIES INC.
Entity Central Index Key	0001026655
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 44,201,708
Entity Common Stock, Shares Outstanding		8,221,864

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
Consolidated Statements of Income - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Total sales	$ 284,290,000	$ 269,485,000	$ 161,673,000
Cost of Goods and Services Sold	262,784,000	242,344,000	137,042,000
Gross margin	21,506,000	27,141,000	24,631,000
Selling, General and Administrative Expense	28,934,000	27,838,000	16,690,000
Goodwill, Impairment Loss	4,100,000	2,403,000	0
Total General Expense	33,034,000	30,241,000	16,690,000
Operating Income (Loss)	(11,528,000)	(3,100,000)	7,941,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(94,000)	(48,000)	(49,000)
Net interest expense	4,144,000	2,394,000	245,000
Other Nonoperating Income (Expense)	(4,050,000)	(2,346,000)	(196,000)
Income (loss) before income taxes	(15,578,000)	(5,446,000)	7,745,000
Current Income Tax Expense (Benefit)	705,000	1,048,000	2,630,000
Deferred Income Tax Expense (Benefit)	(1,060,000)	(1,712,000)	(344,000)
Total income taxes	(355,000)	(664,000)	2,286,000
Net income (loss)	$ (15,223,000)	$ (4,782,000)	$ 5,459,000
Net income per common share:
Earnings Per Share, Basic	$ (1.94)	$ (0.62)	$ 0.71
Earnings Per Share, Diluted	$ (1.94)	$ (0.62)	$ 0.70
Weighted average shares outstanding:
Basic (in shares)	7,830,000	7,750,000	7,690,000
Diluted (in shares)	7,830,000	7,750,000	7,747,000

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
Consolidated Statements of Comprehensive Income - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (15,223,000)	$ (4,782,000)	$ 5,459,000
Other comprehensive income (loss):
Unrealized Gain on Foreign Currency Derivatives, before Tax	1,202,000	(452,000)	5,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(286,000)	87,000	(2,000)
Interest rate hedging derivatives:
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	641,000	65,000	0
Income tax benefit (expense)	(146,000)	(15,000)	0
Post retirement benefit plan adjustments:
Net actuarial (loss) gain	(985,000)	1,081,000	(268,000)
Prior service costs	(496,000)	(496,000)	(496,000)
Income tax benefit (expense)	313,000	(123,000)	255,000
Comprehensive income (loss)	$ (15,970,000)	$ (4,735,000)	$ 4,953,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,856,000	$ 1,891,000
Accounts receivable, net	32,424,000	45,468,000
Inventories:
Raw materials and components	13,041,000	17,278,000
Work in process	1,818,000	2,034,000
Finished goods	6,823,000	6,453,000
Total inventories, net	21,682,000	25,765,000
Contract with Customer, Asset, Net	888,000	3,915,000
Foreign sales tax receivable	2,627,000	1,789,000
Prepaid expenses and other current assets	1,748,000	1,474,000
Total current assets	61,225,000	80,302,000
Operating Lease, Right-of-Use Asset	4,484,000	0
Property, plant and equipment, net	79,206,000	80,657,000
Deferred Tax Assets, Net, Noncurrent	2,026,000	1,153,000
Goodwill	17,376,000	21,476,000
Intangible Assets, Net (Excluding Goodwill)	13,464,000	15,413,000
Other Assets, Noncurrent	1,525,000	2,197,000
Total Assets	179,306,000	201,198,000
Current liabilities:
Current portion of long-term debt	37,443,000	3,230,000
Line of Credit, Current	12,008,000	0
Accounts payable	19,910,000	25,450,000
Contract with Customer, Liability	3,698,000	1,686,000
Current portion of post retirement benefits liability	1,233,000	1,157,000
Accrued liabilities:
Compensation and related benefits	5,515,000	5,154,000
Other	4,027,000	3,514,000
Total current liabilities	83,834,000	40,191,000
Operating Lease, Liability, Noncurrent	3,119,000	0
Long-term Debt	0	37,784,000
Long-term Line of Credit	0	17,375,000
Post retirement benefits liability	7,927,000	6,919,000
Total Liabilities	94,880,000	102,269,000
Commitments and Contingencies	0	0
Stockholders’ Equity:
Preferred stock — $0.01 par value, authorized shares - 10,000,000; no shares outstanding at December 31, 2019 and December 31, 2018	0	0
Common stock — $0.01 par value, authorized shares - 20,000,000; outstanding shares: 7,877,945 at December 31, 2019 and 7,776,164 at December 31, 2018	79,000	78,000
Paid-in capital	34,772,000	33,208,000
Accumulated other comprehensive income, net of income taxes	1,370,000	2,117,000
Treasury stock — at cost, 3,806,355 shares at December 31, 2019 and 3,790,308 shares at December 31, 2018	(28,501,000)	(28,403,000)
Retained earnings	76,706,000	91,929,000
Total Stockholders’ Equity	84,426,000	98,929,000
Total Liabilities and Stockholders’ Equity	$ 179,306,000	$ 201,198,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity:
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares outstanding	7,877,945	7,776,164
Treasury Stock, Shares	3,806,355	3,790,308

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($)	Total	Common Stock Outstanding	Paid-In Capital	Accumulated Other Comprehensive Income	Treasury Stock	Retained Earnings
Balance at Dec. 31, 2016	$ (96,766,000)	$ (76,000)	$ (30,134,000)	$ (2,414,000)	$ 27,781,000	$ (91,923,000)
Balance (in shares) at Dec. 31, 2016		7,635,093
Change in Stockholders' Equity:
Net income (loss)	5,459,000					5,459,000
Dividends	(786,000)					(786,000)
Change in post retirement benefits, net of tax	509,000			509,000
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments	3,000			3,000
Purchase of treasury stock (in shares)		(19,533)
Purchase of treasury stock	(372,000)				(372,000)
Restricted stock issued (in shares)		95,717
Restricted stock issued	1,000
Share-based compensation	1,331,000		1,331,000
Balance (in shares) at Dec. 31, 2017		7,711,277
Balance (in shares) (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2017		7,711,277
Balance at Dec. 31, 2017	(101,893,000)	$ (77,000)	(31,465,000)	(2,070,000)	28,153,000	(96,434,000)
Balance (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2017	(102,962,000)	$ (77,000)	(31,465,000)	(2,070,000)	28,153,000	(97,503,000)
Change in Stockholders' Equity:
Cumulative Effect of New Accounting Principle in Period of Adoption	1,069,000					1,069,000
Net income (loss)	(4,782,000)					(4,782,000)
Dividends	(792,000)					(792,000)
Change in post retirement benefits, net of tax	462,000			(462,000)
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments	(365,000)			(365,000)
Change in interest rate swaps, net of tax	(50,000)			(50,000)
Purchase of treasury stock (in shares)		(17,180)
Purchase of treasury stock	(250,000)				250,000
Restricted stock issued (in shares)		82,067
Restricted stock issued	1,000	$ 1,000
Share-based compensation	1,743,000		1,743,000
Balance (in shares) at Dec. 31, 2018		7,776,164
Balance at Dec. 31, 2018	$ (98,929,000)	$ (78,000)	(33,208,000)	(2,117,000)	28,403,000	(91,929,000)
Change in Stockholders' Equity:
Common stock, shares outstanding	7,776,164
Net income (loss)	$ (15,223,000)					(15,223,000)
Change in post retirement benefits, net of tax	(1,168,000)			(1,168,000)
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments	916,000			916,000
Change in interest rate swaps, net of tax	(495,000)			(495,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0			162,000		(162,000)
Purchase of treasury stock (in shares)		(16,047)
Purchase of treasury stock	(98,000)				(98,000)
Restricted stock issued (in shares)		117,828
Restricted stock issued	1,000	$ 1,000
Share-based compensation	1,564,000		1,564,000
Balance (in shares) at Dec. 31, 2019		7,877,945
Balance at Dec. 31, 2019	$ (84,426,000)	$ (79,000)	$ (34,772,000)	$ (1,370,000)	$ 28,501,000	$ (76,706,000)
Change in Stockholders' Equity:
Common stock, shares outstanding	7,877,945

Consolidated Statement of Sto_2

Consolidated Statement of Stockholders' Equity (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Tax effect of change in post retirement benefits	$ 313,000	$ 123,000	$ 255,000
Unrealized Interest Rate Swap Gain (Loss), Tax	146,000	15,000	0
Tax effect of change in Foreign Currency Translation Adjustment	$ 286,000	$ 87,000	$ 2,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
Consolidated Statements of Cash Flows - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ (15,223,000)	$ (4,782,000)	$ 5,459,000
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	10,376,000	9,384,000	6,240,000
Deferred income taxes	(873,000)	(1,739,000)	(597,000)
Goodwill, Impairment Loss	4,100,000	2,403,000	0
Mark-to-market of interest rate swap	67,000	159,000	0
Share-based compensation	1,564,000	1,743,000	1,331,000
Foreign Currency Transaction Gain (Loss), before Tax	(33,000)	(5,000)	(8,000)
Change in operating assets and liabilities, net of effects of acquisition:
Accounts receivable	13,044,000	(17,945,000)	(295,000)
Inventories	4,083,000	(5,783,000)	(2,547,000)
Prepaid and other assets	2,587,000	(528,000)	(2,934,000)
Accounts payable	(4,849,000)	7,822,000	5,347,000
Accrued and other liabilities	3,420,000	3,122,000	(4,719,000)
Post retirement benefits liability	(1,628,000)	(389,000)	(381,000)
Net cash (used in) provided by operating activities	16,701,000	(6,528,000)	6,912,000
Cash flows from investing activities:
Purchase of property, plant and equipment	(7,460,000)	(5,801,000)	(4,259,000)
Business Combination, Purchase Price Allocated	0	(63,005,000)	0
Net cash used in investing activities	(7,460,000)	(68,806,000)	(4,259,000)
Cash flows from financing activities:
Proceeds from Lines of Credit	194,414,000	133,848,000	0
Gross repayment on revolving loans	(199,782,000)	(116,473,000)	0
Borrowing of Secured Debt Term Loan	0	45,000,000	0
Repayments of Secured Debt Term Loan	(3,375,000)	(10,125,000)	(3,000,000)
Payments of Loan Costs	(435,000)	(763,000)	0
Payments related to the purchase of treasury stock	(98,000)	(250,000)	(372,000)
Payments of Dividends	0	(792,000)	(786,000)
Net cash (used in) provided by financing activities	(9,276,000)	50,445,000	(4,158,000)
Net change in cash and cash equivalents	(35,000)	(24,889,000)	(1,505,000)
Cash and cash equivalents at beginning of year	1,891,000	26,780,000	28,285,000
Cash and cash equivalents at end of year	1,856,000	1,891,000	26,780,000
Cash paid for:
Interest (net of amounts capitalized)	3,869,000	2,261,000	247,000
Income taxes	1,284,000	1,033,000	2,411,000
Non Cash:
Fixed asset purchases in accounts payable	158,000	871,000	$ 278,000
Commitments For Capital Expenditures In Progress	$ 336,000	$ 3,461,000

Basis of Presentation

Basis of Presentation	12 Months Ended
Basis of Presentation	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Core Molding Technologies and its subsidiaries operate in the composites market as one operating segment as a molder of thermoplastic and thermoset structural products. The Company's operating segment consists of two component reporting units, Core Traditional and Horizon Plastics. The Company produces and sells molded products for varied markets, including medium and heavy-duty trucks, automobiles, marine, construction and other commercial markets. The Company offers customers a wide range of manufacturing processes to fit various program volume and investment requirements. These processes include compression molding of sheet molding compound ("SMC"), bulk molding compounds ("BMC"), resin transfer molding ("RTM"), liquid molding of dicyclopentadiene ("DCPD"), spray-up and hand-lay-up, glass mat thermoplastics ("GMT"), direct long-fiber thermoplastics ("D-LFT") and structural foam and structural web injection molding ("SIM"). As of December 31, 2019 , Core Molding Technologies has its headquarters in Columbus, Ohio, and operates seven production facilities in Columbus and Batavia, Ohio; Gaffney, South Carolina; Winona, Minnesota; Matamoros and Escobedo, Mexico; and Cobourg, Ontario, Canada. All produce structural composite products.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation - The accompanying consolidated financial statements include the accounts of all subsidiaries after elimination of all intercompany accounts, transactions, and profits. Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities, and reported amounts of revenues and expenses during the reporting period. Significant estimates relate to allowances for doubtful accounts, inventory reserves, self-insurance reserves related to healthcare and workers compensation, deferred taxes, post retirement benefits, progress billings for tooling, goodwill and long-lived assets. Actual results could differ from those estimates. Going Concern - Under FASB ASU 2014-15, “Presentation of Financial Statements - Going Concern,” management is required to evaluate conditions or events as related to uncertainties that raise substantial doubt about the Company’s ability to continue as a going concern and to provide related financial disclosures, as applicable. Our consolidated financial statements have been prepared on a going-concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. As further discussed in Note 10 - Debt , as of December 31, 2019, the Company was not in compliance with the fixed charge coverage ratio requirement under the Company's Amended and Restated Credit Agreement, dated January 16, 2018 (the “A/R Credit Agreement”), with KeyBank National Association as the administrative agent (the "Administrative Agent") and various other financial institutions thereto as lenders (the "Lenders"). On November 22, 2019, the Company entered into a forbearance agreement (the "Forbearance Agreement") with the Lenders. Pursuant to the Forbearance Agreement, the Borrowers and the Lenders acknowledged and confirmed that an event of default occurred under the A/R Credit Agreement resulting from the Borrowers failure to maintain the required Fixed Charge Coverage Ratio (as defined in the A/R Credit Agreement”) for the fiscal quarter ended September 30, 2019. The Forbearance Agreement provides that the Administrative Agent and Lenders shall forbear from the exercise of rights and remedies pursuant to the Loan Documents described in the A/R Credit Agreement through March 13, 2020, as long as the Company satisfies the conditions set forth in the Forbearance Agreement, including, (i) the Borrowers shall remain current on all loan payments during the forbearance period, (ii) on or before December 6, 2019, the Administrative Agent and Lenders shall each receive a copy of a report of Huron Consulting Group containing findings and observations in respect of the businesses and operations of the Company and the Borrowers shall deliver a strategic alternative assessment in respect of the Borrowers’ operations and financing, (iii) on or before December 15, 2019, the Administrative Agent and Lenders shall each receive a copy of appraisals of machinery and equipment and inventory appraisals, and the Borrowers shall have determined and proposed a new capital structure to the Administrative Agent and Lenders, (iv) on or before February 14, 2020, the Borrowers shall have obtained a definitive, written commitment from involved parties and/or lenders providing the basis for implementation of a new capital structure, and (v) on or before March 13, 2020, the Borrowers shall have closed on a new capital structure, acceptable to the Administrative Agents and Lenders. The Forbearance Agreement also implemented a new availability block with respect to the U.S. Revolving Loans portion of the A/R Credit Agreement, reducing availability from $32,500,000 to $28,000,000 and increasing the applicable margin for existing term and revolving loans, as well as increasing the commitment fees on any unused U.S. Revolving Loans. On March 13, 2020, the Company entered into the first Amendment to the Forbearance Agreement (the “Amended Forbearance Agreement”) with the Lenders. Pursuant to the terms of the Amended Forbearance Agreement, the Company and Lenders agreed to modify certain terms of the Forbearance Agreement and extend the Forbearance Agreement through May 29, 2020. The modifications include (1) a reduction in the U.S. Revolving Loan to $ 25,000,000 with an availability block of $ 5,000,000 which can be borrowed with the approval of the lenders, (2) a change of interest rate to LIBOR rate plus 650 basis points, (3) forebear compliance with the leverage covenant and fixed charge covenant through May 29, 2020, and (4) implementation of a capital expenditure spend limit of $ 3,500,000 from the effective date of the Amended Forbearance Agreement through May 29, 2020, (5) an increase in the commitment fees on any unused U.S. Revolving Loans. The Amended Forbearance Agreement provides that the Administrative Agent and Lenders shall forbear from the exercise of rights and remedies pursuant to the Loan Documents described in the Credit Agreement through May 29, 2020, as long as the Company satisfies the conditions set forth in the Amended Forbearance Agreement, including, (i) on or before March 31, 2020, the borrowers shall have obtained an executed term sheet from involved parties and/or lenders providing the basis for implementation of a new capital structure and defined due diligence parameters, (ii) on or before May 15, 2020 the Borrowers shall have obtained an executed definitive, written commitment from the New Lenders to enter into a definitive agreement to effect the refinancing, and (iii) on or before May 29, 2020, the borrowers shall have closed on a new capital structure. As a result of the Amended Forbearance Agreement not extending beyond a year, the Company’s remaining long-term debt under the A/R Credit Agreement, consisting of $49,451,000 in borrowings under the revolving credit commitment and the loan commitments, was classified as a current liability in the Company’s consolidated balance sheet as of December 31, 2019. As a result, the Company’s current liabilities exceeded its current assets by $22,609,000 as of December 31, 2019. If the Lenders were to call the loans or demand repayment of all existing borrowings, this could result in the Company being unable to meet its working capital obligations. The Company is evaluating several financing options to refinance some or all of the current obligations under the A/R Credit Agreement. The Company is considering financing options including an asset backed lending facility using the Company’s accounts receivable and inventories as security, term loans secured with the Company’s real estate and machinery and equipment, sale and leaseback of Company owned real estate and potential equity financing. The Company has obtained term sheets as a result of its marketing efforts and are evaluating alternatives. Any new financing remains subject to asset appraisals, field exams, financial projection due diligence, real estate environmental reviews, and other customary legal documentation. While the Company has executed an Amended Forbearance Agreement with existing Lenders, it can not guarantee that all conditions of the Amended Forbearance Agreement will be met, or predict if the Lenders will exercise their rights and remedies under the A/R Credit Agreement beyond the term of the Amended Forbearance Agreement. Additionally, since the Company has no firm commitments for additional financing, there can be no assurances that the Company will be able to secure additional financing on terms that are acceptable to the Company, or at all. As there can be no assurance that the Company will be able to successfully implement its refinancing plan, these conditions raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date the financial statements are issued. The Company's consolidated financial statements do not include adjustments, if any, that might arise from the outcome of this uncertainty. Management has been executing on its turnaround plan that started in December of 2018 and has been successful in improving equipment uptime, improving employee retention and reducing premium freight costs for expediting shipments to customers. While management believes these improvements have been successful and were the priority of the turnaround plan, operational efficiency improvements at the plants did not result in the level of financial improvements anticipated for 2019. Higher material usage and labor variances have impacted earnings and caused us to not meet forecasts established in the first quarter of 2019 when the Company entered into the First Amendment. Management remains focused on the operational turnaround and improving the financial performance of the Company in 2020. Management has, or is in the process of taking, the following actions to improve financial performance at its operating facilities: • Reorganized the Company’s leadership through the hiring of a new Chief Executive Officer, Executive Vice President of Operations, and Executive Vice President of Human Resources • Improved operational management team through hiring of new plant managers at several of our plants to provide stronger leadership • Developed specific action plans focused on reducing material usage and improving labor productivity • Implemented business and financial management systems to monitor performance by plant and drive improvement through timely identification of operational challenges • Engaged Huron Consulting Services to evaluate the Company’s turnaround financial projections, review with management various strategic alternatives that could result in a financing arrangement supported by projected future performance and serve as the Company’s financial adviser to work through modification or refinancing of the existing A/R Credit Agreement • Engaged a third party firm to appraise the Company’s assets in order to assess the financing capacity available from those assets • Implemented IATF certification process, which is a quality management system that provides for continual improvement, defect prevention and reduction of variation and waste in manufacturing processes. • Implemented inventory management systems to reduce stock outage events which cause downtime and labor inefficiency • Implemented customer price increases where margin on product was not meeting profitability targets, and evaluated relationships with major customers to assess ongoing profitability of those relationships • Reduced debt outstanding on the revolving line of credit by negotiating improved payment terms with significant customers • Established revised commercial terms with Volvo to allow for continued supply of product and rescinded the supply termination notification communicated to Volvo in November 2019 • Implemented cost saving measures and actions to align controllable spending and labor workforce to reduced sales volumes in the current truck market • Implementation of technical training programs specific to the Company’s products and processes • Improved free cash flow through reduction of working capital • Utilization of Kaizen techniques, process mapping and multi-functional problem solving teams to improve operational performance and reduce waste Revenue Recognition - The Company historically has recognized revenue from two streams, product revenue and tooling revenue. Product revenue is earned from the manufacture and sale of sheet molding compound and thermoset and thermoplastic products. Revenue from product sales is generally recognized as products are shipped, as the Company transfers control to the customer and is entitled to payment upon shipment. In certain circumstances, the Company recognizes revenue from product sales when products are produced and the customer takes control at our production facility. Tooling revenue is earned from manufacturing multiple tools, molds and assembly equipment as part of a tooling program for a customer. Given that the Company is providing a significant service of producing highly interdependent component parts of the tooling program, each tooling program consists of a single performance obligation to provide the customer the capability to produce a single product. Based on the arrangement with the customer, the Company recognizes revenue either at a point in time or over time. When the Company does not have an enforceable right to payment, the Company recognizes tooling revenue at a point in time. In such cases, the Company recognizes revenue upon customer acceptance, which is when the customer has legal title to the tools. The Company historically recognized all tooling revenue at a point in time, upon customer acceptance, before the adoption of ASU 2014-09. Certain tooling programs include an enforceable right to payment. In those cases, the Company recognizes revenue over time based on the extent of progress towards completion of its performance obligation. The Company uses a cost-to-cost measure of progress for such contracts because it best depicts the transfer of value to the customer and also correlates with the amount of consideration to which the entity expects to be entitled in exchange for transferring the promised goods or services to the customer. Under the cost-to-cost measure of progress, progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues are recorded proportionally as costs are incurred. Cash and Cash Equivalents - The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash is held primarily in two banks in 2 separate jurisdictions. The Company had $1,856,000 cash on hand at December 31, 2019 and had $1,891,000 on hand at December 31, 2018 . Accounts Receivable Allowances - Management maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. The Company has determined that a $ 50,000 allowance for doubtful accounts is needed at December 31, 2019 and $ 25,000 allowance was needed at December 31, 2018 . Management also records estimates for customer returns and deductions, discounts offered to customers, and for price adjustments. Should customer returns and deductions, discounts, and price adjustments fluctuate from the estimated amounts, additional allowances may be required. The Company had an allowance for estimated chargebacks of $ 476,000 at December 31, 2019 and $ 2,344,000 at December 31, 2018 . There have been no material changes in the methodology of these calculations. Inventories - Inventories, which include material, labor and manufacturing overhead, are valued at the lower of cost or net realizable value. The inventories are accounted for using the first-in, first-out (FIFO) method of determining inventory costs. Inventory quantities on-hand are regularly reviewed, and where necessary, provisions for excess and obsolete inventory are recorded based on historical and anticipated usage. The Company has recorded an allowance for slow moving and obsolete inventory of $898,000 at December 31, 2019 and $957,000 at December 31, 2018 . Contract Assets/Liabilities - Contract assets and liabilities represent the net cumulative customer billings, vendor payments and revenue recognized for tooling programs. For tooling programs where net revenue recognized and vendor payments exceed customer billings, the Company recognizes a contract asset. For tooling programs where net customer billings exceed revenue recognized and vendor payments, the Company recognizes a contract liability. Customer payment terms vary by contract and can range from progress payments based on work performed or one single payment once the contract is completed. Contract assets are generally classified as current. During the years ended December 31, 2019 and December 31, 2018, the Company recognized no impairments on contract assets. Contract liabilities are also generally classified as current. The Company recognized revenue related to contract liabilities. of $1,240,000 at December 31, 2019 and $449,000 at December 31, 2018 . Property, Plant, and Equipment - Property, plant, and equipment are recorded at cost. Depreciation is provided on a straight-line method over the estimated useful lives of the assets. The carrying amount of long‑lived assets is evaluated annually to determine if adjustment to the depreciation period or to the unamortized balance is warranted. Ranges of estimated useful lives for computing depreciation are as follows: Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Depreciation expense was $8,187,000 , $7,361,000 and $6,190,000 for the years ended December 31, 2019 , 2018 and 2017 , respectively. Long-Lived Assets - Long-lived assets consist primarily of property, plant and equipment and finite-lived intangibles. The Company acquired substantially all of the assets of Horizon Plastics on January 16, 2018, which resulted in approximately $ 16,770,000 of finite-lived intangibles and $ 12,994,000 of property, plant and equipment, all of which were recorded at fair value. The recoverability of long-lived assets is evaluated by an analysis of operating results and consideration of other significant events or changes in the business environment. The Company evaluates, whether impairment exists for long-lived assets on the basis of undiscounted expected future cash flows from operations before interest. There was no impairment of the Company's long-lived assets for the years ended December 31, 2019 , 2018 and 2017 . Goodwill - The purchase consideration of acquired businesses have been allocated to the assets and liabilities acquired based on the estimated fair values on the respective acquisition dates. Based on these values, the excess purchase consideration over the fair value of the net assets acquired was allocated to goodwill. The Company accounts for goodwill in accordance with FASB ASC Topic 350, Intangibles - Goodwill and Other. FASB ASC Topic 350 prohibits the amortization of goodwill and requires these assets be reviewed for impairment at each reporting unit. As a result of the Horizon Plastics acquisition on January 16, 2018 and the status of its integration, the Company established two reporting units, Core Traditional and Horizon Plastics. The annual impairment tests of goodwill may be completed through qualitative assessments, however the Company may elect to bypass the qualitative assessment and proceed directly to a quantitative impairment test for any reporting unit in any period. The Company may resume the qualitative assessment for any reporting unit in any subsequent period. Under a qualitative and quantitative approach, the impairment test for goodwill consists of an assessment of whether it is more-likely-than-not that a reporting unit’s fair value is less than its carrying amount. As part of the qualitative assessment, the Company considers relevant events and circumstances that affect the fair value or carrying amount of the Company. Such events and circumstances could include changes in economic conditions, industry and market conditions, cost factors, overall financial performance, reporting unit specific events and capital markets pricing. The Company places more weight on the events and circumstances that most affect the Company's fair value or carrying amount. These factors are all considered by management in reaching its conclusion about whether to perform step one of the impairment test. If the Company elects to bypass the qualitative assessment for any reporting unit, or if a qualitative assessment indicates it is more-likely-than-not that the estimated carrying value of a reporting unit exceeds its fair value, the Company proceeds to a quantitative approach. Due to the Company's financial performance and continued depressed stock price, the Company performed a quantitative analysis for both of its reporting units at September 30, 2019. During 2019, the Company incurred a loss of margin in its Horizon Plastics reporting unit caused by selling price decreases that the Company has not been able to fully offset with material cost reductions. As a result of the quantitative analysis, the Company concluded that the carrying value of Horizon Plastics was greater than the fair value, which resulted in a goodwill impairment charge of $4,100,000 at September 30, 2019 representing 19% of the goodwill related to the Horizon Plastics reporting unit. The company performed a qualitative assessment at December 31, 2019, indicating no additional goodwill impairment related to the Horizon Plastics reporting unit. The Company’s annual impairment assessment at December 31, 2018 consisted of a quantitative analysis for both reporting units. It concluded that the carrying value of Core Traditional was greater than the fair value, which resulted in a goodwill impairment charge of $2,403,000 , representing all the goodwill related to the Core Traditional reporting unit. The analysis of the Company’s other reporting unit, Horizon Plastics, indicated no goodwill impairment charge, based on historical performance and financial projections at that time, as the excess of the estimated fair value over the carrying value of its invested capital was approximately 23% of the book value of its net assets. There was no impairment of the Company's goodwill for the year ended December 2017 . Income Taxes - The Company records deferred income taxes for differences between the financial reporting basis and income tax basis of assets and liabilities. A detailed breakout is located in Note 12 - Income Taxes . Self-Insurance - The Company is self-insured with respect to Columbus and Batavia, Ohio, Gaffney, South Carolina, Winona, Minnesota and Brownsville, Texas for medical, dental and vision claims and Columbus and Batavia, Ohio for workers’ compensation claims, all of which are subject to stop-loss insurance thresholds. The Company is also self-insured for dental and vision with respect to its Cobourg, Canada location. The Company has recorded an estimated liability for self-insured medical, dental and vision claims incurred but not reported and worker’s compensation claims incurred but not reported at December 31, 2019 and December 31, 2018 of $ 1,203,000 and $ 960,000 , respectively. Post Retirement Benefits - Management records an accrual for post retirement costs associated with the health care plan sponsored by the Company for certain employees. Should actual results differ from the assumptions used to determine the reserves, additional provisions may be required. In particular, increases in future healthcare costs above the assumptions could have an adverse effect on the Company's operations. The effect of a change in healthcare costs is described in Note 13 - Post Retirement Benefits . Core Molding Technologies had a liability for post retirement healthcare benefits based on actuarially computed estimates of $ 9,160,000 at December 31, 2019 and $ 8,076,000 at December 31, 2018 . Fair Value of Financial Instruments - The Company's financial instruments consist of long-term debt, revolving loans, interest rate swaps, foreign currency hedges, accounts receivable, and accounts payable. The carrying amount of these financial instruments approximated their fair value. Further detail is located in Note 15 - Fair Value of Financial Instruments. Concentration Risks - The Company has concentration risk related to significant amounts of sales and accounts receivable with certain customers. The Company had four major customers during 2019 , Navistar, Volvo, PACCAR, and UFP. Major customers are defined as customers whose current year sales individually consist of more than ten percent of total sales during any annual or interim reporting period in the current year. Sales to four major customers comprised 62% , 65% and 65% of total sales in 2019 , 2018 and 2017 , respectively (see Note 4 - Major Customers ). Concentrations of accounts receivable balances with four customers accounted for 49% and 64% of accounts receivable at December 31, 2019 and 2018 , respectively. The Company performs ongoing credit evaluations of its customers' financial condition. The Company maintains reserves for potential bad debt losses, and such bad debt losses have been historically within the Company's expectations. Sales to all customers' manufacturing and service locations in Mexico and Canada totaled 34% , 32% and 36% of total sales for 2019 , 2018 and 2017 , respectively. As of December 31, 2019 , the Company employed a total of 1,821 employees, which consisted of 764 employees in its United States operations, 795 employees in its Mexican operations and 262 employees in its Canadian operation. Of these 1,821 employees, 341 are covered by a collective bargaining agreement with the International Association of Machinists and Aerospace Workers (“IAM”), which extends to August 7, 2022, and 635 are covered by a collective bargaining agreement with Sindicato de Jorneleros y Obreros, which extends to December 31, 2019. Additionally, 216 employees at the Company's Cobourg, Canada facility are covered by a collective bargaining agreement with United Food & Commercial Workers Canada ("UFCW"), which extends to November 1, 2021; and 35 employees at the Company's Escobedo, Mexico facility are covered by a collective bargaining agreement with Sindicato de trabajadores de la industria metalica y del comercio del estado de Nuevo Leon Presidente Benito Juarez Garcia C.T.M., which extends to February 1, 2020 and an extension is currently being negotiated. Earnings per Common Share - Basic earnings per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted earnings per common share are computed similarly but include the effect of the assumed exercise of dilutive stock options and vesting of restricted stock under the treasury stock method. A detailed computation of earnings per share is located in Note 3 - Net Income (Loss) per Common Share . Research and Development - Research and development activities focus on developing new material formulations, new products, new production capabilities and processes, and improving existing products and manufacturing processes. The Company does not maintain a separate research and development organization or facility, but uses its production equipment, as necessary, to support these efforts and cooperates with its customers and its suppliers in research and development efforts. Likewise, manpower to direct and advance research and development is integrated with the existing manufacturing, engineering, production, and quality organizations. Research and development costs, which are expensed as incurred, totaled approximately $1,171,000 , $1,032,000 and $848,000 in 2019 , 2018 and 2017 . Foreign Currency Adjustments - The functional currency for the Mexican and Canadian operations is the United States Dollar. All foreign currency asset and liability amounts are remeasured into United States Dollars at end-of-period exchange rates. Income statement accounts are translated at the weighted monthly average rates. Gains and losses resulting from translation of foreign currency financial statements into United States Dollars and gains and losses resulting from foreign currency transactions are included in current results of operations. Net foreign currency translation and transaction activity is included in selling, general and administrative expense. This activity resulted in a gain of $229,000 , $88,000 and $30,000 in 2019 , 2018 and 2017 , respectively. Recent Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842). This update requires organizations to recognize lease assets and lease liabilities on the balance sheet and also disclose key information about leasing arrangements. This ASU is effective for annual reporting periods beginning on or after December 15, 2018, and interim periods within those annual periods. Earlier application is permitted for all entities as of the beginning of an interim or annual period. In accordance with ASU 2016-02, the Company elected not to recognize lease assets and lease liabilities for leases with a term of twelve months or less. The ASU requires a modified retrospective transition method, or a transition method option further described within ASU 2018-11, with the option to elect a package of practical expedients that permits the Company to: (1) not reassess whether expired or existing contracts contain leases, (2) not reassess lease classification for existing or expired leases and (3) not consider whether previously capitalized initial direct costs would be appropriate under the new standard. The Company elected to apply the package of practical expedients. The Company adopted ASU No. 2016-02 as of January 1, 2019, using the modified retrospective approach. The modified retrospective approach provides a method for recording existing leases at adoption without restating previously reported periods. In addition, the Company elected the practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. In addition, the Company elected the practical expedient to determine the lease term for existing leases. In the application of practical expedient, the Company evaluated the buildings leased and the current financial performance of the plant associated, which resulted in the determination that most renewal options would be reasonably certain in determining the expected lease term. Adoption of the new standard resulted in the recording of additional net right of use assets and lease liabilities of $4,490,000 and $4,428,000 , respectively, as of January 1, 2019. The present value of lease liabilities has been measured using the Company’s revolving loan borrowing rates as of December 31, 2018 (one day prior to initial application). Additionally, ROU assets for these operating leases have been measured as the initial measurement of applicable lease liabilities adjusted for any unamortized initial prepaid/accrued rent and any ASC Topic 420 liabilities. The standard did not materially impact the Company's consolidated statement of income (loss) or statement of cash flows. Current expected credit loss (CECL) In June 2016, the FASB issued ASU 2016-13, “Financial Instruments-Credit Losses,” which changes the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities will be required to use a new forward-looking “expected loss” model that will replace today’s “incurred loss” model and generally will result in the earlier recognition of allowances for losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to current practice, except that the losses will be recognized as an allowance. Subsequent to issuing ASU 2016-13, the FASB issued ASU 2018-19, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses,” for the purpose of clarifying certain aspects of ASU 2016-13. ASU 2018-19 has the same effective date and transition requirements as ASU 2016-13. In April 2019, the FASB issued ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments,” which is effective with the adoption of ASU 2016-13. In May 2019, the FASB issued ASU 2019-05, “Financial Instruments - Credit Losses (Topic 326),” which is also effective with the adoption of ASU 2016-13. In October 2019, the FASB voted to delay the implementation date for certain companies, including those that qualify as a smaller reporting company under SEC rules, until January 1, 2023, with revised ASU’s

Net Income per Common Share

Net Income per Common Share	12 Months Ended
Net Income per Common Share	Dec. 31, 2019
Earnings Per Share [Abstract]
Net Income per Common Share	Net Income (Loss) per Common Share Net income (loss) per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted net income (loss) per common share is computed similarly but includes the effect of the assumed exercise of dilutive stock options and restricted stock under the treasury stock method. The Company's restricted shares are entitled to receive dividends and voting rights applicable to the Company's common stock, irrespective of any vesting requirement. Accordingly, the restricted shares are considered a participating security and the Company is required to apply the two-class method to consider the impact of the restricted shares on the calculation of basic and diluted earnings per share. The Company is currently in a net loss position and is therefore not required to present the two-class method; however, in the event the Company is in a net income position, the two-class method must be applied by allocating all earnings during the period to common shares and restricted shares. The computation of basic and diluted net income (loss) per common share is as follows: December 31, 2019 2018 2017 Net income (loss) $ (15,223,000 ) $ (4,782,000 ) $ 5,459,000 Weighted average common shares outstanding — basic 7,830,000 7,750,000 7,690,000 Effect of dilutive securities — — 57,000 Weighted average common and potentially issuable common shares outstanding — diluted 7,830,000 7,750,000 7,747,000 Basic net income (loss) per common share $ (1.94 ) $ (0.62 ) $ 0.71 Diluted net income (loss) per common share $ (1.94 ) $ (0.62 ) $ 0.70

Major Customers

Major Customers	12 Months Ended
Major Customers	Dec. 31, 2019
Revenues [Abstract]
Major Customers	Major Customers The Company had four major customers during 2019 , Navistar, Volvo, PACCAR, and UFP. Major customers are defined as customers whose current year sales individually consist of more than ten percent of total sales during any annual or interim reporting period in the current year. The loss of a significant portion of sales to Navistar, Volvo, PACCAR, or UFP would have a material adverse effect on the business of the Company. The following table presents sales revenue for the above-mentioned customers for the years ended December 31: 2019 2018 2017 Navistar product sales $ 54,798,000 $ 52,347,000 $ 39,609,000 Navistar tooling sales 2,084,000 2,806,000 159,000 Total Navistar sales 56,882,000 55,153,000 39,768,000 Volvo product sales 48,487,000 46,063,000 27,627,000 Volvo tooling sales 262,000 97,000 8,089,000 Total Volvo sales 48,749,000 46,160,000 35,716,000 PACCAR product sales 44,543,000 38,027,000 26,481,000 PACCAR tooling sales 1,525,000 6,425,000 2,932,000 Total PACCAR sales 46,068,000 44,452,000 29,413,000 UFP product sales 25,395,000 27,906,000 — UFP tooling sales — 240,000 — Total UFP sales 25,395,000 28,146,000 — Other product sales 95,764,000 91,874,000 54,906,000 Other tooling sales 11,432,000 3,700,000 1,870,000 Total other sales 107,196,000 95,574,000 56,776,000 Total product sales 268,987,000 256,217,000 148,623,000 Total tooling sales 15,303,000 13,268,000 13,050,000 Total sales $ 284,290,000 $ 269,485,000 $ 161,673,000

Foreign Operations

Foreign Operations	12 Months Ended
Foreign Operations	Dec. 31, 2019
Segment Reporting [Abstract]
Foreign Operations	Foreign Operations Primarily all of the Company's product is sold to U.S. based customers in U.S. dollars. The following table provides information related to sales by country, based on the ship to location of customers' production facilities, for the years ended December 31: 2019 2018 2017 United States $ 178,953,000 $ 181,207,000 $ 103,513,000 Mexico 79,761,000 74,029,000 52,496,000 Canada 16,988,000 12,494,000 5,664,000 Other 8,588,000 1,755,000 — Total $ 284,290,000 $ 269,485,000 $ 161,673,000 The following table provides information related to the location of property, plant and equipment, net, as of December 31: 2019 2018 United States $ 39,132,000 $ 37,778,000 Mexico 31,865,000 34,155,000 Canada 8,209,000 8,724,000 Total $ 79,206,000 $ 80,657,000

Property, Plant & Equipment

Property, Plant & Equipment	12 Months Ended
Property, Plant & Equipment	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Plant & Equipment	Property, Plant, and Equipment Property, plant, and equipment consisted of the following at December 31: 2019 2018 Land and land improvements $ 6,009,000 $ 6,009,000 Buildings 43,375,000 43,042,000 Machinery and equipment 118,366,000 108,661,000 Tools, dies, and patterns 1,516,000 1,419,000 Additions in progress 1,615,000 5,014,000 Total 170,881,000 164,145,000 Less accumulated depreciation (91,675,000 ) (83,488,000 ) Property, plant and equipment, net $ 79,206,000 $ 80,657,000 Additions in progress at December 31, 2019 and 2018 relate to building improvements and equipment purchases that were not yet completed and placed in service at year end. At December 31, 2019 , commitments for capital expenditures in progress were $336,000 and included $158,000 recorded on the balance sheet in accounts payable. At December 31, 2018 , commitments for capital expenditures in progress were $3,461,000 , and included $871,000 recorded on the balance sheet in accounts payable.

Leases (Notes)

Leases (Notes)	12 Months Ended
Leases (Notes)	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Leases [Text Block]	Leases The Company has operating leases with fixed payment terms primarily associated with buildings and warehouses. The Company's leases have remaining lease terms of less than two years to five years, some of which include options to extend the lease for six years. Operating leases are included in operating lease right-of-use ("ROU") assets and operating lease liabilities on the Consolidated Balance Sheets. ROU assets represent the right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. The Company used the applicable incremental borrowing rate at implementation date to measure lease liabilities and ROU assets. The incremental borrowing rate used by the Company was based on baseline rates and adjusted by the credit spreads commensurate with the Company’s secured borrowing rate. At each reporting period when there is a new lease initiated, the Company will utilize its incremental borrowing rate to perform lease classification tests on lease components and to measure ROU assets and lease liabilities. The components of lease expense were as follows: December 31, 2019 Operating lease cost $ 1,430,000 Total net lease cost $ 1,430,000 Other supplemental balance sheet information related to leases was as follows: December 31, 2019 Operating lease: Current operating lease right of use assets $ — Noncurrent operating lease right of use assets 4,484,000 Total operating lease right of use assets $ 4,484,000 December 31, 2019 Current operating lease liabilities (A) $ 1,304,000 Noncurrent operating lease liabilities 3,119,000 Total operating lease liabilities $ 4,423,000 Weighted average remaining lease term (in years): Operating leases 4.0 Weighted average discount rate: Operating lease 4.9 % (A) Current operating lease liability included in "Other Accrued Liabilities" on the Consolidated Balance Sheet. Other information related to leases were as follows: December 31, 2019 Cash Paid for amounts included in the measurement of lease liabilities Operating cash flow from operating leases (B) $ 1,455,000 (B) Cash flow from operating lease included in "Prepaid and other assets" on the Consolidated Statements of Cash Flows. As of December 31, 2019, maturities of lease liabilities were as follows: Operating Leases 2020 $ 1,433,000 2021 1,174,000 2022 1,102,000 2023 1,000,000 2024 530,000 Total lease payments 5,239,000 Less:imputed interest (816,000 ) Total lease obligations 4,423,000 Less:current obligations (1,304,000 ) Long-term lease obligations $ 3,119,000 As of December 31, 2018, maturities of lease liabilities were as follows: Operating Leases 2019 $ 1,291,000 2020 1,099,000 2021 838,000 2022 766,000 2023 661,000 2024 and Thereafter 331,000 Total minimum lease payments $ 4,986,000

Business Combination (Notes)

Business Combination (Notes)	12 Months Ended
Business Combination (Notes)	Dec. 31, 2018
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Horizon Plastics Acquisition On January 16, 2018, 1137925 B.C Ltd., subsequently renamed Horizon Plastics International Inc., a wholly owned subsidiary of the Company, entered into an Asset Purchase Agreement (the "Agreement") with Horizon Plastics International Inc., 1541689 Ontario Inc., 2551024 Ontario Inc. and Horizon Plastics de Mexico, S.A. de C.V. (collectively "Horizon Plastics"). Pursuant to the terms of the Agreement the Company acquired substantially all of the assets and assumed certain specified liabilities of Horizon Plastics for a cash purchase of $62,457,000 . The purchase price was subject to working capital adjustments resulting in an increase in the purchase price of $548,000 . The acquisition was funded through a combination of cash on hand and borrowings under the Amended and Restated Credit Agreement ("A/R Credit Agreement"), further described in Note 10 - Debt , entered into with KeyBank National Association as Administrative Agent and various other financial institutions on January 16, 2018. The purpose of the acquisition was to increase the Company's structural composite process capabilities to include structural foam and structural web molding, expand its geographical footprint, and diversify the Company's customer base. Consideration was allocated to assets acquired and liabilities assumed based on their fair values as of the acquisition date as follows: Accounts Receivable $ 7,677,000 Inventory 6,523,000 Other Current Assets 832,000 Property and Equipment 12,994,000 Intangibles 16,770,000 Goodwill 21,476,000 Accounts Payable (3,181,000 ) Other Current Liabilities (86,000 ) $ 63,005,000 The purchase price included consideration for strategic benefits, including an assembled workforce, operational infrastructure and synergistic revenue opportunities, which resulted in the recognition of goodwill. The goodwill is deductible for income tax purposes. The company incurred $1,289,000 and $596,000 of expense in 2018 and 2017, respectively, associated with the acquisition, which is recorded in selling, general and administrative expense. The amount allocated to intangible assets has been attributed to the following categories and will be amortized over the useful lives of each individual asset identified on a straight-line basis as follows: Acquired Intangible Assets Estimated Fair Value Estimated Useful Life (Years) Non-competition Agreement $ 1,810,000 5 Trademarks 1,610,000 10 Developed Technology 4,420,000 7 Customer Relationships 8,930,000 12 Total $ 16,770,000 Pro Forma Information The unaudited pro forma information for the combined results of the Company has been prepared as if the 2018 acquisitions had taken place on January 1, 2017. The unaudited pro forma information is not necessarily indicative of the results that we would have achieved had the transactions actually taken place on January 1, 2017 and the unaudited pro forma information does not purport to be indicative of future financial operating results. Pro forma for the year ended December 31, 2018 2017 Net revenue $ 272,153,000 $ 222,015,000 Net income (loss) (3,788,000 ) 8,121,000 Net income (loss) per common share: Basic (0.49 ) 1.06 Diluted (0.49 ) 1.05 The unaudited pro forma net income includes the following adjustments that would have been recorded had the 2018 acquisition taken place on January 1, 2017. Pro forma for the year ended December 31, 2018 2017 Depreciation expense $ 55,000 $ 50,000 Amortization expense 78,000 1,876,000 Interest (income) expense (208,000 ) 1,705,000 Non-recurring transaction costs (1,289,000 ) (596,000 ) Income tax expense (benefit) 253,000 (880,000 )

Goodwill and Intangible Asset D

Goodwill and Intangible Asset Disclosure (Notes)	12 Months Ended
Goodwill and Intangible Asset Disclosure (Notes)	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	Goodwill and Intangibles Goodwill activity for the year ended December 31, 2019 and December 31, 2018 consisted of the following: 2019 2018 Balance at beginning of year $ 21,476,000 $ 2,403,000 Additions — 21,476,000 Impairment (4,100,000 ) (2,403,000 ) Balance at end of year $ 17,376,000 $ 21,476,000 Due to the Company's financial performance and continued depressed stock price, the Company performed a quantitative analysis for both of its reporting units at September 30, 2019. During 2019, the Company incurred a decrease in margin in its Horizon Plastics reporting unit caused by selling price decreases that the Company has not yet been able to fully offset with material cost reductions. As a result of the quantitative analysis, the Company concluded that the carrying value of Horizon Plastics was greater than the fair value, which resulted in a goodwill impairment charge of $ 4,100,000 at September 30, 2019 representing 19% of the goodwill related to the Horizon Plastics reporting unit. The company performed a qualitative assessment at December 31, 2019, indicating no additional goodwill impairment related to the Horizon Plastics reporting unit. The Company’s annual impairment assessment at December 31, 2018 consisted of a quantitative analysis for both the Core Traditional and Horizon Plastics reporting units. It concluded that the carrying value of Core Traditional was greater than the fair value, which resulted in a goodwill impairment charge of $2,403,000 . The analysis of the Company’s other reporting unit, Horizon Plastics, indicated no goodwill impairment charge as the excess of the estimated fair value over the carrying value of its invested capital was approximately 23% of the book value of its net assets. Intangible assets at December 31, 2019 were comprised of the following: Definite-lived Intangible Assets Amortization Period Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade Name 25 Years $ 250,000 $ (48,000 ) $ 202,000 Trademarks 10 Years 1,610,000 (315,000 ) 1,295,000 Non-competition Agreement 5 Years 1,810,000 (709,000 ) 1,101,000 Developed Technology 7 Years 4,420,000 (1,237,000 ) 3,183,000 Customer Relationships 10-12 Years 9,330,000 (1,647,000 ) 7,683,000 Total $ 17,420,000 $ (3,956,000 ) $ 13,464,000 Intangible assets at December 31, 2018 were comprised of the following: Definite-lived Intangible Assets Amortization Period Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade Name 25 Years $ 250,000 $ (38,000 ) $ 212,000 Trademarks 10 Years 1,610,000 (154,000 ) 1,456,000 Non-competition Agreement 5 Years 1,810,000 (347,000 ) 1,463,000 Developed Technology 7 Years 4,420,000 (605,000 ) 3,815,000 Customer Relationships 10-12 Years 9,330,000 (863,000 ) 8,467,000 Total $ 17,420,000 $ (2,007,000 ) $ 15,413,000 The aggregate intangible asset amortization expense was $ 1,949,000 for the year ended December 31, 2019 and amortization expense is expected to be same each year through the year ended December 31, 2022 and $1,587,000 for the year ended December 31, 2023. The Company incurred $1,869,000 and $50,000 amortization expense for the years ended December 31, 2018 and 2017, respectively. As of December 31, 2019, future intangible amortization were as follows: Amortization Expense 2020 $ 1,949,000 2021 1,949,000 2022 1,949,000 2023 1,602,000 2024 1,587,000 2025 and thereafter 4,428,000 Total intangibles as of December 31, 2019 13,464,000

Debt

Debt	12 Months Ended
Debt	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	Debt Long-term debt consists of the following at: December 31, December 31, Term loans payable, interest at a variable rate (6.30% and 4.34% at December 31, 2019 and 2018, respectively) with monthly payments of interest and quarterly payments of principal through January 2023. $ 38,250,000 $ 41,625,000 Revolving loans, interest at a variable rate (6.04% and 4.39% at December 31, 2019 and 2018, respectively) 12,008,000 17,375,000 Total 50,258,000 59,000,000 Less deferred loan costs (807,000 ) (611,000 ) Less current portion (49,451,000 ) (3,230,000 ) Long-term debt $ — $ 55,159,000 Credit Agreement On January 16, 2018, the Company entered into an Amended and Restated Credit Agreement ("A/R Credit Agreement") with KeyBank National Association as administrative agent (the "Administrative Agent") and various financial institutions party thereto as lenders (the "Lenders"). Pursuant to the terms of the A/R Credit Agreement (i) the Company may borrow revolving loans in the aggregate principal amount of up to $40,000,000 (the “U.S. Revolving Loans”) from the Lenders and term loans in the aggregate principal amount of up to $32,000,000 from the Lenders, (ii) the Company's wholly-owned subsidiary, Horizon Plastics International, Inc., (the "Subsidiary") may borrow revolving loans in an aggregate principal amount of up to $10,000,000 from the Lenders (which revolving loans shall reduce the availability of the U.S. Revolving Loans to the Company on a dollar-for-dollar basis) and term loans in an aggregate principal amount of up to $13,000,000 from the Lenders, (iii) the Company obtained a Letter of Credit Commitment of $250,000 , of which $160,000 has been issued and (iv) the Company repaid the outstanding term loan balance of $6,750,000 . The A/R Credit Agreement is secured by a guarantee of each U.S. and Canadian subsidiary of the Company, and by a lien on substantially all of the present and future assets of the Company and its U.S. and Canadian subsidiaries, except that only 65% of the stock issued by Corecomposites de Mexico, S. de R.L. de C.V. has been pledged. Concurrent with the closing of the A/R Credit Agreement the Company borrowed the $32,000,000 term loan and $2,000,000 from the U.S. Revolving loan and the Subsidiary borrowed the $13,000,000 term loan and $2,500,000 from revolving loans to provide $49,500,000 of funding for the acquisition of Horizon Plastics. On March 14, 2019, the Company entered into the first amendment (“First Amendment”) to the A/R Credit Agreement with the Lenders. Pursuant to the terms of the First Amendment, the Company and Lenders agreed to modify certain terms of the A/R Credit Agreement. These modifications included (1) implementation of an availability block on the U.S. Revolving Loans reducing availability from $40,000,000 to $32,500,000 , (2) modification to the definition of EBITDA to add back certain one-time expenses, (3) waiver of non-compliance with the leverage covenant as of December 31, 2018 and modification of the leverage ratio definition and covenant to eliminate testing of the leverage ratio until December 31, 2019, (4) waiver of non-compliance with the fixed charge covenant as of December 31, 2018 and modification of the fixed charge coverage ratio definition and covenant requirement, (5) implementation of a capital expenditure spend limit of $7,500,000 during the first six months of 2019 and $12,500,000 for the full year 2019, (6) an increase of the applicable interest margin spread for existing term and revolving loans, and (7) an increase in the commitment fees on any unused U.S. Revolving Loans. On November 22, 2019, the Company entered into a forbearance agreement (the "Forbearance Agreement") with the Lenders. Pursuant to the Forbearance Agreement, the Borrowers and the Lenders acknowledged and confirmed that an event of default occurred under the A/R Credit Agreement resulting from the Borrowers failure to maintain the required Fixed Charge Coverage Ratio (as defined in the A/R Credit Agreement”) for the fiscal quarter ended September 30, 2019. The Forbearance Agreement provides that the Administrative Agent and Lenders shall forbear from the exercise of rights and remedies pursuant to the Loan Documents described in the A/R Credit Agreement through March 13, 2020, as long as the Company satisfies the conditions set forth in the Forbearance Agreement, including, (i) the Borrowers shall remain current on all loan payments during the forbearance period, (ii) on or before December 6, 2019, the Administrative Agent and Lenders shall each receive a copy of a report of Huron Consulting Group containing findings and observations in respect of the businesses and operations of the Company and the Borrowers shall deliver a strategic alternative assessment in respect of the Borrowers’ operations and financing, (iii) on or before December 15, 2019, the Administrative Agent and Lenders shall each receive a copy of appraisals of machinery and equipment and inventory appraisals, and the Borrowers shall have determined and proposed a new capital structure to the Administrative Agent and Lenders, (iv) on or before February 14, 2020, the Borrowers shall have obtained a definitive, written commitment from involved parties and/or lenders providing the basis for implementation of a new capital structure, and (v) on or before March 13, 2020, the Borrowers shall have closed on a new capital structure, acceptable to the Administrative Agents and Lenders. The Forbearance Agreement also implemented a new availability block with respect to the U.S. Revolving Loans portion of the A/R Credit Agreement, reducing availability from $32,500,000 to $28,000,000 and increasing the applicable margin for existing term and revolving loans, as well as increasing the commitment fees on any unused U.S. Revolving Loans. On March 13, 2020, the Company entered into the first Amendment to the Forbearance Agreement (the “Amended Forbearance Agreement”) with the Lenders. Pursuant to the terms of the Amended Forbearance Agreement, the Company and Lenders agreed to modify certain terms of the Forbearance Agreement and extend the Forbearance Agreement through May 29, 2020. The modifications include (1) a reduction in the U.S. Revolving Loan to $25,000,000 with an availability block of $5,000,000 which can be borrowed with the approval of the lenders, (2) a change of interest rate to LIBOR rate plus 650 basis points, (3) forebear compliance with the leverage covenant and fixed charge covenant through May 29,2020, and (4) implementation of a capital expenditure spend limit of $3,500,000 from the effective date of the Amended Forbearance Agreement through May 29, 2020. The Amended Forbearance Agreement provides that the Administrative Agent and Lenders shall forbear from the exercise of rights and remedies pursuant to the Loan Documents described in the Credit Agreement through May 29, 2020, as long as the Company satisfies the conditions set forth in the Amended Forbearance Agreement, including, (i) on or before March 31, 2020, the borrowers shall have obtained an executed term sheet from involved parties and/or lenders providing the basis for implementation of a new capital structure and defined due diligence parameters, (ii) on or before May 15, 2020 the Borrowers shall have obtained an executed definitive, written commitment from the New Lenders to enter into a definitive agreement to effect the refinancing, and (iii) on or before May 29, 2020, the borrowers shall have closed on a new capital structure. As a result of the Amended Forbearance Agreement not extending beyond a year, the Company’s remaining long-term debt under the A/R Credit Agreement, consisting of $49,451,000 in borrowings under the revolving credit commitment and the loan commitments, was classified as a current liability in the Company’s consolidated balance sheet as of December 31, 2019. As a result, the Company’s current liabilities exceeded its current assets by $22,609,000 as of December 31, 2019. If the Lenders were to call the loans or demand repayment of all existing borrowings, this could result in the Company being unable to meet its working capital obligations. Term Loans The $45,000,000 Term Loans were used to finance the acquisition of Horizon Plastics. This commitment has fixed quarterly principal payments payable over a five -year period. Borrowings made pursuant to these loans bear interest, payable monthly at 30 day LIBOR plus a basis point margin spread from 225 to 450 based on the Company's leverage ratio and was set at 450 basis points as of December 31, 2019 . Revolving Loans The Company has available $28,000,000 of variable rate revolving loans of which $ 12,008,000 is outstanding as of December 31, 2019 . These revolving loans are scheduled to mature in January 2023, and are classified as current on the balance sheet. Borrowings made on the revolving loans bear interest, payable monthly at 30 day LIBOR plus a basis point margin spread from 225 to 450 based on the Company's leverage ratio and was set at 450 basis points as of December 31, 2019 . Annual maturities of long-term debt are as follows: 2020 $ 49,451,000 Interest Rate Swaps The Company entered into two interest rate swap agreements that became effective January 18, 2018 and continue through January 2023, one of which was designated as a cash flow hedge for $25,000,000 of the $32,000,000 term loan to the Company mentioned above and the other designated as a cash flow hedge for $10,000,000 of the $13,000,000 term loan to the Subsidiary mentioned above. Under these agreements, the Company pays a fixed rate of 2.49% to the counterparty and receives 30 day LIBOR for both cash flow hedges. The fair value of the interest rate swaps was a liability of $706,000 and $ 65,000 at December 31, 2019 and 2018, respectively. While the Company is exposed to credit loss on its interest rate swaps in the event of non-performance by the counter party to the swap, management believes that such non-performance is unlikely to occur given the financial resources of the counter party. Bank Covenants The Company is required to meet certain financial covenants included in the A/R Credit Agreement with respect to leverage ratios, fixed charge ratios and capital expenditures. As of December 31, 2019 , the Company was in default with its fixed charge coverage and leverage ratio covenants associated with the loans made under the A/R Credit Agreement as described above. As a result of this default the Company and the Administrative Agent on behalf of the Lenders entered into a Forbearance Agreement to address the non-compliance and establish milestones for the Company related to restructuring of its existing debt. Effective March 13, 2020, the Company entered into an Amended Forbearance Agreement to modify existing and establish new milestones. Management is pursuing the restructuring or refinancing of its existing obligations under the A/R Credit Agreement. The Company has engaged Huron Transactional Advisor's to facilitate a full marketing processes for refinancing the A/R Credit Agreement. Management and Huron are evaluating term sheets submitted by potential lending sources. The Company is considering financing options including an asset backed lending facility using the Company’s accounts receivable and inventories as security, term loans secured with the Company’s real estate and machinery and equipment, sale and leaseback of Company owned real estate and potential equity financing. Any new financing remains subject to asset appraisals, field exams, financial projection due diligence, real estate environmental reviews, and other customary legal documentation.

Stock Based Compensation

Stock Based Compensation	12 Months Ended
Stock Based Compensation	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation The Company has a Long Term Equity Incentive Plan (the “2006 Plan”), as approved by the Company’s stockholders in May 2006. The 2006 Plan allows for grants to directors and employees of non-qualified stock options, incentive stock options, stock appreciation rights, restricted stock, performance shares, performance units and other incentive awards (“Stock Awards”) up to an aggregate of 3,000,000 awards, each representing a right to buy a share of Core Molding Technologies common stock. Stock Awards can be granted under the 2006 Plan through the earlier of December 31, 2025, or the date the maximum number of available awards under the 2006 Plan have been granted. The number of shares remaining available for future issuance is 744,697 . Restricted stock granted under the 2006 Plan typically require the individuals receiving the grants to maintain certain common stock ownership thresholds and vest over three years or upon the date of the participants' sixty-fifth birthday, death, disability or change in control. Core Molding Technologies follows the provisions of FASB ASC 718 requiring that compensation cost relating to share-based payment transactions be recognized in the financial statements. The cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the employee's requisite service period (generally the vesting period of the equity award). Restricted Stock The Company grants shares of its common stock to certain directors, officers, and key employees in the form of unvested stock (“Restricted Stock”). These awards are recorded at the market value of Core Molding Technologies’ common stock on the date of issuance and amortized ratably as compensation expense over the applicable vesting period. The following summarizes the status of Restricted Stock and changes during the years ended December 31: 2019 2018 2017 Number Wtd. Avg. Number of Shares Wtd. Avg. Grant Date Fair Value Number of Shares Wtd. Avg. Unvested - beginning of year 349,885 $ 10.62 141,095 $ 16.79 158,261 $ 14.55 Granted 135,268 7.65 315,429 11.32 84,643 19.17 Vested (117,828 ) 13.81 (82,067 ) 16.57 (95,717 ) 15.25 Forfeited (23,406 ) 15.02 (24,572 ) 16.91 (6,092 ) 17.93 Unvested - end of year 343,919 $ 9.37 349,885 $ 10.62 141,095 $ 16.79 At December 31, 2019 and 2018 , there was $ 1,923,000 and $ 2,598,000 , respectively, of total unrecognized compensation expense related to restricted stock granted under the 2006 Plan. That cost is expected to be recognized over the weighted-average period of 1.8 years. Total compensation expense related to restricted stock grants for the years ended December 31, 2019 , 2018 and 2017 was $ 1,379,000 , $ 1,774,000 and $ 1,331,000 , respectively, and is recorded as selling, general and administrative expense. During 2017, the Company adopted Accounting Standards Update 2016-09, Compensation - Stock Compensation. The new standard provided for changes to accounting for stock compensation, including excess tax benefits and tax deficiencies related to share based payment awards to be recognized in income tax expense in the reporting period in which they occurred. Tax benefits and tax deficiencies before this update were recorded as an increase or decrease in additional paid in capital. Tax benefits and deficiencies for the years ended December 31, 2019, 2018 and 2017 were a deficiency of $ 110,000 , a deficiency of $ 33,000 and a benefit of $ 126,000 , respectively. During 2019 , 2018 and 2017 , employees surrendered 16,047 , 17,180 and 19,533 shares, respectfully, of the Company's common stock to satisfy income tax withholding obligations in connection with the vesting of restricted stock. Stock Appreciation Rights As part of the Company's 2019 annual grant, Stock Appreciation Rights (SARs) were granted with a grant price of $ 10 . These awards have a contractual term of five years and vest ratably over a period of three years or immediately vest if the recipient is over 65 years of age. These awards are valued using the Black-Scholes option pricing model. A summary of the Company's stock appreciation rights activity for the year ended December 31, 2019 is as follows: Number of Weighted Average Outstanding as of December 31, 2018 — $ — Granted 226,021 2.57 Exercised — — Forfeited (3,909 ) 2.57 Outstanding at the period ended December 31, 2019 222,112 $ 2.57 Exercisable at the period ended December 31, 2019 29,028 $ 2.57 The average remaining contractual term for those SARs outstanding at December 31, 2019 is 4.3 years, with no aggregate intrinsic value. At December 31, 2019 and 2018 , there was $386,000 and $0 , respectively, of total unrecognized compensation expense, net of estimated forfeitures, related to SARs. That cost is expected to be recognized over the weighted-average period of 2.3 years. Total compensation cost related to SARs for the twelve months ended December 31, 2019 and 2018 was $185,000 and $0 , respectively, all of which was recorded to selling, general and administrative expense.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Components of the provision for income taxes are as follows: 2019 2018 2017 Current: Federal - US $ — $ 11,000 $ 1,993,000 Foreign 685,000 1,023,000 613,000 State and local 20,000 14,000 24,000 705,000 1,048,000 2,630,000 Deferred: Federal 738,000 (1,355,000 ) (407,000 ) Foreign (1,824,000 ) (289,000 ) 52,000 State and local 26,000 (68,000 ) 11,000 (1,060,000 ) (1,712,000 ) (344,000 ) Provision (benefit) for income taxes $ (355,000 ) $ (664,000 ) $ 2,286,000 A reconciliation of the income tax provision based on the federal statutory income tax rate to the Company's income tax provision for the years ended December 31 is as follows: 2019 2018 2017 Provision at US federal statutory rate $ (3,274,000 ) $ (1,145,000 ) $ 2,634,000 Adjustments for US tax law changes — — (185,000 ) Valuation allowance 3,267,000 — — Effect of foreign taxes (209,000 ) 213,000 (58,000 ) Adoption of ASC 606 — 236,000 — State and local tax expense (102,000 ) (54,000 ) 35,000 Other (37,000 ) 86,000 (140,000 ) Provision (benefit) for income taxes $ (355,000 ) $ (664,000 ) 2,286,000 The Tax Cuts and Jobs Act (“the “Act”) was enacted on December 22, 2017. The Act reduced the U.S. federal corporate income tax rate from 35% to 21%, required companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred, created new taxes on certain foreign sourced earnings, provided for acceleration of business asset expensing, and reduced the amount of executive pay that may qualify as a tax deduction, among other changes. FASB ASC 740 required the recognition of the effects of tax law changes in 2017. During 2017, the Company recorded a net benefit charge related to the re-measurement of the deferred tax balance of $484,000 . Additionally, the Company recorded a provisional charge related to the transition tax, net of estimated foreign tax credits, of $299,000 . The Company records excess tax benefits and tax deficiencies related to share based payment awards in income tax expense in the reporting period in which they occurred. Tax benefits and deficiencies for the years ended December 31, 2019, 2018 and 2017 were a deficiency of $110,000 and $33,000 and a benefit of $ 126,000 , respectively. The Company evaluates the balance of deferred tax assets that will be realized based on the premise that the Company is more likely than not to realize deferred tax benefits through the generation of future taxable income. Management makes assumptions, judgments, and estimates to determine our current and deferred tax provision and also the deferred tax assets and liabilities. The Company evaluates provisions and deferred tax assets quarterly to determine if adjustments to our valuation allowance are required based on the consideration of all available evidence. As of December 31, 2019 the Company had a deferred tax asset of $5,293,000 of which $3,267,000 is related to tax positions in the United States, $1,555,000 related to tax positions in Canada and $471,000 related to tax positions in Mexico. During 2019, the Company recorded a valuation allowance against all deferred tax assets in the United States, due to cumulative losses over the last three years and uncertainty related to the Company’s ability to realize net loss carryforwards and other net deferred tax assets in the future. The Company believes that the deferred tax assets associated with the Canadian and Mexican tax jurisdictions are more-likely-than-not to be realizable based on estimates of future taxable income and the Company's ability to carryback losses. Deferred tax assets consist of the following at December 31: 2019 2018 Current asset (liability): Net operating loss carryforwards $ 4,928,000 $ 456,000 Interest limitation carryforwards 686,000 394,000 Accrued liabilities 477,000 568,000 Accounts receivable 108,000 521,000 Inventory 587,000 525,000 Other, net (190,000 ) (446,000 ) Total current asset 6,596,000 2,018,000 Non-current asset (liability): Property, plant, and equipment (5,580,000 ) (3,941,000 ) Post retirement benefits 2,090,000 1,848,000 Goodwill and finite-lived assets, net 1,973,000 994,000 Other, net 214,000 234,000 Total non-current liability (1,303,000 ) (865,000 ) Valuation allowance for deferred tax assets (3,267,000 ) $ — Total deferred tax asset (liability), net $ 2,026,000 $ 1,153,000 At December 31, 2019, the Company had estimated net operating loss carryforwards and interest limitation carryforwards in the U.S. federal jurisdiction of $17,994,000 and $3,120,000 , respectively. Both carryforwards do not expire. At December 31, 2019, the Company had estimated net operating loss carryforwards in Canada of $5,772,000 , of which $2,116,000 can be carried back to prior years. The remaining $3,656,000 expire in the year 2039 . At December 31, 2019 and 2018 the Company had no liability for unrecognized tax benefits under guidance relating to tax uncertainties. The Company does not anticipate that the unrecognized tax benefits will significantly change within the next twelve months. The Company files income tax returns in the U.S. federal jurisdiction, Mexico, Canada and various state and local jurisdictions. The Company is not subject to U.S. federal and state income tax examinations by tax authorities for the years before 2016, not subject to Mexican income tax examinations by Mexican authorities for the years before 2014 and not subject to Canadian income tax examinations by Canadian authorities for the years before 2018.

Post Retirement Benefits

Post Retirement Benefits	12 Months Ended
Post Retirement Benefits	Dec. 31, 2019
Retirement Benefits [Abstract]
Post Retirement Benefits	Post Retirement Benefits The Company provides post retirement benefits to certain of its United States and Canadian employees, including contributions to a multi-employer defined benefit pension plan, health care and life insurance benefits, and contributions to several defined retirement contribution plans. The Company contributes to a multi-employer defined benefit pension plan for its employees represented by the International Association of Machinists and Aerospace Workers ("IAM") at the Company’s Columbus, Ohio production facility. The Company does not administer this plan and contributions are determined in accordance with provisions of the collective bargaining agreement. The risks of participating in this multi-employer plan are different from a single-employer plan in the following aspects: • Assets contributed to the multi-employer plan by one employer may be used to provide benefits to employees of other participating employers. • If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. • If the Company chooses to stop participating in its multi-employer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability. The Company’s participation in the multi-employer defined benefit pension plan for the years ended December 31, 2019 and 2018 is outlined in the table below. The most recent Pension Protection Act ("PPA") zone status available in 2019 and 2018 is for the plan’s year-end at December 31, 2018 , and December 31, 2017 , respectively. The zone status is based on information the Company received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65% funded, plans in the yellow zone are less than 80% funded, and plans in the green zone are at least 80% funded. The “FIP/RP Status Pending/Implemented” column indicates whether a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending or has been implemented. Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status FIP/RP Status Pending/ Implemented Contributions of the Company Surcharge Imposed Expiration Date of Collective Bargaining Agreement 2019 2018 2019 2018 IAM National Pension Fund / National Pension Plan (A) 51-6031295 - 002 Red as of 12/31/18 Green as of 12/31/17 Implemented $971,000 $760,000 Yes 8/7/2022 Total Contributions: $971,000 $760,000 (A) The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2018. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week at $1.55 per hour from August 10, 2019 through August 6, 2022. Prior to the acquisition of Columbus Plastics, certain of the Company's employees were participants, or were eligible to participate, in Navistar's post retirement health and life insurance benefit plan. This plan provides healthcare and life insurance benefits for certain employees upon their retirement, along with their spouses and certain dependents and requires cost sharing between the Company, Navistar and the participants, in the form of premiums, co-payments, and deductibles. The Company and Navistar share the cost of benefits for these employees, using a formula that allocates the cost based upon the respective portion of time that the employee was an active service participant after the acquisition of Columbus Plastics to the period of active service prior to the acquisition of Columbus Plastics. The Company also sponsors a post retirement health and life insurance benefit plan for certain union retirees of its Columbus, Ohio production facility. In August 2010, as part of a new collective-bargaining agreement, the post retirement health and life insurance benefits for all current and future represented employees who were not retired were eliminated in exchange for a one-time cash payment. Individuals who retired prior to August 2010 remain eligible for post retirement health and life insurance benefits. The elimination of post retirement health and life insurance benefits described above resulted in a reduction of the Company’s post retirement benefits liability of approximately $10,282,000 in 2010. This reduction in post retirement benefits liability was treated as a negative plan amendment and is being amortized as a reduction to net periodic benefit cost over approximately twenty years, the actuarial life expectancy of the remaining participants in the plan at the time of the amendment. This negative plan amendment resulted in net periodic benefit cost reductions of approximately $496,000 in 2019 , 2018 and 2017 , and will result in net periodic benefit cost reductions of approximately $496,000 in 2020 and each year thereafter during the amortization period. The funded status of the Company's post retirement health and life insurance benefits plan as of December 31, 2019 and 2018 and reconciliation with the amounts recognized in the consolidated balance sheets are provided below: Post Retirement Benefits 2019 2018 Change in benefit obligation: Benefit obligation at January 1 $ 8,076,000 $ 9,050,000 Interest cost 285,000 277,000 Unrecognized loss (gain) 1,099,000 (910,000 ) Benefits paid, net (300,000 ) (341,000 ) Benefit obligation at December 31 $ 9,160,000 $ 8,076,000 Plan Assets — — Amounts recorded in accumulated other comprehensive income: Prior service credit $ (5,610,000 ) $ (6,106,000 ) Net loss 3,634,000 2,652,000 Total $ (1,976,000 ) $ (3,454,000 ) Weighted-average assumptions as of December 31: Discount rate used to determine benefit obligation and net periodic benefit cost 2.9 % 4.0 % The components of expense for all of the Company's post retirement benefit plans for the years ended December 31: 2019 2018 2017 Pension expense: Multi-employer plan $ 971,000 $ 760,000 $ 647,000 Defined contribution plans 1,258,000 1,059,000 752,000 Total pension expense 2,229,000 1,819,000 1,399,000 Health and life insurance: Interest cost 285,000 277,000 298,000 Amortization of prior service costs (496,000 ) (496,000 ) (496,000 ) Amortization of net loss 117,000 171,000 149,000 Net periodic benefit cost (94,000 ) (48,000 ) (49,000 ) Total post retirement benefits expense $ 2,135,000 $ 1,771,000 $ 1,350,000 The Company accounts for post retirement benefits under FASB ASC 715, which requires the recognition of the funded status of a defined benefit pension or post retirement plan in the consolidated balance sheets. For the year ended December 31, 2019 , the Company recognized a net actuarial loss of $ 1,099,000 and for the year ended December 31, 2018 recognized a net actuarial gain of $ 910,000 , both of which were recorded in accumulated other comprehensive income. Amounts not yet recognized as a component of net periodic benefit costs at December 31, 2019 and 2018 were a net credit of $ 1,976,000 and $ 3,454,000 , respectively. The amount in accumulated other comprehensive income expected to be recognized as components of net periodic post retirement cost during 2020 consists of a prior service credit of $ 496,000 and a net loss of $ 181,000 . In addition, 2020 interest expense related to post retirement healthcare is expected to be $ 237,000 , for a total post retirement healthcare net gain of approximately $ 78,000 in 2020 . The Company expects benefits paid in 2020 to be consistent with estimated future benefit payments as shown in the table below. The weighted average rate of increase in the per capita cost of covered health care benefits is projected to be 6.0% . The rate is projected to decrease gradually to 5.0% by the year 2025 and remain at that level thereafter. The comparable assumptions for the prior year were 6.2% and 5.0% , respectively. The effect of changing the health care cost trend rate by one-percentage point for each future year is as follows: 1- Percentage Point Increase 1-Percentage Point Decrease Effect on total of service and interest cost components $ 39,000 $ (33,000 ) Effect on post retirement benefit obligation $ 1,169,000 $ (997,000 ) The estimated future benefit payments of the health care plan for the next ten years are as follows: Year Postretirement Health Care Benefits Plan 2020 $ 1,233,000 2021 470,000 2022 497,000 2023 519,000 2024 496,000 2025 - 2029 2,438,000

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, the Company is involved in litigation incidental to the conduct of its business. However, the Company is presently not involved in any legal proceedings which in the opinion of management are likely to have a material adverse effect on the Company's consolidated financial position or results of operations.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
Fair Value of Financial Instruments	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in a transaction between market participants as of the measurement date. Fair value is measured using the fair value hierarchy and related valuation methodologies as defined in the authoritative literature. This guidance provides a fair value framework that requires the categorization of assets and liabilities into three levels based upon the assumptions (inputs) used to price the assets or liabilities. Level 1 provides the most reliable measure of fair value, whereas Level 3 generally requires significant management judgment. The three levels are defined as follows: Level 1 - Quoted prices in active markets for identical assets and liabilities. Level 2 - Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets. Level 3 - Significant unobservable inputs reflecting management's own assumptions about the inputs used in pricing the asset or liability. The Company’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, debt, interest rate swaps and foreign currency derivatives. Cash and cash equivalents, accounts receivable and accounts payable carrying values as of December 31, 2019 and December 31, 2018 approximate fair value due to the short-term maturities of these financial instruments. The carrying amounts of long-term debt and the revolving line of credit approximate fair value as of December 31, 2019 and December 31, 2018 due to the short term nature of the underlying variable rate LIBOR agreements. The Company had Level 2 fair value measurements at December 31, 2019 and December 31, 2018 relating to the Company’s interest rate swaps and foreign currency derivatives. Derivative and hedging activities Foreign currency derivatives The Company conducted business in foreign countries and paid certain expenses in foreign currencies; therefore, the Company was exposed to foreign currency exchange risk between the U.S. Dollar and foreign currencies, which could impact the Company’s operating income and cash flows. To mitigate risk associated with foreign currency exchange, the Company entered into forward contracts to exchange a fixed amount of U.S. Dollars for a fixed amount of foreign currency, which will be used to fund future foreign currency cash flows. At inception, all forward contracts are formally documented as cash flow hedges and are measured at fair value each reporting period. Derivatives are formally assessed both at inception and at least quarterly thereafter, to ensure that derivatives used in hedging transactions are highly effective in offsetting changes in cash flows of the hedged item. If it is determined that a derivative ceases to be a highly effective hedge, or if the anticipated transaction is no longer probable of occurring, hedge accounting is discontinued, and any future mark-to-market adjustments are recognized in earnings. The effective portion of gain or loss is reported in other comprehensive income and the ineffective portion is reported in earnings. The impacts of these contracts were largely offset by gains and losses resulting from the impact of changes in exchange rates on transactions denominated in the foreign currency. As of December 31, 2019, the Company had no ineffective portion related to the cash flow hedges. Interest Rate Swaps The Company entered into interest rate swap contracts to fix the interest rate on an initial aggregate amount of $35,000,000 thereby reducing exposure to interest rate changes. The Company pays a fixed rate of 2.49% to the counterparty and receives 30 day LIBOR for both cash flow hedges. At inception, all interest rate swaps were formally documented as cash flow hedges and are measured at fair value each reporting period. See Note 10 - Debt , for additional information. Financial statements impacts The following tables detail amounts related to our derivatives designated as hedging instruments as of December 31, 2019 : Fair Values of Derivatives Instruments Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value Foreign exchange contracts Prepaid expense other current assets $ 452,000 Accrued liabilities other $ — Notional contract values 15,358,000 — Interest rate swaps Other non-current assets — Other non-current liabilities 706,000 Notional swap values $ — $ 29,750,000 As of December 31, 2019 , the Company had foreign exchange contracts related to the Mexican Peso and the Candian Dollar with exchange rates ranging from 19.53 to 20.58 and 1.32 , respectively The following tables detail amounts related to our derivatives designated as hedging instruments as of December 31, 2018 : Fair Values of Derivatives Instruments Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value Foreign exchange contracts Prepaid expense other current assets — Accrued liabilities other $ 750,000 Notional contract values — $ 27,588,000 Interest rate swaps Other non-current assets — Other non-current liabilities $ 65,000 Notional swap values — $ 32,375,000 As of December 31, 2018 , the Company had foreign exchange contracts related to the Mexican Peso and the Canadian Dollar with exchange rates ranging from 19.52 to 20.47 and 1.28 to 1.33 , respectively. The following tables summarize the amount of unrealized / realized gain and loss recognized in Accumulated Comprehensive Income (AOCI) for the years ended December 31, 2019 , 2018 and 2017 : Derivatives in subtopic 815-20 Cash Flow Hedging Relationship Amount of Unrealized Gain or (Loss) Recognized in Accumulated other Comprehensive Income on Derivative Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (A) Amount of Realized Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income 2019 2018 2017 2019 2018 2017 Foreign exchange contracts $1,499,000 $(385,000) $517,000 Cost of goods sold $272,000 $68,000 $445,000 Selling, general and administrative expense $25,000 $— $67,000 Interest rate swaps $(708,000) $(223,000) $— Interest Expense $(67,000) $(159,000) $— (A) The foreign currency derivative activity reclassified from Accumulated Other Comprehensive Income is allocated to cost of goods sold and selling, general and administrative expense based on the percentage of Mexican Peso spend. Non-recurring fair value measurements See N ote 8- Horizon Plastics Acquisition, for non-recurring fair value measurements for the year ended December 31, 2018.

AOCI (Notes)

AOCI (Notes)	12 Months Ended
AOCI (Notes)	Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table presents changes in Accumulated Other Comprehensive Income by component, net of tax, for the years ended December 31, 2019 and 2018 : Hedging Derivative Activities Post Retirement Benefit Plan Items (A) Total 2018: Balance at January 1, 2018 $ (197,000 ) $ 2,267,000 $ 2,070,000 Other comprehensive income before reclassifications (608,000 ) 910,000 302,000 Amounts reclassified from accumulated other comprehensive income 91,000 (325,000 ) (234,000 ) Income tax (expense) benefit 102,000 (123,000 ) (21,000 ) Balance at December 31, 2018 $ (612,000 ) $ 2,729,000 $ 2,117,000 2019: Balance at January 1, 2019 $ (612,000 ) $ 2,729,000 $ 2,117,000 Other comprehensive income before reclassifications 791,000 (1,102,000 ) (311,000 ) Amounts reclassified from accumulated other comprehensive income (230,000 ) (379,000 ) (609,000 ) Income tax (expense) benefit (140,000 ) 313,000 173,000 Balance at December 31, 2019 $ (191,000 ) $ 1,561,000 $ 1,370,000 (A) The effect of post-retirement benefit items reclassified from Accumulated Other Comprehensive Income is included in total cost of sales on the Consolidated Statements of Income. These Accumulated Other Comprehensive Income components are included in the computation of net periodic benefit cost (see Note 13 - Post Retirement Benefits for additional details). The tax effect of post-retirement benefit items reclassified from Accumulated Other Comprehensive Income is included in income tax expense on the Consolidated Statements of Income.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
Quarterly Results of Operations (Unaudited)	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2019 , 2018 and 2017 . 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Year 2019: Product sales $ 71,451,000 $ 75,440,000 $ 67,511,000 $ 54,585,000 $ 268,987,000 Tooling sales 815,000 5,807,000 7,144,000 1,537,000 15,303,000 Net sales 72,266,000 81,247,000 74,655,000 56,122,000 284,290,000 Gross margin 3,149,000 8,491,000 6,484,000 3,382,000 21,506,000 Operating income (loss) (4,017,000 ) 1,267,000 (4,657,000 ) (4,121,000 ) (11,528,000 ) Net income (loss) (3,845,000 ) 209,000 (6,125,000 ) (5,462,000 ) (15,223,000 ) Net income (loss) per common share: Basic (1) $ (0.49 ) $ 0.03 $ (0.78 ) $ (0.69 ) $ (1.94 ) Diluted (1) $ (0.49 ) $ 0.03 $ (0.78 ) $ (0.69 ) $ (1.94 ) 2018: Product sales $ 59,712,000 $ 65,225,000 $ 62,305,000 $ 68,975,000 $ 256,217,000 Tooling sales 3,334,000 3,376,000 2,371,000 4,187,000 13,268,000 Net sales 63,046,000 68,601,000 64,676,000 73,162,000 269,485,000 Gross margin 7,885,000 7,897,000 4,862,000 6,497,000 27,141,000 Operating income (loss) 1,125,000 1,418,000 (1,487,000 ) (4,156,000 ) (3,100,000 ) Net income (loss) 518,000 445,000 (1,803,000 ) (3,942,000 ) (4,782,000 ) Net income (loss) per common share: Basic (1) $ 0.07 $ 0.06 $ (0.23 ) $ (0.51 ) $ (0.62 ) Diluted (1) $ 0.07 $ 0.06 $ (0.23 ) $ (0.51 ) $ (0.62 ) 2017: Product sales $ 36,336,000 $ 36,794,000 $ 37,593,000 $ 37,900,000 $ 148,623,000 Tooling sales 410,000 10,574,000 901,000 1,165,000 13,050,000 Net sales 36,746,000 47,368,000 38,494,000 39,065,000 161,673,000 Gross margin 6,479,000 7,341,000 5,752,000 5,059,000 24,631,000 Operating income 2,554,000 3,173,000 1,394,000 820,000 7,941,000 Net income 1,688,000 2,162,000 855,000 754,000 5,459,000 Net income per common share: Basic (1) $ 0.22 $ 0.28 $ 0.11 $ 0.10 $ 0.71 Diluted (1) $ 0.22 $ 0.28 $ 0.11 $ 0.10 $ 0.70 (1) Sum of the quarters may not sum to total year due to rounding.

Schedule II (Notes)

Schedule II (Notes)	12 Months Ended
Schedule II (Notes)	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II	Core Molding Technologies, Inc. and Subsidiaries Schedule II Consolidated valuation and qualifying accounts and reserves for the years ended December 31, 2019 , 2018 and 2017 . Reserves deducted from asset to which it applies: Allowance for Doubtful Accounts Additions Balance at Beginning of Year (Recovered)/Charged to Costs & Expenses Charged to Other Accounts Deductions (A) Balance at End of Year Year Ended December 31, 2019 $ 25,000 $ 4,000 $ 36,000 $ 15,000 $ 50,000 Year Ended December 31, 2018 $ — $ 25,000 $ — $ — $ 25,000 Year Ended December 31, 2017 $ — $ — $ — $ — $ — Customer Chargeback Allowance Additions Balance at Beginning of Year (Recovered)/Charged to Costs & Expenses Charged to Other Accounts Deductions (B) Balance at End of Year Year Ended December 31, 2019 $ 2,344,000 $ 1,316,000 $ — $ 3,184,000 $ 476,000 Year Ended December 31, 2018 $ 857,000 $ 2,639,000 $ — $ 1,152,000 $ 2,344,000 Year Ended December 31, 2017 $ 309,000 $ 981,000 $ — $ 433,000 $ 857,000 (A) Amount represents uncollectible accounts written off. (B) Amount represents customer returns and deductions, discounts and price adjustments accepted.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2019
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation - The accompanying consolidated financial statements include the accounts of all subsidiaries after elimination of all intercompany accounts, transactions, and profits.
Use of Estimates	Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities, and reported amounts of revenues and expenses during the reporting period. Significant estimates relate to allowances for doubtful accounts, inventory reserves, self-insurance reserves related to healthcare and workers compensation, deferred taxes, post retirement benefits, progress billings for tooling, goodwill and long-lived assets. Actual results could differ from those estimates.
Substantial Doubt about Going Concern [Text Block]	Going Concern - Under FASB ASU 2014-15, “Presentation of Financial Statements - Going Concern,” management is required to evaluate conditions or events as related to uncertainties that raise substantial doubt about the Company’s ability to continue as a going concern and to provide related financial disclosures, as applicable. Our consolidated financial statements have been prepared on a going-concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. As further discussed in Note 10 - Debt , as of December 31, 2019, the Company was not in compliance with the fixed charge coverage ratio requirement under the Company's Amended and Restated Credit Agreement, dated January 16, 2018 (the “A/R Credit Agreement”), with KeyBank National Association as the administrative agent (the "Administrative Agent") and various other financial institutions thereto as lenders (the "Lenders"). On November 22, 2019, the Company entered into a forbearance agreement (the "Forbearance Agreement") with the Lenders. Pursuant to the Forbearance Agreement, the Borrowers and the Lenders acknowledged and confirmed that an event of default occurred under the A/R Credit Agreement resulting from the Borrowers failure to maintain the required Fixed Charge Coverage Ratio (as defined in the A/R Credit Agreement”) for the fiscal quarter ended September 30, 2019. The Forbearance Agreement provides that the Administrative Agent and Lenders shall forbear from the exercise of rights and remedies pursuant to the Loan Documents described in the A/R Credit Agreement through March 13, 2020, as long as the Company satisfies the conditions set forth in the Forbearance Agreement, including, (i) the Borrowers shall remain current on all loan payments during the forbearance period, (ii) on or before December 6, 2019, the Administrative Agent and Lenders shall each receive a copy of a report of Huron Consulting Group containing findings and observations in respect of the businesses and operations of the Company and the Borrowers shall deliver a strategic alternative assessment in respect of the Borrowers’ operations and financing, (iii) on or before December 15, 2019, the Administrative Agent and Lenders shall each receive a copy of appraisals of machinery and equipment and inventory appraisals, and the Borrowers shall have determined and proposed a new capital structure to the Administrative Agent and Lenders, (iv) on or before February 14, 2020, the Borrowers shall have obtained a definitive, written commitment from involved parties and/or lenders providing the basis for implementation of a new capital structure, and (v) on or before March 13, 2020, the Borrowers shall have closed on a new capital structure, acceptable to the Administrative Agents and Lenders. The Forbearance Agreement also implemented a new availability block with respect to the U.S. Revolving Loans portion of the A/R Credit Agreement, reducing availability from $32,500,000 to $28,000,000 and increasing the applicable margin for existing term and revolving loans, as well as increasing the commitment fees on any unused U.S. Revolving Loans. On March 13, 2020, the Company entered into the first Amendment to the Forbearance Agreement (the “Amended Forbearance Agreement”) with the Lenders. Pursuant to the terms of the Amended Forbearance Agreement, the Company and Lenders agreed to modify certain terms of the Forbearance Agreement and extend the Forbearance Agreement through May 29, 2020. The modifications include (1) a reduction in the U.S. Revolving Loan to $ 25,000,000 with an availability block of $ 5,000,000 which can be borrowed with the approval of the lenders, (2) a change of interest rate to LIBOR rate plus 650 basis points, (3) forebear compliance with the leverage covenant and fixed charge covenant through May 29, 2020, and (4) implementation of a capital expenditure spend limit of $ 3,500,000 from the effective date of the Amended Forbearance Agreement through May 29, 2020, (5) an increase in the commitment fees on any unused U.S. Revolving Loans. The Amended Forbearance Agreement provides that the Administrative Agent and Lenders shall forbear from the exercise of rights and remedies pursuant to the Loan Documents described in the Credit Agreement through May 29, 2020, as long as the Company satisfies the conditions set forth in the Amended Forbearance Agreement, including, (i) on or before March 31, 2020, the borrowers shall have obtained an executed term sheet from involved parties and/or lenders providing the basis for implementation of a new capital structure and defined due diligence parameters, (ii) on or before May 15, 2020 the Borrowers shall have obtained an executed definitive, written commitment from the New Lenders to enter into a definitive agreement to effect the refinancing, and (iii) on or before May 29, 2020, the borrowers shall have closed on a new capital structure. As a result of the Amended Forbearance Agreement not extending beyond a year, the Company’s remaining long-term debt under the A/R Credit Agreement, consisting of $49,451,000 in borrowings under the revolving credit commitment and the loan commitments, was classified as a current liability in the Company’s consolidated balance sheet as of December 31, 2019. As a result, the Company’s current liabilities exceeded its current assets by $22,609,000 as of December 31, 2019. If the Lenders were to call the loans or demand repayment of all existing borrowings, this could result in the Company being unable to meet its working capital obligations. The Company is evaluating several financing options to refinance some or all of the current obligations under the A/R Credit Agreement. The Company is considering financing options including an asset backed lending facility using the Company’s accounts receivable and inventories as security, term loans secured with the Company’s real estate and machinery and equipment, sale and leaseback of Company owned real estate and potential equity financing. The Company has obtained term sheets as a result of its marketing efforts and are evaluating alternatives. Any new financing remains subject to asset appraisals, field exams, financial projection due diligence, real estate environmental reviews, and other customary legal documentation. While the Company has executed an Amended Forbearance Agreement with existing Lenders, it can not guarantee that all conditions of the Amended Forbearance Agreement will be met, or predict if the Lenders will exercise their rights and remedies under the A/R Credit Agreement beyond the term of the Amended Forbearance Agreement. Additionally, since the Company has no firm commitments for additional financing, there can be no assurances that the Company will be able to secure additional financing on terms that are acceptable to the Company, or at all. As there can be no assurance that the Company will be able to successfully implement its refinancing plan, these conditions raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date the financial statements are issued. The Company's consolidated financial statements do not include adjustments, if any, that might arise from the outcome of this uncertainty. Management has been executing on its turnaround plan that started in December of 2018 and has been successful in improving equipment uptime, improving employee retention and reducing premium freight costs for expediting shipments to customers. While management believes these improvements have been successful and were the priority of the turnaround plan, operational efficiency improvements at the plants did not result in the level of financial improvements anticipated for 2019. Higher material usage and labor variances have impacted earnings and caused us to not meet forecasts established in the first quarter of 2019 when the Company entered into the First Amendment. Management remains focused on the operational turnaround and improving the financial performance of the Company in 2020. Management has, or is in the process of taking, the following actions to improve financial performance at its operating facilities: • Reorganized the Company’s leadership through the hiring of a new Chief Executive Officer, Executive Vice President of Operations, and Executive Vice President of Human Resources • Improved operational management team through hiring of new plant managers at several of our plants to provide stronger leadership • Developed specific action plans focused on reducing material usage and improving labor productivity • Implemented business and financial management systems to monitor performance by plant and drive improvement through timely identification of operational challenges • Engaged Huron Consulting Services to evaluate the Company’s turnaround financial projections, review with management various strategic alternatives that could result in a financing arrangement supported by projected future performance and serve as the Company’s financial adviser to work through modification or refinancing of the existing A/R Credit Agreement • Engaged a third party firm to appraise the Company’s assets in order to assess the financing capacity available from those assets • Implemented IATF certification process, which is a quality management system that provides for continual improvement, defect prevention and reduction of variation and waste in manufacturing processes. • Implemented inventory management systems to reduce stock outage events which cause downtime and labor inefficiency • Implemented customer price increases where margin on product was not meeting profitability targets, and evaluated relationships with major customers to assess ongoing profitability of those relationships • Reduced debt outstanding on the revolving line of credit by negotiating improved payment terms with significant customers • Established revised commercial terms with Volvo to allow for continued supply of product and rescinded the supply termination notification communicated to Volvo in November 2019 • Implemented cost saving measures and actions to align controllable spending and labor workforce to reduced sales volumes in the current truck market • Implementation of technical training programs specific to the Company’s products and processes • Improved free cash flow through reduction of working capital • Utilization of Kaizen techniques, process mapping and multi-functional problem solving teams to improve operational performance and reduce waste
Revenue Recognition	Revenue Recognition - The Company historically has recognized revenue from two streams, product revenue and tooling revenue. Product revenue is earned from the manufacture and sale of sheet molding compound and thermoset and thermoplastic products. Revenue from product sales is generally recognized as products are shipped, as the Company transfers control to the customer and is entitled to payment upon shipment. In certain circumstances, the Company recognizes revenue from product sales when products are produced and the customer takes control at our production facility. Tooling revenue is earned from manufacturing multiple tools, molds and assembly equipment as part of a tooling program for a customer. Given that the Company is providing a significant service of producing highly interdependent component parts of the tooling program, each tooling program consists of a single performance obligation to provide the customer the capability to produce a single product. Based on the arrangement with the customer, the Company recognizes revenue either at a point in time or over time. When the Company does not have an enforceable right to payment, the Company recognizes tooling revenue at a point in time. In such cases, the Company recognizes revenue upon customer acceptance, which is when the customer has legal title to the tools. The Company historically recognized all tooling revenue at a point in time, upon customer acceptance, before the adoption of ASU 2014-09. Certain tooling programs include an enforceable right to payment. In those cases, the Company recognizes revenue over time based on the extent of progress towards completion of its performance obligation. The Company uses a cost-to-cost measure of progress for such contracts because it best depicts the transfer of value to the customer and also correlates with the amount of consideration to which the entity expects to be entitled in exchange for transferring the promised goods or services to the customer. Under the cost-to-cost measure of progress, progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues are recorded proportionally as costs are incurred.
Cash and Cash Equivalents	Cash and Cash Equivalents - The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash is held primarily in two banks in 2 separate jurisdictions. The Company had $1,856,000 cash on hand at December 31, 2019 and had $1,891,000 on hand at December 31, 2018 .
Accounts Receivable Allowances	Accounts Receivable Allowances - Management maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. The Company has determined that a $ 50,000 allowance for doubtful accounts is needed at December 31, 2019 and $ 25,000 allowance was needed at December 31, 2018 . Management also records estimates for customer returns and deductions, discounts offered to customers, and for price adjustments. Should customer returns and deductions, discounts, and price adjustments fluctuate from the estimated amounts, additional allowances may be required. The Company had an allowance for estimated chargebacks of $ 476,000 at December 31, 2019 and $ 2,344,000 at December 31, 2018 . There have been no material changes in the methodology of these calculations
Inventories	Inventories - Inventories, which include material, labor and manufacturing overhead, are valued at the lower of cost or net realizable value. The inventories are accounted for using the first-in, first-out (FIFO) method of determining inventory costs. Inventory quantities on-hand are regularly reviewed, and where necessary, provisions for excess and obsolete inventory are recorded based on historical and anticipated usage. The Company has recorded an allowance for slow moving and obsolete inventory of $898,000 at December 31, 2019 and $957,000 at December 31, 2018
Contract with Customer, Asset and Liability [Table Text Block]	Contract Assets/Liabilities - Contract assets and liabilities represent the net cumulative customer billings, vendor payments and revenue recognized for tooling programs. For tooling programs where net revenue recognized and vendor payments exceed customer billings, the Company recognizes a contract asset. For tooling programs where net customer billings exceed revenue recognized and vendor payments, the Company recognizes a contract liability. Customer payment terms vary by contract and can range from progress payments based on work performed or one single payment once the contract is completed. Contract assets are generally classified as current. During the years ended December 31, 2019 and December 31, 2018, the Company recognized no impairments on contract assets. Contract liabilities are also generally classified as current. The Company recognized revenue related to contract liabilities. of $1,240,000 at December 31, 2019 and $449,000 at December 31, 2018 .
Property, Plant and Equipment	Property, Plant, and Equipment - Property, plant, and equipment are recorded at cost. Depreciation is provided on a straight-line method over the estimated useful lives of the assets. The carrying amount of long‑lived assets is evaluated annually to determine if adjustment to the depreciation period or to the unamortized balance is warranted. Ranges of estimated useful lives for computing depreciation are as follows: Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Depreciation expense was $8,187,000 , $7,361,000 and $6,190,000 for the years ended December 31, 2019 , 2018 and 2017 , respectively.
Long-Lived Assets	Long-Lived Assets - Long-lived assets consist primarily of property, plant and equipment and finite-lived intangibles. The Company acquired substantially all of the assets of Horizon Plastics on January 16, 2018, which resulted in approximately $ 16,770,000 of finite-lived intangibles and $ 12,994,000 of property, plant and equipment, all of which were recorded at fair value. The recoverability of long-lived assets is evaluated by an analysis of operating results and consideration of other significant events or changes in the business environment. The Company evaluates, whether impairment exists for long-lived assets on the basis of undiscounted expected future cash flows from operations before interest. There was no impairment of the Company's long-lived assets for the years ended December 31, 2019 , 2018 and 2017
Goodwill	Goodwill - The purchase consideration of acquired businesses have been allocated to the assets and liabilities acquired based on the estimated fair values on the respective acquisition dates. Based on these values, the excess purchase consideration over the fair value of the net assets acquired was allocated to goodwill. The Company accounts for goodwill in accordance with FASB ASC Topic 350, Intangibles - Goodwill and Other. FASB ASC Topic 350 prohibits the amortization of goodwill and requires these assets be reviewed for impairment at each reporting unit. As a result of the Horizon Plastics acquisition on January 16, 2018 and the status of its integration, the Company established two reporting units, Core Traditional and Horizon Plastics. The annual impairment tests of goodwill may be completed through qualitative assessments, however the Company may elect to bypass the qualitative assessment and proceed directly to a quantitative impairment test for any reporting unit in any period. The Company may resume the qualitative assessment for any reporting unit in any subsequent period. Under a qualitative and quantitative approach, the impairment test for goodwill consists of an assessment of whether it is more-likely-than-not that a reporting unit’s fair value is less than its carrying amount. As part of the qualitative assessment, the Company considers relevant events and circumstances that affect the fair value or carrying amount of the Company. Such events and circumstances could include changes in economic conditions, industry and market conditions, cost factors, overall financial performance, reporting unit specific events and capital markets pricing. The Company places more weight on the events and circumstances that most affect the Company's fair value or carrying amount. These factors are all considered by management in reaching its conclusion about whether to perform step one of the impairment test. If the Company elects to bypass the qualitative assessment for any reporting unit, or if a qualitative assessment indicates it is more-likely-than-not that the estimated carrying value of a reporting unit exceeds its fair value, the Company proceeds to a quantitative approach. Due to the Company's financial performance and continued depressed stock price, the Company performed a quantitative analysis for both of its reporting units at September 30, 2019. During 2019, the Company incurred a loss of margin in its Horizon Plastics reporting unit caused by selling price decreases that the Company has not been able to fully offset with material cost reductions. As a result of the quantitative analysis, the Company concluded that the carrying value of Horizon Plastics was greater than the fair value, which resulted in a goodwill impairment charge of $4,100,000 at September 30, 2019 representing 19% of the goodwill related to the Horizon Plastics reporting unit. The company performed a qualitative assessment at December 31, 2019, indicating no additional goodwill impairment related to the Horizon Plastics reporting unit. The Company’s annual impairment assessment at December 31, 2018 consisted of a quantitative analysis for both reporting units. It concluded that the carrying value of Core Traditional was greater than the fair value, which resulted in a goodwill impairment charge of $2,403,000 , representing all the goodwill related to the Core Traditional reporting unit. The analysis of the Company’s other reporting unit, Horizon Plastics, indicated no goodwill impairment charge, based on historical performance and financial projections at that time, as the excess of the estimated fair value over the carrying value of its invested capital was approximately 23% of the book value of its net assets. There was no impairment of the Company's goodwill for the year ended December 2017
Income Taxes	Income Taxes - The Company records deferred income taxes for differences between the financial reporting basis and income tax basis of assets and liabilities. A detailed breakout is located in Note 12 - Income Taxes .
Self-Insurance	Self-Insurance - The Company is self-insured with respect to Columbus and Batavia, Ohio, Gaffney, South Carolina, Winona, Minnesota and Brownsville, Texas for medical, dental and vision claims and Columbus and Batavia, Ohio for workers’ compensation claims, all of which are subject to stop-loss insurance thresholds. The Company is also self-insured for dental and vision with respect to its Cobourg, Canada location. The Company has recorded an estimated liability for self-insured medical, dental and vision claims incurred but not reported and worker’s compensation claims incurred but not reported at December 31, 2019 and December 31, 2018 of $ 1,203,000 and $ 960,000 , respectively.
Post Retirement Benefits	Post Retirement Benefits - Management records an accrual for post retirement costs associated with the health care plan sponsored by the Company for certain employees. Should actual results differ from the assumptions used to determine the reserves, additional provisions may be required. In particular, increases in future healthcare costs above the assumptions could have an adverse effect on the Company's operations. The effect of a change in healthcare costs is described in Note 13 - Post Retirement Benefits . Core Molding Technologies had a liability for post retirement healthcare benefits based on actuarially computed estimates of $ 9,160,000 at December 31, 2019 and $ 8,076,000 at December 31, 2018
Fair Value of Financial Instruments	Fair Value of Financial Instruments - The Company's financial instruments consist of long-term debt, revolving loans, interest rate swaps, foreign currency hedges, accounts receivable, and accounts payable. The carrying amount of these financial instruments approximated their fair value. Further detail is located in Note 15 - Fair Value of Financial Instruments.
Concentration Risk	Concentration Risks - The Company has concentration risk related to significant amounts of sales and accounts receivable with certain customers. The Company had four major customers during 2019 , Navistar, Volvo, PACCAR, and UFP. Major customers are defined as customers whose current year sales individually consist of more than ten percent of total sales during any annual or interim reporting period in the current year. Sales to four major customers comprised 62% , 65% and 65% of total sales in 2019 , 2018 and 2017 , respectively (see Note 4 - Major Customers ). Concentrations of accounts receivable balances with four customers accounted for 49% and 64% of accounts receivable at December 31, 2019 and 2018 , respectively. The Company performs ongoing credit evaluations of its customers' financial condition. The Company maintains reserves for potential bad debt losses, and such bad debt losses have been historically within the Company's expectations. Sales to all customers' manufacturing and service locations in Mexico and Canada totaled 34% , 32% and 36% of total sales for 2019 , 2018 and 2017 , respectively. As of December 31, 2019 , the Company employed a total of 1,821 employees, which consisted of 764 employees in its United States operations, 795 employees in its Mexican operations and 262 employees in its Canadian operation. Of these 1,821 employees, 341 are covered by a collective bargaining agreement with the International Association of Machinists and Aerospace Workers (“IAM”), which extends to August 7, 2022, and 635 are covered by a collective bargaining agreement with Sindicato de Jorneleros y Obreros, which extends to December 31, 2019. Additionally, 216 employees at the Company's Cobourg, Canada facility are covered by a collective bargaining agreement with United Food & Commercial Workers Canada ("UFCW"), which extends to November 1, 2021; and 35 employees at the Company's Escobedo, Mexico facility are covered by a collective bargaining agreement with Sindicato de trabajadores de la industria metalica y del comercio del estado de Nuevo Leon Presidente Benito Juarez Garcia C.T.M., which extends to February 1, 2020 and an extension is currently being negotiated.
Earnings Per Common Share	Earnings per Common Share - Basic earnings per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted earnings per common share are computed similarly but include the effect of the assumed exercise of dilutive stock options and vesting of restricted stock under the treasury stock method. A detailed computation of earnings per share is located in Note 3 - Net Income (Loss) per Common Share .
Research and Development	Research and Development - Research and development activities focus on developing new material formulations, new products, new production capabilities and processes, and improving existing products and manufacturing processes. The Company does not maintain a separate research and development organization or facility, but uses its production equipment, as necessary, to support these efforts and cooperates with its customers and its suppliers in research and development efforts. Likewise, manpower to direct and advance research and development is integrated with the existing manufacturing, engineering, production, and quality organizations. Research and development costs, which are expensed as incurred, totaled approximately $1,171,000 , $1,032,000 and $848,000 in 2019 , 2018 and 2017 .
Foreign Currency Adjustments	Foreign Currency Adjustments - The functional currency for the Mexican and Canadian operations is the United States Dollar. All foreign currency asset and liability amounts are remeasured into United States Dollars at end-of-period exchange rates. Income statement accounts are translated at the weighted monthly average rates. Gains and losses resulting from translation of foreign currency financial statements into United States Dollars and gains and losses resulting from foreign currency transactions are included in current results of operations. Net foreign currency translation and transaction activity is included in selling, general and administrative expense. This activity resulted in a gain of $229,000 , $88,000 and $30,000 in 2019 , 2018 and 2017 , respectively
Recent Accounting Pronouncements	Recent Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842). This update requires organizations to recognize lease assets and lease liabilities on the balance sheet and also disclose key information about leasing arrangements. This ASU is effective for annual reporting periods beginning on or after December 15, 2018, and interim periods within those annual periods. Earlier application is permitted for all entities as of the beginning of an interim or annual period. In accordance with ASU 2016-02, the Company elected not to recognize lease assets and lease liabilities for leases with a term of twelve months or less. The ASU requires a modified retrospective transition method, or a transition method option further described within ASU 2018-11, with the option to elect a package of practical expedients that permits the Company to: (1) not reassess whether expired or existing contracts contain leases, (2) not reassess lease classification for existing or expired leases and (3) not consider whether previously capitalized initial direct costs would be appropriate under the new standard. The Company elected to apply the package of practical expedients. The Company adopted ASU No. 2016-02 as of January 1, 2019, using the modified retrospective approach. The modified retrospective approach provides a method for recording existing leases at adoption without restating previously reported periods. In addition, the Company elected the practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. In addition, the Company elected the practical expedient to determine the lease term for existing leases. In the application of practical expedient, the Company evaluated the buildings leased and the current financial performance of the plant associated, which resulted in the determination that most renewal options would be reasonably certain in determining the expected lease term. Adoption of the new standard resulted in the recording of additional net right of use assets and lease liabilities of $4,490,000 and $4,428,000 , respectively, as of January 1, 2019. The present value of lease liabilities has been measured using the Company’s revolving loan borrowing rates as of December 31, 2018 (one day prior to initial application). Additionally, ROU assets for these operating leases have been measured as the initial measurement of applicable lease liabilities adjusted for any unamortized initial prepaid/accrued rent and any ASC Topic 420 liabilities. The standard did not materially impact the Company's consolidated statement of income (loss) or statement of cash flows. Current expected credit loss (CECL) In June 2016, the FASB issued ASU 2016-13, “Financial Instruments-Credit Losses,” which changes the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities will be required to use a new forward-looking “expected loss” model that will replace today’s “incurred loss” model and generally will result in the earlier recognition of allowances for losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to current practice, except that the losses will be recognized as an allowance. Subsequent to issuing ASU 2016-13, the FASB issued ASU 2018-19, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses,” for the purpose of clarifying certain aspects of ASU 2016-13. ASU 2018-19 has the same effective date and transition requirements as ASU 2016-13. In April 2019, the FASB issued ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments,” which is effective with the adoption of ASU 2016-13. In May 2019, the FASB issued ASU 2019-05, “Financial Instruments - Credit Losses (Topic 326),” which is also effective with the adoption of ASU 2016-13. In October 2019, the FASB voted to delay the implementation date for certain companies, including those that qualify as a smaller reporting company under SEC rules, until January 1, 2023, with revised ASU’s expected to be issued in November 2019. We will adopt this ASU on its effective date of January 1, 2023. We do not expect the adoption of this ASU to have a material impact on our consolidated financial position, results of operations, cash flows, or presentation thereof.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
Summary of Significant Accounting Policies (Tables)	Dec. 31, 2019
Accounting Policies [Abstract]
Components of property, plant and equipment	Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Property, plant, and equipment consisted of the following at December 31: 2019 2018 Land and land improvements $ 6,009,000 $ 6,009,000 Buildings 43,375,000 43,042,000 Machinery and equipment 118,366,000 108,661,000 Tools, dies, and patterns 1,516,000 1,419,000 Additions in progress 1,615,000 5,014,000 Total 170,881,000 164,145,000 Less accumulated depreciation (91,675,000 ) (83,488,000 ) Property, plant and equipment, net $ 79,206,000 $ 80,657,000

Net Income per Common Share (Ta

Net Income per Common Share (Tables)	12 Months Ended
Net Income per Common Share (Tables)	Dec. 31, 2019
Earnings Per Share [Abstract]
Computation of basic and diluted net income per common share	The computation of basic and diluted net income (loss) per common share is as follows: December 31, 2019 2018 2017 Net income (loss) $ (15,223,000 ) $ (4,782,000 ) $ 5,459,000 Weighted average common shares outstanding — basic 7,830,000 7,750,000 7,690,000 Effect of dilutive securities — — 57,000 Weighted average common and potentially issuable common shares outstanding — diluted 7,830,000 7,750,000 7,747,000 Basic net income (loss) per common share $ (1.94 ) $ (0.62 ) $ 0.71 Diluted net income (loss) per common share $ (1.94 ) $ (0.62 ) $ 0.70

Major Customers (Tables)

Major Customers (Tables)	12 Months Ended
Major Customers (Tables)	Dec. 31, 2019
Revenues [Abstract]
Major customers	The following table presents sales revenue for the above-mentioned customers for the years ended December 31: 2019 2018 2017 Navistar product sales $ 54,798,000 $ 52,347,000 $ 39,609,000 Navistar tooling sales 2,084,000 2,806,000 159,000 Total Navistar sales 56,882,000 55,153,000 39,768,000 Volvo product sales 48,487,000 46,063,000 27,627,000 Volvo tooling sales 262,000 97,000 8,089,000 Total Volvo sales 48,749,000 46,160,000 35,716,000 PACCAR product sales 44,543,000 38,027,000 26,481,000 PACCAR tooling sales 1,525,000 6,425,000 2,932,000 Total PACCAR sales 46,068,000 44,452,000 29,413,000 UFP product sales 25,395,000 27,906,000 — UFP tooling sales — 240,000 — Total UFP sales 25,395,000 28,146,000 — Other product sales 95,764,000 91,874,000 54,906,000 Other tooling sales 11,432,000 3,700,000 1,870,000 Total other sales 107,196,000 95,574,000 56,776,000 Total product sales 268,987,000 256,217,000 148,623,000 Total tooling sales 15,303,000 13,268,000 13,050,000 Total sales $ 284,290,000 $ 269,485,000 $ 161,673,000

Foreign Operations (Tables)

Foreign Operations (Tables)	12 Months Ended
Foreign Operations (Tables)	Dec. 31, 2019
Segment Reporting [Abstract]
Sales and property and equipment, net by country	The following table provides information related to sales by country, based on the ship to location of customers' production facilities, for the years ended December 31: 2019 2018 2017 United States $ 178,953,000 $ 181,207,000 $ 103,513,000 Mexico 79,761,000 74,029,000 52,496,000 Canada 16,988,000 12,494,000 5,664,000 Other 8,588,000 1,755,000 — Total $ 284,290,000 $ 269,485,000 $ 161,673,000 The following table provides information related to the location of property, plant and equipment, net, as of December 31: 2019 2018 United States $ 39,132,000 $ 37,778,000 Mexico 31,865,000 34,155,000 Canada 8,209,000 8,724,000 Total $ 79,206,000 $ 80,657,000

Property, Plant & Equipment (Ta

Property, Plant & Equipment (Tables)	12 Months Ended
Property, Plant & Equipment (Tables)	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Components of property, plant and equipment	Land improvements 20 years Buildings and improvements 20 - 40 years Machinery and equipment 3 - 15 years Tools, dies and patterns 3 - 5 years Property, plant, and equipment consisted of the following at December 31: 2019 2018 Land and land improvements $ 6,009,000 $ 6,009,000 Buildings 43,375,000 43,042,000 Machinery and equipment 118,366,000 108,661,000 Tools, dies, and patterns 1,516,000 1,419,000 Additions in progress 1,615,000 5,014,000 Total 170,881,000 164,145,000 Less accumulated depreciation (91,675,000 ) (83,488,000 ) Property, plant and equipment, net $ 79,206,000 $ 80,657,000

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2019
Leases [Abstract]
Lease, Cost [Table Text Block]	The components of lease expense were as follows: December 31, 2019 Operating lease cost $ 1,430,000 Total net lease cost $ 1,430,000
Supplemental Balance Sheet Disclosures [Text Block]	Other supplemental balance sheet information related to leases was as follows: December 31, 2019 Operating lease: Current operating lease right of use assets $ — Noncurrent operating lease right of use assets 4,484,000 Total operating lease right of use assets $ 4,484,000 December 31, 2019 Current operating lease liabilities (A) $ 1,304,000 Noncurrent operating lease liabilities 3,119,000 Total operating lease liabilities $ 4,423,000 Weighted average remaining lease term (in years): Operating leases 4.0 Weighted average discount rate: Operating lease 4.9 % (A) Current operating lease liability included in "Other Accrued Liabilities" on the Consolidated Balance Sheet.
Cash Flow, Supplemental Disclosures [Text Block]	Other information related to leases were as follows: December 31, 2019 Cash Paid for amounts included in the measurement of lease liabilities Operating cash flow from operating leases (B) $ 1,455,000 (B) Cash flow from operating lease included in "Prepaid and other assets" on the Consolidated Statements of Cash Flows.
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	As of December 31, 2019, maturities of lease liabilities were as follows: Operating Leases 2020 $ 1,433,000 2021 1,174,000 2022 1,102,000 2023 1,000,000 2024 530,000 Total lease payments 5,239,000 Less:imputed interest (816,000 ) Total lease obligations 4,423,000 Less:current obligations (1,304,000 ) Long-term lease obligations $ 3,119,000 As of December 31, 2018, maturities of lease liabilities were as follows: Operating Leases 2019 $ 1,291,000 2020 1,099,000 2021 838,000 2022 766,000 2023 661,000 2024 and Thereafter 331,000 Total minimum lease payments $ 4,986,000

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
Business Combination (Tables)	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The amount allocated to intangible assets has been attributed to the following categories and will be amortized over the useful lives of each individual asset identified on a straight-line basis as follows: Acquired Intangible Assets Estimated Fair Value Estimated Useful Life (Years) Non-competition Agreement $ 1,810,000 5 Trademarks 1,610,000 10 Developed Technology 4,420,000 7 Customer Relationships 8,930,000 12 Total $ 16,770,000
Business Acquisition, Pro Forma Information [Table Text Block]	The unaudited pro forma information is not necessarily indicative of the results that we would have achieved had the transactions actually taken place on January 1, 2017 and the unaudited pro forma information does not purport to be indicative of future financial operating results. Pro forma for the year ended December 31, 2018 2017 Net revenue $ 272,153,000 $ 222,015,000 Net income (loss) (3,788,000 ) 8,121,000 Net income (loss) per common share: Basic (0.49 ) 1.06 Diluted (0.49 ) 1.05
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block]	The unaudited pro forma net income includes the following adjustments that would have been recorded had the 2018 acquisition taken place on January 1, 2017. Pro forma for the year ended December 31, 2018 2017 Depreciation expense $ 55,000 $ 50,000 Amortization expense 78,000 1,876,000 Interest (income) expense (208,000 ) 1,705,000 Non-recurring transaction costs (1,289,000 ) (596,000 ) Income tax expense (benefit) 253,000 (880,000 )
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Consideration was allocated to assets acquired and liabilities assumed based on their fair values as of the acquisition date as follows: Accounts Receivable $ 7,677,000 Inventory 6,523,000 Other Current Assets 832,000 Property and Equipment 12,994,000 Intangibles 16,770,000 Goodwill 21,476,000 Accounts Payable (3,181,000 ) Other Current Liabilities (86,000 ) $ 63,005,000

Goodwill and Intangible Asset_2

Goodwill and Intangible Asset Disclosure (Tables)	12 Months Ended
Goodwill and Intangible Asset Disclosure (Tables)	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	Goodwill activity for the year ended December 31, 2019 and December 31, 2018 consisted of the following: 2019 2018 Balance at beginning of year $ 21,476,000 $ 2,403,000 Additions — 21,476,000 Impairment (4,100,000 ) (2,403,000 ) Balance at end of year $ 17,376,000 $ 21,476,000
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]	Intangible assets at December 31, 2019 were comprised of the following: Definite-lived Intangible Assets Amortization Period Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade Name 25 Years $ 250,000 $ (48,000 ) $ 202,000 Trademarks 10 Years 1,610,000 (315,000 ) 1,295,000 Non-competition Agreement 5 Years 1,810,000 (709,000 ) 1,101,000 Developed Technology 7 Years 4,420,000 (1,237,000 ) 3,183,000 Customer Relationships 10-12 Years 9,330,000 (1,647,000 ) 7,683,000 Total $ 17,420,000 $ (3,956,000 ) $ 13,464,000	Intangible assets at December 31, 2018 were comprised of the following: Definite-lived Intangible Assets Amortization Period Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade Name 25 Years $ 250,000 $ (38,000 ) $ 212,000 Trademarks 10 Years 1,610,000 (154,000 ) 1,456,000 Non-competition Agreement 5 Years 1,810,000 (347,000 ) 1,463,000 Developed Technology 7 Years 4,420,000 (605,000 ) 3,815,000 Customer Relationships 10-12 Years 9,330,000 (863,000 ) 8,467,000 Total $ 17,420,000 $ (2,007,000 ) $ 15,413,000
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	As of December 31, 2019, future intangible amortization were as follows: Amortization Expense 2020 $ 1,949,000 2021 1,949,000 2022 1,949,000 2023 1,602,000 2024 1,587,000 2025 and thereafter 4,428,000 Total intangibles as of December 31, 2019 13,464,000

Debt (Tables)

Debt (Tables)	12 Months Ended
Debt (Tables)	Dec. 31, 2019
Debt Disclosure [Abstract]
Components of long-term debt	Long-term debt consists of the following at: December 31, December 31, Term loans payable, interest at a variable rate (6.30% and 4.34% at December 31, 2019 and 2018, respectively) with monthly payments of interest and quarterly payments of principal through January 2023. $ 38,250,000 $ 41,625,000 Revolving loans, interest at a variable rate (6.04% and 4.39% at December 31, 2019 and 2018, respectively) 12,008,000 17,375,000 Total 50,258,000 59,000,000 Less deferred loan costs (807,000 ) (611,000 ) Less current portion (49,451,000 ) (3,230,000 ) Long-term debt $ — $ 55,159,000
Maturities of long-term debt	Annual maturities of long-term debt are as follows: 2020 $ 49,451,000

Stock Based Compensation (Table

Stock Based Compensation (Tables)	12 Months Ended
Stock Based Compensation (Tables)	Dec. 31, 2019
Stock based compensation:
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]	A summary of the Company's stock appreciation rights activity for the year ended December 31, 2019 is as follows: Number of Weighted Average Outstanding as of December 31, 2018 — $ — Granted 226,021 2.57 Exercised — — Forfeited (3,909 ) 2.57 Outstanding at the period ended December 31, 2019 222,112 $ 2.57 Exercisable at the period ended December 31, 2019 29,028 $ 2.57
Restricted Stock [Member]
Stock based compensation:
Status and changes of restricted stock	The following summarizes the status of Restricted Stock and changes during the years ended December 31: 2019 2018 2017 Number Wtd. Avg. Number of Shares Wtd. Avg. Grant Date Fair Value Number of Shares Wtd. Avg. Unvested - beginning of year 349,885 $ 10.62 141,095 $ 16.79 158,261 $ 14.55 Granted 135,268 7.65 315,429 11.32 84,643 19.17 Vested (117,828 ) 13.81 (82,067 ) 16.57 (95,717 ) 15.25 Forfeited (23,406 ) 15.02 (24,572 ) 16.91 (6,092 ) 17.93 Unvested - end of year 343,919 $ 9.37 349,885 $ 10.62 141,095 $ 16.79

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Components of provision for income taxes	Components of the provision for income taxes are as follows: 2019 2018 2017 Current: Federal - US $ — $ 11,000 $ 1,993,000 Foreign 685,000 1,023,000 613,000 State and local 20,000 14,000 24,000 705,000 1,048,000 2,630,000 Deferred: Federal 738,000 (1,355,000 ) (407,000 ) Foreign (1,824,000 ) (289,000 ) 52,000 State and local 26,000 (68,000 ) 11,000 (1,060,000 ) (1,712,000 ) (344,000 ) Provision (benefit) for income taxes $ (355,000 ) $ (664,000 ) $ 2,286,000
Reconciliation of income tax provision	A reconciliation of the income tax provision based on the federal statutory income tax rate to the Company's income tax provision for the years ended December 31 is as follows: 2019 2018 2017 Provision at US federal statutory rate $ (3,274,000 ) $ (1,145,000 ) $ 2,634,000 Adjustments for US tax law changes — — (185,000 ) Valuation allowance 3,267,000 — — Effect of foreign taxes (209,000 ) 213,000 (58,000 ) Adoption of ASC 606 — 236,000 — State and local tax expense (102,000 ) (54,000 ) 35,000 Other (37,000 ) 86,000 (140,000 ) Provision (benefit) for income taxes $ (355,000 ) $ (664,000 ) 2,286,000
Components of deferred tax assets	Deferred tax assets consist of the following at December 31: 2019 2018 Current asset (liability): Net operating loss carryforwards $ 4,928,000 $ 456,000 Interest limitation carryforwards 686,000 394,000 Accrued liabilities 477,000 568,000 Accounts receivable 108,000 521,000 Inventory 587,000 525,000 Other, net (190,000 ) (446,000 ) Total current asset 6,596,000 2,018,000 Non-current asset (liability): Property, plant, and equipment (5,580,000 ) (3,941,000 ) Post retirement benefits 2,090,000 1,848,000 Goodwill and finite-lived assets, net 1,973,000 994,000 Other, net 214,000 234,000 Total non-current liability (1,303,000 ) (865,000 ) Valuation allowance for deferred tax assets (3,267,000 ) $ — Total deferred tax asset (liability), net $ 2,026,000 $ 1,153,000

Post Retirement Benefits (Table

Post Retirement Benefits (Tables)	12 Months Ended
Post Retirement Benefits (Tables)	Dec. 31, 2019
Retirement Benefits [Abstract]
Components of multiemployer plans	Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status FIP/RP Status Pending/ Implemented Contributions of the Company Surcharge Imposed Expiration Date of Collective Bargaining Agreement 2019 2018 2019 2018 IAM National Pension Fund / National Pension Plan (A) 51-6031295 - 002 Red as of 12/31/18 Green as of 12/31/17 Implemented $971,000 $760,000 Yes 8/7/2022 Total Contributions: $971,000 $760,000 (A) The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2018. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week at $1.55 per hour from August 10, 2019 through August 6, 2022.
Reconciliation of changes in benefit obligation, amounts included in AOCI and assumptions used	The funded status of the Company's post retirement health and life insurance benefits plan as of December 31, 2019 and 2018 and reconciliation with the amounts recognized in the consolidated balance sheets are provided below: Post Retirement Benefits 2019 2018 Change in benefit obligation: Benefit obligation at January 1 $ 8,076,000 $ 9,050,000 Interest cost 285,000 277,000 Unrecognized loss (gain) 1,099,000 (910,000 ) Benefits paid, net (300,000 ) (341,000 ) Benefit obligation at December 31 $ 9,160,000 $ 8,076,000 Plan Assets — — Amounts recorded in accumulated other comprehensive income: Prior service credit $ (5,610,000 ) $ (6,106,000 ) Net loss 3,634,000 2,652,000 Total $ (1,976,000 ) $ (3,454,000 ) Weighted-average assumptions as of December 31: Discount rate used to determine benefit obligation and net periodic benefit cost 2.9 % 4.0 %
Components of postretirement expense	The components of expense for all of the Company's post retirement benefit plans for the years ended December 31: 2019 2018 2017 Pension expense: Multi-employer plan $ 971,000 $ 760,000 $ 647,000 Defined contribution plans 1,258,000 1,059,000 752,000 Total pension expense 2,229,000 1,819,000 1,399,000 Health and life insurance: Interest cost 285,000 277,000 298,000 Amortization of prior service costs (496,000 ) (496,000 ) (496,000 ) Amortization of net loss 117,000 171,000 149,000 Net periodic benefit cost (94,000 ) (48,000 ) (49,000 ) Total post retirement benefits expense $ 2,135,000 $ 1,771,000 $ 1,350,000
Effect of changing health care cost trend rate	The effect of changing the health care cost trend rate by one-percentage point for each future year is as follows: 1- Percentage Point Increase 1-Percentage Point Decrease Effect on total of service and interest cost components $ 39,000 $ (33,000 ) Effect on post retirement benefit obligation $ 1,169,000 $ (997,000 )
Estimated future benefit payments	The estimated future benefit payments of the health care plan for the next ten years are as follows: Year Postretirement Health Care Benefits Plan 2020 $ 1,233,000 2021 470,000 2022 497,000 2023 519,000 2024 496,000 2025 - 2029 2,438,000

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
Fair Value of Financial Instruments (Tables)	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following tables detail amounts related to our derivatives designated as hedging instruments as of December 31, 2019 : Fair Values of Derivatives Instruments Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value Foreign exchange contracts Prepaid expense other current assets $ 452,000 Accrued liabilities other $ — Notional contract values 15,358,000 — Interest rate swaps Other non-current assets — Other non-current liabilities 706,000 Notional swap values $ — $ 29,750,000 As of December 31, 2019 , the Company had foreign exchange contracts related to the Mexican Peso and the Candian Dollar with exchange rates ranging from 19.53 to 20.58 and 1.32 , respectively The following tables detail amounts related to our derivatives designated as hedging instruments as of December 31, 2018 : Fair Values of Derivatives Instruments Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value Foreign exchange contracts Prepaid expense other current assets — Accrued liabilities other $ 750,000 Notional contract values — $ 27,588,000 Interest rate swaps Other non-current assets — Other non-current liabilities $ 65,000 Notional swap values — $ 32,375,000 As of December 31, 2018 , the Company had foreign exchange contracts related to the Mexican Peso and the Canadian Dollar with exchange rates ranging from 19.52 to 20.47 and 1.28 to 1.33 , respectively.
Effect of derivative instruments on income	The following tables summarize the amount of unrealized / realized gain and loss recognized in Accumulated Comprehensive Income (AOCI) for the years ended December 31, 2019 , 2018 and 2017 : Derivatives in subtopic 815-20 Cash Flow Hedging Relationship Amount of Unrealized Gain or (Loss) Recognized in Accumulated other Comprehensive Income on Derivative Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (A) Amount of Realized Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income 2019 2018 2017 2019 2018 2017 Foreign exchange contracts $1,499,000 $(385,000) $517,000 Cost of goods sold $272,000 $68,000 $445,000 Selling, general and administrative expense $25,000 $— $67,000 Interest rate swaps $(708,000) $(223,000) $— Interest Expense $(67,000) $(159,000) $—

AOCI (Tables)

AOCI (Tables)	12 Months Ended
AOCI (Tables)	Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of accumulated other comprehensive income	Hedging Derivative Activities Post Retirement Benefit Plan Items (A) Total 2018: Balance at January 1, 2018 $ (197,000 ) $ 2,267,000 $ 2,070,000 Other comprehensive income before reclassifications (608,000 ) 910,000 302,000 Amounts reclassified from accumulated other comprehensive income 91,000 (325,000 ) (234,000 ) Income tax (expense) benefit 102,000 (123,000 ) (21,000 ) Balance at December 31, 2018 $ (612,000 ) $ 2,729,000 $ 2,117,000 2019: Balance at January 1, 2019 $ (612,000 ) $ 2,729,000 $ 2,117,000 Other comprehensive income before reclassifications 791,000 (1,102,000 ) (311,000 ) Amounts reclassified from accumulated other comprehensive income (230,000 ) (379,000 ) (609,000 ) Income tax (expense) benefit (140,000 ) 313,000 173,000 Balance at December 31, 2019 $ (191,000 ) $ 1,561,000 $ 1,370,000

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
Quarterly Results of Operations (Unaudited) (Tables)	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly results of operations	The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2019 , 2018 and 2017 . 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Year 2019: Product sales $ 71,451,000 $ 75,440,000 $ 67,511,000 $ 54,585,000 $ 268,987,000 Tooling sales 815,000 5,807,000 7,144,000 1,537,000 15,303,000 Net sales 72,266,000 81,247,000 74,655,000 56,122,000 284,290,000 Gross margin 3,149,000 8,491,000 6,484,000 3,382,000 21,506,000 Operating income (loss) (4,017,000 ) 1,267,000 (4,657,000 ) (4,121,000 ) (11,528,000 ) Net income (loss) (3,845,000 ) 209,000 (6,125,000 ) (5,462,000 ) (15,223,000 ) Net income (loss) per common share: Basic (1) $ (0.49 ) $ 0.03 $ (0.78 ) $ (0.69 ) $ (1.94 ) Diluted (1) $ (0.49 ) $ 0.03 $ (0.78 ) $ (0.69 ) $ (1.94 ) 2018: Product sales $ 59,712,000 $ 65,225,000 $ 62,305,000 $ 68,975,000 $ 256,217,000 Tooling sales 3,334,000 3,376,000 2,371,000 4,187,000 13,268,000 Net sales 63,046,000 68,601,000 64,676,000 73,162,000 269,485,000 Gross margin 7,885,000 7,897,000 4,862,000 6,497,000 27,141,000 Operating income (loss) 1,125,000 1,418,000 (1,487,000 ) (4,156,000 ) (3,100,000 ) Net income (loss) 518,000 445,000 (1,803,000 ) (3,942,000 ) (4,782,000 ) Net income (loss) per common share: Basic (1) $ 0.07 $ 0.06 $ (0.23 ) $ (0.51 ) $ (0.62 ) Diluted (1) $ 0.07 $ 0.06 $ (0.23 ) $ (0.51 ) $ (0.62 ) 2017: Product sales $ 36,336,000 $ 36,794,000 $ 37,593,000 $ 37,900,000 $ 148,623,000 Tooling sales 410,000 10,574,000 901,000 1,165,000 13,050,000 Net sales 36,746,000 47,368,000 38,494,000 39,065,000 161,673,000 Gross margin 6,479,000 7,341,000 5,752,000 5,059,000 24,631,000 Operating income 2,554,000 3,173,000 1,394,000 820,000 7,941,000 Net income 1,688,000 2,162,000 855,000 754,000 5,459,000 Net income per common share: Basic (1) $ 0.22 $ 0.28 $ 0.11 $ 0.10 $ 0.71 Diluted (1) $ 0.22 $ 0.28 $ 0.11 $ 0.10 $ 0.70 (1) Sum of the quarters may not sum to total year due to rounding.

Basis of Presentation (Details)

Basis of Presentation (Details)	12 Months Ended
Basis of Presentation (Details)	Dec. 31, 2019Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of production facilities operated	7
Number of reportable segments	1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended	12 Months Ended
	May 29, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 12, 2020
Payments to Acquire Property, Plant, and Equipment		$ 7,460,000	$ 5,801,000	$ 4,259,000
Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 40,000,000
Debt Instrument, Basis Spread on Variable Rate		450.00%
Maximum [Member] \| Line of Credit [Member]
Debt Instrument, Basis Spread on Variable Rate		450.00%
Subsequent Event [Member] \| Amended Forbearance Agreement [Member] \| Additional Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 5,000,000
Subsequent Event [Member] \| Amended Forbearance Agreement [Member] \| Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 25,000,000
Debt Instrument, Basis Spread on Variable Rate	650.00%
Subsequent Event [Member] \| Maximum [Member] \| Amended Forbearance Agreement [Member]
Payments to Acquire Property, Plant, and Equipment	$ 3,500,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Cash and Cash Equivalents (Details)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Accounting Policies [Abstract]
Number of Banks in Which Cash is Held	2
Cash and cash equivalents	$ 1,856,000	$ 1,891,000	$ 26,780,000	$ 28,285,000

Summary of Significant Accoun_6

Summary of Significant Accounting Policies Accounts Receivable (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 50,000	$ 25,000
Accounts Receivable, Allowance for Chargebacks	$ 476,000	$ 2,344,000

Summary of Significant Accoun_7

Summary of Significant Accounting Policies Inventory (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Inventory Valuation Reserves	$ 898,000	$ 957,000

Summary of Significant Accoun_8

Summary of Significant Accounting Policies Contracts with Customers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 1,240,000	$ 449,000

Summary of Significant Accoun_9

Summary of Significant Accounting Policies Property, Plant and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant & Equipment:
Depreciation expense	$ 8,187,000	$ 7,361,000	$ 6,190,000
Asset Impairment Charges	$ 0	$ 0	$ 0
Land improvements
Property, Plant & Equipment:
Useful life	20 years
Buildings and improvements \| Minimum [Member]
Property, Plant & Equipment:
Useful life	20 years
Buildings and improvements \| Maximum [Member]
Property, Plant & Equipment:
Useful life	40 years
Machinery and equipment \| Minimum [Member]
Property, Plant & Equipment:
Useful life	3 years
Machinery and equipment \| Maximum [Member]
Property, Plant & Equipment:
Useful life	15 years
Tools, dies and patterns \| Minimum [Member]
Property, Plant & Equipment:
Useful life	3 years
Tools, dies and patterns \| Maximum [Member]
Property, Plant & Equipment:
Useful life	5 years

Summary of Significant Accou_10

Summary of Significant Accounting Policies Long-Lived Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 16, 2018
Business Acquisition [Line Items]
Asset Impairment Charges	$ 0	$ 0	$ 0
Horizon Plastics [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				$ 16,770,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				$ 12,994,000

Summary of Significant Accou_11

Summary of Significant Accounting Policies Goodwill (Details)	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Accounting Policies [Abstract]
Number of Reporting Units	2
Goodwill, Impairment Loss	$ 4,100,000	$ 2,403,000	$ 0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		23.00%

Summary of Significant Accou_12

Summary of Significant Accounting Policies Self Insurance (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Self Insurance Reserve	$ 1,203,000	$ 960,000

Summary of Significant Accou_13

Summary of Significant Accounting Policies Post-Retirement Benefits (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Postemployment Benefits Liability	$ 9,160,000	$ 8,076,000

Summary of Significant Accou_14

Summary of Significant Accounting Policies Concentration Risk (Details)	12 Months Ended
	Dec. 31, 2019USD ($)EmployeeCustomer	Dec. 31, 2018	Dec. 31, 2017
Concentration risk:
Current liabilities exceeding current assets \| $	$ 22,609,000
Sales Revenue, Total [Member] \| Customer Concentration Risk [Member]
Concentration risk:
Number of major customers, Sales \| Customer	4
Concentration Risk, Percentage	62.00%	65.00%	65.00%
Sales Revenue, Total [Member] \| Geographic concentration risk \| Mexico and Canada [Member]
Concentration risk:
Concentration Risk, Percentage	34.00%	32.00%	36.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration risk:
Concentration Risk, Accounts Receivable, Number of major customers \| Customer	4
Concentration Risk, Percentage	49.00%	64.00%
Number of employees, geographic area \| Labor force concentration risk
Concentration risk:
Concentration risk, number of employees	1,821
Number of employees, geographic area \| Labor force concentration risk \| MEXICO
Concentration risk:
Concentration risk, number of employees	795
Number of employees, geographic area \| Labor force concentration risk \| UNITED STATES
Concentration risk:
Concentration risk, number of employees	764
Number of employees, geographic area \| Labor force concentration risk \| CANADA
Concentration risk:
Concentration risk, number of employees	262
Workforce subject to collective bargaining arrangements \| Unionized employees concentration risk \| International Association of Machinists and Aerospace Workers
Concentration risk:
Concentration risk, number of employees	341
Workforce subject to collective bargaining arrangements \| Unionized employees concentration risk \| Sindicato de Jorneleros y Obreros
Concentration risk:
Concentration risk, number of employees	635
Workforce subject to collective bargaining arrangements \| Unionized employees concentration risk \| United Food & Commercial Workers Canada [Member] [Member]
Concentration risk:
Concentration risk, number of employees	216
Workforce subject to collective bargaining arrangements \| Unionized employees concentration risk \| Sindicato de trabajadores de la industria metalica y del comercio del estado de Nuevo Leon Presidente Benito Juarez Garcia C.T.M. [Member]
Concentration risk:
Concentration risk, number of employees	35

Summary of Significant Accou_15

Summary of Significant Accounting Policies Research and Development (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Research and Development Expense	$ 1,171,000	$ 1,032,000	$ 848,000

Summary of Significant Accou_16

Summary of Significant Accounting Policies Foreign Currency Adjustments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Net foreign translation and transaction activity	$ 229,000	$ 88,000	$ 30,000

Summary of Significant Accou_17

Summary of Significant Accounting Policies New Accounting Pronouncement (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0
Operating Lease, Right-of-Use Asset	4,484,000	$ 4,490,000	$ 0
Operating Lease, Liability	4,423,000	$ 4,428,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (162,000)

Net Income per Common Share (De

Net Income per Common Share (Details) - USD ($)	3 Months Ended												12 Months Ended
Net Income per Common Share (Details) - USD ($)	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income (loss)	$ (5,462,000)	$ (6,125,000)	$ 209,000	$ (3,845,000)	$ (3,942,000)	$ (1,803,000)	$ 445,000	$ 518,000	$ 754,000	$ 855,000	$ 2,162,000	$ 1,688,000	$ (15,223,000)	$ (4,782,000)	$ 5,459,000
Weighted average common shares outstanding — basic													7,830,000	7,750,000	7,690,000
Effect of dilutive securities (in shares)													0	0	57,000
Weighted average common and potentially issuable common shares outstanding — diluted (in shares)													7,830,000	7,750,000	7,747,000
Basic net income per common share (USD per share)	$ (0.69)	$ (0.78)	$ 0.03	$ (0.49)	$ (0.51)	$ (0.23)	$ 0.06	$ 0.07	$ 0.10	$ 0.11	$ 0.28	$ 0.22	$ (1.94)	$ (0.62)	$ 0.71
Diluted net income per common share (USD per share)	$ (0.69)	$ (0.78)	$ 0.03	$ (0.49)	$ (0.51)	$ (0.23)	$ 0.06	$ 0.07	$ 0.10	$ 0.11	$ 0.28	$ 0.22	$ (1.94)	$ (0.62)	$ 0.70

Major Customers (Details)

Major Customers (Details)	3 Months Ended												12 Months Ended
Major Customers (Details)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2019USD ($)Customer	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Major customers:
Total sales	$ 56,122,000	$ 74,655,000	$ 81,247,000	$ 72,266,000	$ 73,162,000	$ 64,676,000	$ 68,601,000	$ 63,046,000	$ 39,065,000	$ 38,494,000	$ 47,368,000	$ 36,746,000	$ 284,290,000	$ 269,485,000	$ 161,673,000
Navistar
Major customers:
Total sales													56,882,000	55,153,000	39,768,000
Volvo [Member]
Major customers:
Total sales													48,749,000	46,160,000	35,716,000
Paccar
Major customers:
Total sales													46,068,000	44,452,000	29,413,000
UFP [Member]
Major customers:
Total sales													25,395,000	28,146,000	0
Other customers
Major customers:
Total sales													$ 107,196,000	95,574,000	56,776,000
Customer Concentration Risk [Member] \| Sales Revenue, Total [Member]
Major customers:
Number of major customers, Sales \| Customer													4
Product [Member]
Major customers:
Total sales	54,585,000	67,511,000	75,440,000	71,451,000	68,975,000	62,305,000	65,225,000	59,712,000	37,900,000	37,593,000	36,794,000	36,336,000	$ 268,987,000	256,217,000	148,623,000
Product [Member] \| Navistar
Major customers:
Total sales													54,798,000	52,347,000	39,609,000
Product [Member] \| Volvo [Member]
Major customers:
Total sales													48,487,000	46,063,000	27,627,000
Product [Member] \| Paccar
Major customers:
Total sales													44,543,000	38,027,000	26,481,000
Product [Member] \| UFP [Member]
Major customers:
Total sales													25,395,000	27,906,000	0
Product [Member] \| Other customers
Major customers:
Total sales													95,764,000	91,874,000	54,906,000
Service [Member]
Major customers:
Total tooling sales	$ 1,537,000	$ 7,144,000	$ 5,807,000	$ 815,000	$ 4,187,000	$ 2,371,000	$ 3,376,000	$ 3,334,000	$ 1,165,000	$ 901,000	$ 10,574,000	$ 410,000	15,303,000	13,268,000	13,050,000
Service [Member] \| Navistar
Major customers:
Total tooling sales													2,084,000	2,806,000	159,000
Service [Member] \| Volvo [Member]
Major customers:
Total tooling sales													262,000	97,000	8,089,000
Service [Member] \| Paccar
Major customers:
Total tooling sales													1,525,000	6,425,000	2,932,000
Service [Member] \| UFP [Member]
Major customers:
Total tooling sales													0	240,000	0
Service [Member] \| Other customers
Major customers:
Total tooling sales													$ 11,432,000	$ 3,700,000	$ 1,870,000

Foreign Operations (Details)

Foreign Operations (Details) - USD ($)	3 Months Ended												12 Months Ended
Foreign Operations (Details) - USD ($)	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign operations:
Total sales	$ 56,122,000	$ 74,655,000	$ 81,247,000	$ 72,266,000	$ 73,162,000	$ 64,676,000	$ 68,601,000	$ 63,046,000	$ 39,065,000	$ 38,494,000	$ 47,368,000	$ 36,746,000	$ 284,290,000	$ 269,485,000	$ 161,673,000
Property, plant and equipment — net	79,206,000				80,657,000								79,206,000	80,657,000
UNITED STATES
Foreign operations:
Total sales													178,953,000	181,207,000	103,513,000
Property, plant and equipment — net	39,132,000				37,778,000								39,132,000	37,778,000
MEXICO
Foreign operations:
Total sales													79,761,000	74,029,000	52,496,000
Property, plant and equipment — net	31,865,000				34,155,000								31,865,000	34,155,000
CANADA
Foreign operations:
Total sales													16,988,000	12,494,000	5,664,000
Property, plant and equipment — net	$ 8,209,000				$ 8,724,000								8,209,000	8,724,000
Other Geographical Location [Member]
Foreign operations:
Total sales													$ 8,588,000	$ 1,755,000	$ 0

Property, Plant & Equipment (De

Property, Plant & Equipment (Details) - USD ($)	12 Months Ended
Property, Plant & Equipment (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant & Equipment:
Property, plant and equipment	$ 170,881,000	$ 164,145,000
Accumulated depreciation	(91,675,000)	(83,488,000)
Property, plant and equipment — net	79,206,000	80,657,000
Commitments for capital expenditures in progress recorded on balance sheet	336,000	3,461,000
Capital Expenditures Incurred but Not yet Paid	158,000	871,000	$ 278,000
Land and land improvements
Property, Plant & Equipment:
Property, plant and equipment	6,009,000	6,009,000
Buildings
Property, Plant & Equipment:
Property, plant and equipment	43,375,000	43,042,000
Machinery and equipment
Property, Plant & Equipment:
Property, plant and equipment	118,366,000	108,661,000
Tools, dies and patterns
Property, Plant & Equipment:
Property, plant and equipment	1,516,000	1,419,000
Asset under Construction [Member]
Property, Plant & Equipment:
Property, plant and equipment	$ 1,615,000	$ 5,014,000

Leases (Details)

Leases (Details) - USD ($)	12 Months Ended
Leases (Details) - USD ($)	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lease, Cost [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 1,433,000		$ 1,291,000
Operating Lease, Payments	$ 1,455,000
Operating Lease, Weighted Average Discount Rate, Percent	4.94%
Operating Lease, Weighted Average Remaining Lease Term	4 years
Operating, Lease, Right-of-Use Asset, Current	$ 0
Operating Lease, Right-of-Use Asset, Noncurrent	4,484,000
Operating Lease, Right-of-Use Asset	4,484,000	$ 4,490,000	0
Operating Lease, Liability, Current	(1,304,000)
Operating Leases, Rent Expense, Net	1,430,000
Operating Lease, Liability, Noncurrent	3,119,000		0
Operating Lease, Liability	4,423,000	$ 4,428,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,174,000		1,099,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	1,102,000		838,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,000,000		766,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	530,000		661,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five			331,000
Lessee, Operating Lease, Liability, Payments, Due	5,239,000		$ 4,986,000
Lessee, Operating Lease, Imputed Interest	(816,000)
Lessee, Operating Lease, Discounted Lease Payments	$ 4,423,000

Business Combination (Details)

Business Combination (Details) - USD ($)	12 Months Ended
Business Combination (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Jan. 16, 2018
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Goodwill			$ 0	$ 21,476,000
Horizon Plastics [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Acquisitions, Gross Purchase Price				62,457,000
Business Combination, Reduction in Purchase Price	$ 548,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables				7,677,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory				6,523,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other				832,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				12,994,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Goodwill				21,476,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				16,770,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable				(3,181,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other				(86,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				$ 63,005,000
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	1,289,000	$ 596,000
Horizon Plastics [Member] \| Selling, General and Administrative Expenses [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	$ 1,289,000	$ 596,000

Business Combination Business C

Business Combination Business Combination, Intangibles Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Jan. 16, 2018
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Horizon Plastics [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 16,770,000
Horizon Plastics [Member] \| Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		1,810,000
Finite-Lived Intangible Asset, Useful Life	5 years
Horizon Plastics [Member] \| Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		1,610,000
Finite-Lived Intangible Asset, Useful Life	10 years
Horizon Plastics [Member] \| Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		4,420,000
Finite-Lived Intangible Asset, Useful Life	7 years
Horizon Plastics [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 8,930,000
Finite-Lived Intangible Asset, Useful Life	12 years

Business Combination Business_2

Business Combination Business Combination, Pro Forma Information (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total sales	$ 56,122,000	$ 74,655,000	$ 81,247,000	$ 72,266,000	$ 73,162,000	$ 64,676,000	$ 68,601,000	$ 63,046,000	$ 39,065,000	$ 38,494,000	$ 47,368,000	$ 36,746,000	$ 284,290,000	$ 269,485,000	$ 161,673,000
Horizon Plastics [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total sales														272,153,000	222,015,000
Business Acquisition, Pro Forma Net Income (Loss)														$ (3,788,000)	$ 8,121,000
Business Acquisition, Pro Forma Earnings Per Share, Basic														$ (0.49)	$ 1.06
Business Acquisition, Pro Forma Earnings Per Share, Diluted														$ (0.49)	$ 1.05

Business Combination Business_3

Business Combination Business Combination, Pro Forma Adjustment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Depreciation expense	$ 8,187,000	$ 7,361,000	$ 6,190,000
Amortization of Intangible Assets	1,949,000	1,869,000	50,000
Net interest expense	4,144,000	2,394,000	245,000
Total income taxes	$ (355,000)	(664,000)	2,286,000
Horizon Plastics [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Depreciation expense		55,000	50,000
Amortization of Intangible Assets		78,000	1,876,000
Net interest expense		208,000	1,705,000
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed		(1,289,000)	(596,000)
Total income taxes		$ 253,000	$ (880,000)

Goodwill and Intangible Asset_3

Goodwill and Intangible Asset Disclosure (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 16, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 1,949,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,949,000
Goodwill [Roll Forward]
Beginning Goodwill	21,476,000	$ 2,403,000
Additions	0			$ 21,476,000
Goodwill, Impairment Loss	(4,100,000)	(2,403,000)	$ 0
Ending Goodwill	17,376,000	$ 21,476,000	$ 2,403,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		23.00%
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,949,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,602,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,587,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 4,428,000

Goodwill and Intangible Asset_4

Goodwill and Intangible Asset Disclosure Intangible Assets by Major Asset Class (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss	$ 4,100,000	$ 2,403,000	$ 0
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,949,000
Finite-Lived Intangible Assets, Gross	17,420,000	17,420,000
Finite-Lived Intangible Assets, Accumulated Amortization	(3,956,000)	(2,007,000)
Finite-Lived Intangible Assets, Net	13,464,000	15,413,000
Amortization of Intangible Assets	1,949,000	$ 1,869,000	$ 50,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,949,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,602,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,587,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		23.00%
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,330,000	$ 9,330,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,647,000)	(863,000)
Finite-Lived Intangible Assets, Net	7,683,000	$ 8,467,000
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		25 years
Finite-Lived Intangible Assets, Gross		$ 250,000
Finite-Lived Intangible Assets, Accumulated Amortization	(48,000)	(38,000)
Finite-Lived Intangible Assets, Net	202,000	$ 212,000
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		10 years
Finite-Lived Intangible Assets, Gross		$ 1,610,000
Finite-Lived Intangible Assets, Accumulated Amortization	(315,000)	(154,000)
Finite-Lived Intangible Assets, Net	1,295,000	$ 1,456,000
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		5 years
Finite-Lived Intangible Assets, Gross		$ 1,810,000
Finite-Lived Intangible Assets, Accumulated Amortization	(709,000)	(347,000)
Finite-Lived Intangible Assets, Net	1,101,000	$ 1,463,000
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		7 years
Finite-Lived Intangible Assets, Gross		$ 4,420,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,237,000)	(605,000)
Finite-Lived Intangible Assets, Net	$ 3,183,000	$ 3,815,000
Minimum [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years	10 years
Maximum [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years	12 years

Debt Debt (Details)

Debt Debt (Details) - USD ($)	3 Months Ended	10 Months Ended	12 Months Ended
Debt Debt (Details) - USD ($)	May 29, 2020	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 12, 2020	Nov. 22, 2019	Mar. 14, 2019
Debt:
Long-term Debt, Current Maturities		$ 37,443,000	$ 37,443,000	$ 3,230,000
Long-term Debt		0	0	37,784,000
Line of Credit, Current		12,008,000	12,008,000	0
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums		(807,000)	(807,000)	(611,000)
Long-term Line of Credit		0	0	17,375,000
Long-term Debt, Gross		50,258,000	50,258,000	59,000,000
Purchase Price Funded with Debt		49,500,000	49,500,000
Current portion of long-term debt		(49,451,000)	(49,451,000)	(3,230,000)
Long-term debt		0	0	55,159,000
Current liabilities exceeding current assets		22,609,000	22,609,000
Letters of Credit Outstanding, Amount		$ 160,000	$ 160,000
Percent of subsidiary stock not security for financing		65.00%	65.00%
Payments to Acquire Property, Plant, and Equipment			$ 7,460,000	5,801,000	$ 4,259,000
Interest Rate Swap Domestic [Member]
Debt:
Debt Instrument, Face Amount		$ 25,000,000	25,000,000
Interest Rate Swap Foreign [Member]
Debt:
Debt Instrument, Face Amount		10,000,000	10,000,000
Term Loan [Member]
Debt:
Long-term Debt, Current Maturities		$ 38,250,000	$ 38,250,000
Long-term Debt				$ 41,625,000
Debt Instrument, Interest Rate, Stated Percentage		6.30%	6.30%	4.34%
Line of Credit [Member]
Debt:
Long-term Line of Credit				$ 17,375,000
Debt Instrument, Interest Rate, Stated Percentage		6.04%	6.04%	4.39%
Interest Rate Swap [Member]
Debt:
Debt Instrument, Face Amount		$ 35,000,000	$ 35,000,000
Derivative, Fixed Interest Rate		2.49%	2.49%
Debt Instrument, Description of Variable Rate Basis			30 day LIBOR
Term Loan Domestic [Member]
Debt:
Debt Instrument, Face Amount		$ 32,000,000	$ 32,000,000
Existing Term Loan [Member]
Debt:
Long-term Debt				$ 6,750,000
Debt Instrument, Face Amount		49,451,000	$ 49,451,000
Term Loan [Member]
Debt:
Repayment term			5 years
Debt Instrument, Face Amount		45,000,000	$ 45,000,000
Debt Instrument, Description of Variable Rate Basis			30 day LIBOR
Debt Instrument, Basis Spread on Variable Rate			450.00%
Domestic Line of Credit [Member]
Debt:
Long-term Line of Credit		2,000,000	$ 2,000,000
Line of Credit [Member]
Debt:
Line of Credit, Current		12,008,000	12,008,000
Long-term Line of Credit		12,008,000	12,008,000
Line of Credit Facility, Maximum Borrowing Capacity		40,000,000	$ 40,000,000
Debt Instrument, Description of Variable Rate Basis			30 day LIBOR
Debt Instrument, Basis Spread on Variable Rate			450.00%
Line of Credit [Member] \| First Amendment [Member]
Debt:
Line of Credit Facility, Maximum Borrowing Capacity								$ 32,500,000
Line of Credit [Member] \| Forbearance Agreement [Member]
Debt:
Line of Credit Facility, Maximum Borrowing Capacity		28,000,000	$ 28,000,000				$ 28,000,000
Foreign Line of Credit [Member]
Debt:
Long-term Line of Credit		2,500,000	2,500,000
Line of Credit Facility, Maximum Borrowing Capacity		10,000,000	10,000,000
Term Loan Foreign [Member]
Debt:
Debt Instrument, Face Amount		13,000,000	13,000,000
Maximum [Member]
Debt:
Letters of Credit Outstanding, Amount		250,000	250,000
Maximum [Member] \| First Amendment [Member]
Debt:
Payments to Acquire Property, Plant, and Equipment		$ 7,500,000	$ 12,500,000
Maximum [Member] \| Term Loan [Member]
Debt:
Debt Instrument, Basis Spread on Variable Rate			450.00%
Maximum [Member] \| Line of Credit [Member]
Debt:
Debt Instrument, Basis Spread on Variable Rate			450.00%
Minimum [Member] \| Term Loan [Member]
Debt:
Debt Instrument, Basis Spread on Variable Rate			225.00%
Minimum [Member] \| Line of Credit [Member]
Debt:
Debt Instrument, Basis Spread on Variable Rate			225.00%
Liability [Member]
Debt:
Description of Location of Foreign Currency Derivatives on Balance Sheet			Accrued liabilities other	Accrued liabilities other
Subsequent Event [Member] \| Additional Line of Credit [Member] \| Amended Forbearance Agreement [Member]
Debt:
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000
Subsequent Event [Member] \| Line of Credit [Member]
Debt:
Debt Instrument, Description of Variable Rate Basis	LIBOR
Subsequent Event [Member] \| Line of Credit [Member] \| Amended Forbearance Agreement [Member]
Debt:
Line of Credit Facility, Maximum Borrowing Capacity						$ 25,000,000
Debt Instrument, Basis Spread on Variable Rate	650.00%
Subsequent Event [Member] \| Maximum [Member] \| Amended Forbearance Agreement [Member]
Debt:
Payments to Acquire Property, Plant, and Equipment	$ 3,500,000

Debt Annual Maturities of Long-

Debt Annual Maturities of Long-Term Debt (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Schedule of Long-Term Debt Maturities [Line Items]
Long-term Debt	$ 0	$ 37,784,000
Term Loan [Member]
Schedule of Long-Term Debt Maturities [Line Items]
2019	$ 49,451,000
Long-term Debt		$ 41,625,000

Stock Based Compensation (Detai

Stock Based Compensation (Details) - USD ($)	12 Months Ended
Stock Based Compensation (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock based compensation:
Employee Service Shared-based Compensation, Tax Benefit from Compensation Expense, Restricted Stock	$ 110,000	$ 33,000	$ (126,000)
Restricted stock, weighted average grant date fair value:
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 10
2006 Plan
Stock based compensation:
Number of shares authorized for grant	3,000,000
Shares Remaining for Issuance	744,697
Stock Appreciation Rights (SARs) [Member]
Stock based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	222,112	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 2.57	$ 0
Restricted stock, weighted average grant date fair value:
Total unrecognized compensation expense	$ 386,000	$ 0
Weighted average period for recognition of compensation expense	2 years 4 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 4 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	226,021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 2.57
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 2.57
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	(3,909)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$ 2.57
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	29,028
Stock Appreciation Rights (SARs) [Member] \| Selling, General and Administrative Expenses [Member]
Stock based compensation:
Stock based compensation expense	$ 185,000	$ 0
Restricted Stock [Member]
Restricted stock, nonvested:
Restricted stock, nonvested, beginning of year (in shares)	349,885	141,095	158,261
Restricted stock, grants in period (in shares)	135,268	315,429	84,643
Restricted stock, vested in period (in shares)	(117,828)	(82,067)	(95,717)
Restricted stock, forfeitures in period (in shares)	(23,406)	(24,572)	(6,092)
Restricted stock, nonvested, end of year (in shares)	343,919	349,885	141,095
Restricted stock, weighted average grant date fair value:
Restricted stock, nonvested, weighted average grant date fair value, beginning of period (USD per share)	$ 10.62	$ 16.79	$ 14.55
Restricted stock, grants in period, weighted average grant date fair value (USD per share)	7.65	11.32	19.17
Restricted stock, vested in period, weighted average grant date fair value (USD per share)	13.81	16.57	15.25
Restricted stock, forfeitures in period, weighted average grant date fair value (USD per share)	15.02	16.91	17.93
Restricted stock, nonvested, weighted average grant date fair value, end of period (USD per share)	$ 9.37	$ 10.62	$ 16.79
Total unrecognized compensation expense	$ 1,923,000	$ 2,598,000
Weighted average period for recognition of compensation expense	1 year 10 months
Shares Paid for Tax Withholding for Share Based Compensation	16,047	17,180	19,533
Restricted Stock [Member] \| 2006 Plan
Stock based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Restricted Stock [Member] \| Selling, General and Administrative Expenses [Member]
Stock based compensation:
Stock based compensation expense	$ 1,379,000	$ 1,774,000	$ 1,331,000
Equity [Member]
Stock based compensation:
Employee Service Shared-based Compensation, Tax Benefit from Compensation Expense, Restricted Stock			$ (126,000)

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
Income Taxes (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets, Gross	$ 5,293,000
Deferred Tax Charge (Benefit) Adjustment			$ (484,000)
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2039
Tax Credit Carryforward, Amount	$ 3,120,000
Operating Loss Carryforwards, Valuation Allowance		$ 0
Unrecognized Tax Benefits	0	0
Transitional Tax, net			299,000
Employee Service Shared-based Compensation, Tax Benefit from Compensation Expense, Restricted Stock	(110,000)	(33,000)	126,000
Current:
Federal - US	0	11,000	1,993,000
Federal - Foreign	685,000	1,023,000	613,000
State and local	20,000	14,000	24,000
Current income tax expense (benefit)	705,000	1,048,000	2,630,000
Deferred:
Federal	738,000	(1,355,000)	(407,000)
Deferred Foreign Income Tax Expense (Benefit)	(1,824,000)	(289,000)	52,000
State and local	26,000	(68,000)	11,000
Deferred income tax expense (benefit)	(1,060,000)	(1,712,000)	(344,000)
Total income taxes	(355,000)	(664,000)	2,286,000
Reconciliation of income tax provision:
Provision at federal statutory rate - US	(3,274,000)	(1,145,000)	2,634,000
Deferred Tax Charge (Benefit) Adjustment, net	0	0	(185,000)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	3,267,000	0	0
Effect of foreign taxes	(209,000)	213,000	(58,000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	0	236,000	0
State and local tax expense	(102,000)	(54,000)	35,000
Other	(37,000)	86,000	(140,000)
Components of deferred tax assets (liabilities):
Deferred Tax Assets, Tax Credit Carryforwards, Other	686,000	394,000
Accrued liabilities	477,000	568,000
Accounts receivable	108,000	521,000
Inventory	587,000	525,000
Other, net	(190,000)	(446,000)
Deferred Tax Assets, Gross, Current	6,596,000	2,018,000
Property, plant, and equipment	(5,580,000)	(3,941,000)
Post retirement benefits	2,090,000	1,848,000
Deferred Tax Assets, Goodwill and Intangible Assets	1,973,000	994,000
Other, net	214,000	234,000
Deferred Tax Liabilities, Gross, Noncurrent	1,303,000	865,000
Deferred Tax Assets, Valuation Allowance	(3,267,000)	0
Deferred Tax Assets, Operating Loss Carryforwards	4,928,000	456,000
Deferred Tax Assets, Net	2,026,000	$ 1,153,000
Equity [Member]
Employee Service Shared-based Compensation, Tax Benefit from Compensation Expense, Restricted Stock			$ 126,000
UNITED STATES
Operating Loss Carryforwards	17,994,000
Deferred Tax Assets, Gross	3,267,000
CANADA
Operating Loss Carryforwards	5,772,000
Deferred Tax Assets, Gross	1,555,000
MEXICO
Deferred Tax Assets, Gross	471,000
Future Tax Period [Member] \| CANADA
Operating Loss Carryforwards	2,116,000
Carryback [Member] \| CANADA
Operating Loss Carryforwards	$ 3,656,000

Post Retirement Benefits - Mult

Post Retirement Benefits - Multiemployer Plans (Details)	12 Months Ended
Post Retirement Benefits - Multiemployer Plans (Details)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Aug. 06, 2017$ / h
Multiemployer plans:
Certified zone status, percent funded limit for red status	65.00%
Certified zone status, percent funded limit for yellow status	80.00%
Certified zone status, percent funded limit for green status	80.00%
Multi-employer plan contributions \| $	$ 971,000	$ 760,000
Multiemployer plan, postretirement benefit
Multiemployer plans:
Maximum percentage of total contribution	5.00%
Multiemployer plans, collective-bargaining arrangement, maximum hours of work per week for employer contribution	40 hours
Multiemployer plans, collective-bargaining arrangement, rate of employer contribution \| $ / h			1.55

Post Retirement Benefits - Chan

Post Retirement Benefits - Change in Benefit Obligation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation:
Interest cost	$ 285,000	$ 277,000	$ 298,000
Postretirement benefits
Change in benefit obligation:
Benefit obligation at beginning of year	8,076,000	9,050,000
Interest cost	285,000	277,000
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(1,099,000)	(910,000)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	(1,976,000)	(3,454,000)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	300,000	341,000
Benefit obligation at beginning of year	9,160,000	8,076,000	$ 9,050,000
Plan Assets	0	0
Amounts recorded in accumulated other comprehensive income:
Prior service credit	(5,610,000)	(6,106,000)
Net loss	3,634,000	2,652,000
Total	$ (1,976,000)	$ (3,454,000)
Weighted-average assumptions:
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.90%	4.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.00%	6.20%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%

Post Retirement Benefits - Post

Post Retirement Benefits - Post Retirement Benefits Expense (Details) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension, health and life insurance expense:
Pension Cost (Reversal of Cost)	[1]	$ 971,000	$ 760,000	$ 647,000
Other Postretirement Benefits Cost (Reversal of Cost)		1,258,000	1,059,000	752,000
Pension and Other Postretirement Benefits Cost (Reversal of Cost)		2,229,000	1,819,000	1,399,000
Interest cost		285,000	277,000	298,000
Amortization of prior service costs		(496,000)	(496,000)	(496,000)
Amortization of net loss		117,000	171,000	149,000
Net periodic benefit cost		(94,000)	(48,000)	(49,000)
Total post retirement benefits expense		2,135,000	1,771,000	$ 1,350,000
Postretirement benefits
Postretirement benefits:
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		1,099,000	910,000
Pension, health and life insurance expense:
Interest cost		$ 285,000	$ 277,000

[1]	The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2018. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week at $1.55 per hour from August 10, 2019 through August 6, 2022.

Post Retirement Benefits (Detai

Post Retirement Benefits (Details) - USD ($)	12 Months Ended
Post Retirement Benefits (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2010
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year:
Interest cost		$ 285,000	$ 277,000	$ 298,000
Postretirement benefits
Postretirement benefits:
Decrease in post retirement obligations					$ 10,282,000
Amortization period					20 years
Change in net periodic benefit cost due to plan amendment		496,000	496,000	$ 496,000
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		1,099,000	910,000
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year:
Interest cost		$ 285,000	$ 277,000
Assumed health care cost trend rates:
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year		6.00%	6.20%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		5.00%	5.00%
Effect of changing the health care cost trend rate by one-percentage point for each future year:
Effect on total of service and interest cost components, 1 - percentage point increase		$ 39,000
Effect on total of service and interest cost components, 1 - percentage point decrease		(33,000)
Effect on post retirement benefit obligation, 1 - percentage point increase		1,169,000
Effect on post retirement benefit obligation, 1 - percentage point decrease		$ (997,000)
Scenario, Forecast [Member] \| Postretirement benefits
Postretirement benefits:
Change in net periodic benefit cost due to plan amendment	$ 496,000
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(78,000)
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year:
Amortization of prior service credit, net of tax	(496,000)
Amortization of loss, net of tax	(181,000)
Interest cost	$ 237,000

Post Retirement Benefits - Futu

Post Retirement Benefits - Future Benefit Payments (Details) - Postretirement benefits	Dec. 31, 2019USD ($)
Postretirement benefits:
2018	$ 1,233,000
2019	470,000
2020	497,000
2021	519,000
2022	496,000
2023 - 2027	$ 2,438,000

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details)	12 Months Ended
Fair Value of Financial Instruments (Details)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Fair value of financial instruments:
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$ 0	$ 0	$ 0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	1,499,000	(385,000)	517,000
Cost of Sales [Member]
Fair value of financial instruments:
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	272,000	68,000	445,000
Selling, General and Administrative Expenses [Member]
Fair value of financial instruments:
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 25,000	$ 0	67,000
Assets [Member]
Fair value of financial instruments:
Description of Location of Foreign Currency Derivatives on Balance Sheet	Prepaid expense other current assets	Prepaid expense other current assets
Foreign Currency Contract, Asset, Fair Value Disclosure	$ 452,000	$ 0
Derivative Asset, Notional Amount	$ 15,358,000	$ 0
Liability [Member]
Fair value of financial instruments:
Description of Location of Foreign Currency Derivatives on Balance Sheet	Accrued liabilities other	Accrued liabilities other
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ 0	$ 750,000
Derivative Liability, Notional Amount	0	27,588,000
Interest Rate Swap [Member]
Fair value of financial instruments:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(708,000)	(223,000)	0
Interest Rate Swap [Member] \| Interest Expense [Member]
Fair value of financial instruments:
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(67,000)	(159,000)	$ 0
Interest Rate Swap [Member] \| Assets [Member]
Fair value of financial instruments:
Derivative Asset, Notional Amount	$ 0	0
Description of Location of Interest Rate Derivatives on Balance Sheet	Other non-current assets
Interest Rate Derivatives, at Fair Value, Net	$ 0	0
Interest Rate Swap [Member] \| Liability [Member]
Fair value of financial instruments:
Derivative Liability, Notional Amount	$ 29,750,000	32,375,000
Description of Location of Interest Rate Derivatives on Balance Sheet	Other non-current liabilities
Interest Rate Derivatives, at Fair Value, Net	$ 706,000	$ 65,000
Interest Rate Swap [Member]
Fair value of financial instruments:
Debt Instrument, Face Amount	$ 35,000,000
Derivative, Fixed Interest Rate	2.49%
MEXICO \| Minimum [Member]
Fair value of financial instruments:
Derivative, Forward Exchange Rate	19.53	19.52
MEXICO \| Maximum [Member]
Fair value of financial instruments:
Derivative, Forward Exchange Rate	20.58	20.47
CANADA \| Minimum [Member]
Fair value of financial instruments:
Derivative, Forward Exchange Rate	1.32	1.28
CANADA \| Maximum [Member]
Fair value of financial instruments:
Derivative, Forward Exchange Rate	1.32	1.33

AOCI (Details)

AOCI (Details) - USD ($)	12 Months Ended
AOCI (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 2,117,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,370,000	$ 2,117,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(612,000)	(197,000)
Other comprehensive income before reclassifications	791,000	(608,000)
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	(230,000)	(91,000)
Other Comprehensive Income (Loss), Tax	(140,000)	102,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(191,000)	(612,000)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,729,000	2,267,000
Other comprehensive income before reclassifications	(1,102,000)	910,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(379,000)	(325,000)
Other Comprehensive Income (Loss), Tax	313,000	(123,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,561,000	2,729,000
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,117,000	2,070,000
Other comprehensive income before reclassifications	(311,000)	302,000
Amounts reclassified from accumulated other comprehensive income, before tax	(609,000)	(234,000)
Other Comprehensive Income (Loss), Tax	173,000	(21,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,370,000	$ 2,117,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 162,000

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly results of operations:
Total sales	$ 56,122,000	$ 74,655,000	$ 81,247,000	$ 72,266,000	$ 73,162,000	$ 64,676,000	$ 68,601,000	$ 63,046,000	$ 39,065,000	$ 38,494,000	$ 47,368,000	$ 36,746,000	$ 284,290,000	$ 269,485,000	$ 161,673,000
Gross margin	3,382,000	6,484,000	8,491,000	3,149,000	6,497,000	4,862,000	7,897,000	7,885,000	5,059,000	5,752,000	7,341,000	6,479,000	21,506,000	27,141,000	24,631,000
Operating Income (Loss)	(4,121,000)	(4,657,000)	1,267,000	(4,017,000)	(4,156,000)	(1,487,000)	1,418,000	1,125,000	820,000	1,394,000	3,173,000	2,554,000	(11,528,000)	(3,100,000)	7,941,000
Net income (loss)	$ (5,462,000)	$ (6,125,000)	$ 209,000	$ (3,845,000)	$ (3,942,000)	$ (1,803,000)	$ 445,000	$ 518,000	$ 754,000	$ 855,000	$ 2,162,000	$ 1,688,000	$ (15,223,000)	$ (4,782,000)	$ 5,459,000
Net income per common share:
Earnings Per Share, Basic	$ (0.69)	$ (0.78)	$ 0.03	$ (0.49)	$ (0.51)	$ (0.23)	$ 0.06	$ 0.07	$ 0.10	$ 0.11	$ 0.28	$ 0.22	$ (1.94)	$ (0.62)	$ 0.71
Earnings Per Share, Diluted	$ (0.69)	$ (0.78)	$ 0.03	$ (0.49)	$ (0.51)	$ (0.23)	$ 0.06	$ 0.07	$ 0.10	$ 0.11	$ 0.28	$ 0.22	$ (1.94)	$ (0.62)	$ 0.70
Product [Member]
Quarterly results of operations:
Total sales	$ 54,585,000	$ 67,511,000	$ 75,440,000	$ 71,451,000	$ 68,975,000	$ 62,305,000	$ 65,225,000	$ 59,712,000	$ 37,900,000	$ 37,593,000	$ 36,794,000	$ 36,336,000	$ 268,987,000	$ 256,217,000	$ 148,623,000
Service [Member]
Quarterly results of operations:
Total tooling sales	$ 1,537,000	$ 7,144,000	$ 5,807,000	$ 815,000	$ 4,187,000	$ 2,371,000	$ 3,376,000	$ 3,334,000	$ 1,165,000	$ 901,000	$ 10,574,000	$ 410,000	$ 15,303,000	$ 13,268,000	$ 13,050,000

Schedule II (Details)

Schedule II (Details) - USD ($)		12 Months Ended
Schedule II (Details) - USD ($)		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 25,000	$ 0	$ 0
(Recovered)/Charged to Costs and Expenses		4,000	25,000	0
Charged to Other Accounts		36,000	0	0
Deductions	[1]	15,000	0	0
Balance at End of Year		50,000	25,000	0
Allowance for Chargebacks [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		2,344,000	857,000	309,000
(Recovered)/Charged to Costs and Expenses		1,316,000	2,639,000	981,000
Charged to Other Accounts		0	0	0
Deductions	[1]	3,184,000	1,152,000	433,000
Balance at End of Year		$ 476,000	$ 2,344,000	$ 857,000

[1]	(A) Amount represents uncollectible accounts written off.