Core Molding (CMT) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2021	May 06, 2021
Entity Listings [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-12505
Entity Registrant Name	CORE MOLDING TECHNOLOGIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	31-1481870
Entity Address, Address Line One	800 Manor Park Drive
Entity Address, City or Town	Columbus
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43228-0183
City Area Code	614
Local Phone Number	870-5000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.01
Security Exchange Name	NYSEAMER
Trading Symbol	CMT
Entity Common Stock, Shares Outstanding (in shares)		8,484,477
Entity Central Index Key	0001026655
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 72,829	$ 64,023
Cost of sales	60,111	53,257
Gross margin	12,718	10,766
Selling, general and administrative expense	7,372	6,505
Operating income	5,346	4,261
Other income and expense
Interest expense	579	1,174
Net periodic post-retirement benefit	(40)	(20)
Total other expense	539	1,154
Income before taxes	4,807	3,107
Income tax expense (benefit)	1,351	(4,854)
Net income	$ 3,456	$ 7,961
Net income per common share:
Basic (in USD per share)	$ 0.41	$ 0.97
Diluted (in USD per share)	$ 0.41	$ 0.97

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income	$ 3,456	$ 7,961
Post retirement benefit plan adjustments:
Net actuarial gain	43	45
Prior service costs	(124)	(124)
Income tax benefit	17	17
Comprehensive income	3,392	5,980
Foreign currency hedging derivatives:
Foreign currency hedging derivatives:
Unrealized hedge loss	0	(1,674)
Income tax benefit	0	(360)
Interest rate swaps:
Foreign currency hedging derivatives:
Unrealized hedge loss	0	(783)
Income tax benefit	$ 0	$ (178)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 3,027	$ 4,131
Accounts receivable, net	40,202	27,584
Inventories, net	20,373	18,360
Income tax receivable	2,255	2,026
Prepaid expenses and other current assets	3,966	4,377
Total current assets	69,823	56,478
Right of use asset	4,346	2,754
Property, plant and equipment, net	74,000	74,052
Goodwill	17,376	17,376
Intangibles, net	11,029	11,516
Other non-current assets	3,211	3,332
Total Assets	179,785	165,508
Current liabilities:
Current portion of long-term debt	2,938	2,535
Revolving debt	3,001	420
Accounts payable	25,465	16,994
Taxes payable	1,041	2,613
Contract liability	2,153	1,319
Compensation and related benefits	7,300	8,305
Accrued other liabilities	4,411	3,809
Total current liabilities	46,309	35,995
Other non-current liabilities	3,893	2,560
Long-term debt	24,226	25,198
Post retirement benefits liability	7,762	7,823
Total Liabilities	82,190	71,576
Commitments and Contingencies	0	0
Stockholders’ Equity:
Preferred stock — $0.01 par value, authorized shares — 10,000,000; no shares outstanding at March 31, 2021 and December 31, 2020	0	0
Common stock — $0.01 par value, authorized shares – 20,000,000; outstanding shares 7,987,800 at March 31, 2021 and 7,980,516 at December 31, 2020	80	80
Paid-in capital	36,445	36,127
Accumulated other comprehensive income, net of income taxes	1,311	1,375
Treasury stock - at cost, 3,810,929 at March 31, 2021 and December 31, 2020	(28,568)	(28,521)
Retained earnings	88,327	84,871
Total Stockholders’ Equity	97,595	93,932
Total Liabilities and Stockholders’ Equity	$ 179,785	$ 165,508

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares outstanding (in shares)	7,987,800	7,980,516
Treasury stock (in shares)	3,810,929	3,810,929

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Foreign currency hedging derivatives:	Interest rate swaps:	Common Stock Outstanding	Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Other Comprehensive IncomeForeign currency hedging derivatives:	Accumulated Other Comprehensive IncomeInterest rate swaps:	Treasury Stock	Retained Earnings
Beginning Balance (in shares) at Dec. 31, 2019				7,877,945
Beginning Balance at Dec. 31, 2019	$ 84,426			$ 79	$ 34,772	$ 1,370			$ (28,501)	$ 76,706
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,961									7,961
Change in post retirement benefits, net of tax benefit of $17	(62)					(62)
Gain (loss) on derivatives		$ (1,314)	$ (605)				$ (1,314)	$ (605)
Restricted stock vested (in shares)				4,771
Share-based compensation	$ 316				316
Ending Balance (in shares) at Mar. 31, 2020	7,882,716
Ending Balance at Mar. 31, 2020	$ 90,722			$ 79	35,088	(611)			(28,501)	84,667
Beginning Balance (in shares) at Dec. 31, 2020	7,980,516			7,980,516
Beginning Balance at Dec. 31, 2020	$ 93,932			$ 80	36,127	1,375			(28,521)	84,871
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,456									3,456
Change in post retirement benefits, net of tax benefit of $17	(64)					(64)
Purchase of treasury stock	(47)								(47)
Restricted stock vested (in shares)				7,284
Share-based compensation	$ 318				318
Ending Balance (in shares) at Mar. 31, 2021	7,987,800			7,987,800
Ending Balance at Mar. 31, 2021	$ 97,595			$ 80	$ 36,445	$ 1,311			$ (28,568)	$ 88,327

Consolidated Statement of Sto_2

Consolidated Statement of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Tax benefit, benefit plan	$ 17	$ 17
Foreign currency hedging derivatives:
Tax benefit, hedge	0	360
Interest rate swaps:
Tax benefit, hedge	$ 0	$ 178

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 3,456	$ 7,961
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	3,049	2,823
Deferred income tax	0	517
Share-based compensation	318	316
Losses (gains) on foreign currency translation	235	(74)
Change in operating assets and liabilities:
Accounts receivable	(12,618)	4,389
Inventories	(2,013)	2,050
Prepaid and other assets	303	(4,882)
Accounts payable	8,283	(7,444)
Accrued and other liabilities	(1,385)	(184)
Post retirement benefits liability	(140)	(93)
Net cash provided (used in) by operating activities	(512)	5,379
Cash flows from investing activities:
Purchase of property, plant and equipment	(2,436)	(456)
Net cash used in investing activities	(2,436)	(456)
Cash flows from financing activities:
Gross repayments on revolving line of credit	(5,915)	(38,814)
Gross borrowings on revolving line of credit	8,496	34,582
Payments related to the purchase of treasury stock	(47)	0
Payment of deferred loan costs	(2)	0
Payment of principal on term loans	(688)	(1,125)
Net cash provided by (used in) financing activities	1,844	(5,357)
Net change in cash and cash equivalents	(1,104)	(434)
Cash and cash equivalents at beginning of period	4,131	1,856
Cash and cash equivalents at end of period	3,027	1,422
Cash paid for:
Interest	467	1,088
Income taxes	2,560	185
Non-cash investing activities:
Fixed asset purchases in accounts payable	$ 99	$ 184

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and include all of the information and disclosures required by accounting principles generally accepted in the United States of America for interim reporting, which are less than those required for annual reporting. In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (all of which are normal and recurring in nature) necessary to present fairly the financial position of Core Molding Technologies, Inc. and its subsidiaries (“Core Molding Technologies” or the “Company”) at March 31, 2021, and the results of operations and cash flows for the three months ended March 31, 2021. The “Notes to Consolidated Financial Statements” contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2020, should be read in conjunction with these consolidated financial statements. 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 one reporting unit, Core Technologies. 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"), resin transfer molding ("RTM"), liquid molding of dicyclopentadiene ("DCPD"), spray-up and hand-lay-up, direct long-fiber thermoplastics ("D-LFT") and structural foam and structural web injection molding ("SIM"). 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 production facilities produce structural composite products.

Critical Accounting Policies an

Critical Accounting Policies and Estimates	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Critical Accounting Policies and Estimates	CRITICAL ACCOUNTING POLICIES AND ESTIMATES Principles of Consolidation: Management believes the following critical accounting policies, among others, affect its more significant judgments and estimates used in the preparation of its consolidated financial statements. 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. On an on-going basis, management evaluates its estimates and judgments. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates, due to the uncertainty around the magnitude and duration of the COVID-19 pandemic, as well as other factors. Revenue Recognition: The Company recognizes revenue from two streams, product revenue and tooling revenue. Product revenue is earned from the manufacture and sale of thermoplastic and thermoset structural products. Revenue from product sales is generally recognized as products are shipped, as the Company transfers title and risk of ownership to the customer and is entitled to payment. In limited circumstances, the Company recognizes revenue from product sales when products are produced and the customer takes title and risk of ownership at the Company's production facility. Tooling revenue is earned from manufacturing tools, molds and assembly equipment as part of 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. 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. 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 recorded an allowance for doubtful accounts of $51,000 and $41,000 at March 31, 2021 and December 31, 2020, respectively. Management also records an allowance for estimated customer chargebacks for returns, price discounts and adjustments, premium freight and expediting costs and customer production line disruption costs resulting from late deliveries. At times, customers have asserted a right to significant production line disruption charges to recover damages as a result of late delivery. The Company typically works with its customers to minimize disruption charges, validate damages and negotiate resolution. The Company records accruals for customer chargebacks when a valid charge is probable and the amount of the charge can be reasonably estimated. Should customer chargebacks fluctuate from the estimated amounts, additional allowances may be necessary. The Company reduced accounts receivable for chargebacks by $402,000 at March 31, 2021 and $179,000 at December 31, 2020. 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 $451,000 at March 31, 2021 and $546,000 at December 31, 2020. 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. The Company has recorded contract assets of $549,000 at March 31, 2021, and $554,000 at December 31, 2020. Contract assets are generally classified as current within prepaid expenses and other current assets on the Consolidated Balance Sheets. For the three months ended March 31, 2021, the Company recognized no impairments on contract assets. For the three months ended March 31, 2021, the Company recognized $2,710,000 amount of revenue from contract liabilities related to open jobs outstanding as of December 31, 2020. Income Taxes: 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. For more information, refer to Note 11, "Income Taxes", of the Notes to Consolidated Financial Statements contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2020. Long-Lived Assets: Long-lived assets consist primarily of property, plant and equipment and definite-lived intangibles. 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 property, plant and equipment 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 three months ended March 31, 2021 or March 31, 2020. 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. 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 period. The Company may resume the qualitative assessment 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 the 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, 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, or if a qualitative assessment indicates it is more-likely-than-not that the estimated carrying value exceeds its fair value, the Company proceeds to a quantitative approach. There were no indicators of impairment for the three months ended March 31, 2021. The company also performed a qualitative analysis for the year end December 31, 2020 and determined that no impairment is needed for the year 2020. 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 March 31, 2021 and December 31, 2020 of $763,000 and $933,000, respectively. Derivative Instruments: Derivative instruments are utilized to manage exposure to fluctuations in foreign currency exchange rates and interest rates on long term debt obligations. All derivative instruments are formally documented as cash flow hedges and are recorded at fair value at each reporting period. Gains and losses related to currency forward contracts and interest rate swaps are deferred and recorded as a component of Accumulated Other Comprehensive Income in the Consolidated Statement of Stockholders' Equity and then subsequently recognized in the Consolidated Statement of Operations when the hedged item affects net income. The ineffective portion of the change in fair value of a hedge, if any, is recognized in income. For additional information on derivative instruments, see Note 14, "Fair Value of Financial Instruments". Post-retirement Benefits: Management records an accrual for post-retirement costs associated with the health care plan sponsored by Core Molding Technologies. 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 Core Molding Technologies’ operations. The effect of a change in healthcare costs is described in Note 12, "Post Retirement Benefits", of the Notes to Consolidated Financial Statements contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2020. Core Molding Technologies had a liability for post retirement healthcare benefits based on actuarial computed estimates of $9,048,000 at March 31, 2021 and $9,109,000 at December 31, 2020.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS 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 November 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 fiscal years beginning after December 15, 2022. 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. Facilitation of the Effects of Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848). The ASU provides optional expedients and exceptions for applying GAAP to transactions affected by reference rate (e.g., LIBOR) reform if certain criteria are met, for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The ASU is effective as of March 12, 2020 through December 31, 2022. We will evaluate transactions or contract modifications occurring as a result of reference rate reform and determine whether to apply the optional guidance on an ongoing basis.

Net Income Per Common Share

Net Income Per Common Share	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Net Income Per Common Share	NET INCOME PER COMMON SHARE Net income per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted net income 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 computation of basic and diluted net income per common share (in thousands, except for per share data) is as follows: Three months ended 2021 2020 Net income $ 3,456 $ 7,961 Less: net income allocated to participating securities 204 321 Net income available to common shareholders $ 3,252 $ 7,640 Weighted average common shares outstanding — basic 7,985,000 7,882,000 Effect of dilutive securities 7,000 — Weighted average common and potentially issuable common shares outstanding — diluted 7,992,000 7,882,000 Basic net income per common share $ 0.41 $ 0.97 Diluted net income per common share $ 0.41 $ 0.97 The computation of basic and diluted net income per participating shares is as follows (in thousands, except for per share data): Three months ended 2021 2020 Net income allocated to participating securities $ 204 $ 321 Weighted average participating shares outstanding — basic 500,000 338,000 Effect of dilutive securities — — Weighted average common and potentially issuable common shares outstanding — diluted 500,000 338,000 Basic net income per participating share $ 0.41 $ 0.97 Diluted net income per participating share $ 0.41 $ 0.97

Major Customers

Major Customers	3 Months Ended
	Mar. 31, 2021
Concentration Risks, Types, No Concentration Percentage [Abstract]
Major Customers	MAJOR CUSTOMERS The Company had five major customers during the three months ended March 31, 2021, Universal Forest Products, Inc. (“UFP”), Navistar, Inc. (“Navistar”), Volvo Group North America, LLC (“Volvo”), PACCAR, Inc. (“PACCAR”), and BRP, Inc. (“BRP”). Major customers are defined as customers whose 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 these customers could have a material adverse effect on the business of the Company. The following table presents sales revenue for the above-mentioned customers for the three months ended March 31, 2021 and 2020 (in thousands): Three months ended 2021 2020 UFP product sales $ 10,657 $ 8,987 UFP tooling sales — — Total UFP sales 10,657 8,987 Navistar product sales 9,937 10,667 Navistar tooling sales 306 98 Total Navistar sales 10,243 10,765 Volvo product sales 10,125 7,573 Volvo tooling sales 20 1,525 Total Volvo sales 10,145 9,098 PACCAR product sales 9,354 7,949 PACCAR tooling sales 329 207 Total PACCAR sales 9,683 8,156 BRP product sales 8,568 7,247 BRP tooling sales 115 220 Total BRP sales 8,683 7,467 Other product sales 20,492 19,507 Other tooling sales 2,926 43 Total other sales 23,418 19,550 Total product sales 69,133 61,930 Total tooling sales 3,696 2,093 Total sales $ 72,829 $ 64,023

Inventory

Inventory	3 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Inventory	INVENTORY Inventories, net consisted of the following (in thousands): March 31, 2021 December 31, 2020 Raw materials $ 13,576 $ 11,640 Work in process 1,808 1,679 Finished goods 4,989 5,041 Total $ 20,373 $ 18,360 Inventory quantities on-hand are regularly reviewed, and where necessary, provisions for excess and obsolete inventory are recorded based on historical and anticipated usage.

Leases

Leases	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	LEASES The Company has operating leases with fixed payment terms for certain buildings and warehouses. The Company's leases have remaining lease terms of less than one year to four years, some of which include options to extend the lease for five years. Operating leases are included in operating lease right-of-use ("ROU") assets, accrued other liabilities and other non-current liabilities in the Consolidated Balance Sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our 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 (in thousands): Three Months Ended 2021 2020 Operating lease cost $ 368 $ 357 Total net lease cost $ 368 $ 357 Other supplemental balance sheet information related to leases was as follows (in thousands): March 31, 2021 December 31, 2020 Operating leases: Operating lease right of use assets $ 4,346 $ 2,754 Total operating lease right of use assets $ 4,346 $ 2,754 Current operating lease liabilities (A) $ 1,289 $ 1,023 Noncurrent operating lease liabilities (B) 3,017 1,670 Total operating lease liabilities $ 4,306 $ 2,693 (A) Current operating lease liabilities are included in accrued other liabilities (B) Noncurrent operating lease liabilities are included in other non-current liabilities The following table presents certain information related to lease terms and discount rates for leases as of March 31, 2021 and December 31, 2020: March 31, 2021 December 31, 2020 Weighted average remaining lease term (in years): Operating leases 4.2 3.5 Weighted average discount rate: Operating leases 5.5 % 5.9 % Other information related to leases were as follows (in thousands) : Three Months Ended 2021 2020 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases (C) $ 368 $ 357 (C) Cash flow from operating lease included in prepaid and other assets on the Consolidated Statements of Cash Flows. As of March 31, 2021, maturities of lease liabilities were as follows (in thousands): Operating Leases 2021 (remainder of year) $ 1,130 2022 1,157 2023 1,058 2024 1,063 2025 628 Total lease payments 5,036 Less: imputed interest (730) Total lease obligations 4,306 Less: current obligations 1,289 Long-term lease obligations $ 3,017 As of December 31, 2020, maturities of lease liabilities were as follows (in thousands): Operating Leases 2021 $ 1,215 2022 811 2023 706 2024 705 2025 — Total lease payments 3,437 Less: imputed interest (744) Total lease obligations 2,693 Less: current obligations (1,023) Long-term lease obligations $ 1,670

Property, Plant & Equipment

Property, Plant & Equipment	3 Months Ended
	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant & Equipment	PROPERTY, PLANT & EQUIPMENT Property, plant and equipment, net consisted of the following for the periods specified (in thousands): March 31, 2021 December 31, 2020 Property, plant and equipment $ 176,942 $ 174,553 Accumulated depreciation (102,942) (100,501) Property, plant and equipment — net $ 74,000 $ 74,052 Property, plant, and equipment are recorded at cost, unless obtained through acquisition, then assets are recorded at estimated fair value at the date of acquisition. 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 an adjustment to the depreciation period or to the unamortized balance is warranted. Depreciation expense for the three months ended March 31, 2021 and 2020 was $2,482,000 and $2,269,000, respectively. Amounts invested in capital additions in progress were $2,543,000 and $1,422,000 at March 31, 2021 and December 31, 2020, respectively. At March 31, 2021 and December 31, 2020, purchase commitments for capital expenditures in progress were $5,041,000 and $677,000, respectively.

Goodwill and Intangibles

Goodwill and Intangibles	3 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	GOODWILL AND INTANGIBLES Goodwill activity for the three months ended March 31, 2021 consisted of the following (in thousands): Balance at December 31, 2020 $ 17,376 Additions — Impairment — Balance at March 31, 2021 $ 17,376 Intangibles, net at March 31, 2021 were comprised of the following (in thousands): Definite-lived Intangible Assets Amortization Period Gross Carrying Accumulated Net Carrying Trade name 25 Years $ 250 $ (60) $ 190 Trademarks 10 Years 1,610 (516) 1,094 Non-competition agreement 5 Years 1,810 (1,161) 649 Developed technology 7 Years 4,420 (2,025) 2,395 Customer relationships 10-12 Years 9,330 (2,629) 6,701 Total $ 17,420 $ (6,391) $ 11,029 Intangibles, net at December 31, 2020 were comprised of the following (in thousands): Definite-lived Intangible Assets Amortization Period Gross Carrying Accumulated Net Carrying Trade name 25 Years $ 250 $ (58) $ 192 Trademarks 10 Years 1,610 (476) 1,134 Non-competition agreement 5 Years 1,810 (1,071) 739 Developed technology 7 Years 4,420 (1,869) 2,551 Customer relationships 10-12 Years 9,330 (2,430) 6,900 Total $ 17,420 $ (5,904) $ 11,516

Post Retirement Benefits

Post Retirement Benefits	3 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
Post Retirement Benefits	POST RETIREMENT BENEFITS The components of expense for the Company’s post-retirement benefit plans are as follows (in thousands): Three months ended 2021 2020 Pension expense: Multi-employer plan $ 189 $ 246 Defined contribution plan 302 293 Total pension expense 491 539 Health and life insurance: Interest cost 41 59 Amortization of prior service costs (124) (124) Amortization of net loss 43 45 Net periodic benefit cost (40) (20) Total post retirement benefits expense $ 451 $ 519 The Company made payments of $201,000 to pension plans and $101,000 for post-retirement healthcare and life insurance during the three months ended March 31, 2021. For the remainder of 2021, the Company expects to make approximately $1,599,000 of pension plan payments, of which $774,000 was accrued at March 31, 2021. The Company also expects to make approximately $1,185,000 of post-retirement healthcare and life insurance payments for the remainder of 2021, all of which were accrued at March 31, 2021.

Debt

Debt	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Debt	11. DEBT Debt consists of the following (in thousands): March 31, December 31, Wells Fargo term loans payable $ 15,791 $ 16,390 FGI term loans payable 13,069 13,148 Leaf Capital term loan payable 144 152 Total 29,004 29,690 Less deferred loan costs (1,840) (1,957) Less current portion (2,938) (2,535) Long-term debt $ 24,226 $ 25,198 Term Loans Wells Fargo Term Loans On October 27, 2020, the Company entered into a credit agreement (the “Credit Agreement”) with Wells Fargo Bank, National Association, as administrative agent, lead arranger and book runner, and the lenders party thereto (the “Lenders”). Pursuant to the terms of the Credit Agreement, the Lenders made available to the Company secured term loans (the “WF Term Loans”) in the maximum aggregate principal amount of $18,500,000 ($16,790,000 of which was advanced to the Company on October 28, 2020). The proceeds from the WF Term Loans were used to pay off the Company’s existing outstanding indebtedness with KeyBank National Association, and to pay certain fees and expenses associated with the financing. At the option of the Company, the WF Term Loans bears interest at a per annum rate equal to LIBOR plus a margin of 300 basis points or base rate plus a margin of 200 basis points. LIBOR rate means the greater of (a) 0.75% per annum and (b) the per annum published LIBOR rate for interest periods of one, three or six months as chosen by the Company. Base rate is the greater of (a) 1.0% per annum, (b) the Federal Funds Rate plus 0.5%, (c) LIBOR Rate plus 100 basis or (d) prime rate. The weighted average interest rate was 3.77% as of March 31, 2021. The WF Term Loans are to be repaid in monthly installments of $200,000 plus interest, with the remaining outstanding balance due on November 30, 2024, subject to certain optional and mandatory repayment terms. The Company’s obligations under the WF Term Loans are unconditionally guaranteed by each of the Company’s U.S. and Canadian subsidiaries, with such obligations of the Company and such subsidiaries being secured by a lien on substantially all of their U.S. and Canadian assets. The WF Term Loans contains reporting, indebtedness, and financial covenants. The Company is in compliance with its covenants as of March 31, 2021. Voluntary prepayments of amounts outstanding under the WF Term Loans are permitted at any time without premium or penalty. To the extent applicable, LIBOR breakage fees may be charged in connection with any prepayment. FGI Equipment Finance LLC Term Loan On October 20, 2020, the Company entered into a Master Security Agreement and a Promissory Note, among FGI Equipment Finance LLC, (“FGI”) the Company as debtor, and each of Core Composites Corporation, a subsidiary of the Company organized in Delaware, and CC HPM, S. de R.L. de C.V., a subsidiary of the Company organized in Mexico, as guarantors, the principal amount of $13,200,000 (the “FGI Term Loan”). On October 27, 2020, FGI advanced to the Company $12,000,000 which proceeds were used to pay off the Company’s existing outstanding indebtedness with KeyBank National Association, and to pay certain fees and expenses associated with the transactions, and $1,200,000 which proceeds were used to fund a security deposit to be held by FGI. Interest on the FGI Term Loan is a fixed rate of 8.25% and is payable monthly. The security deposit of $1,200,000 is located in prepaid expenses and other current assets on the Consolidated Balance Sheets. Following the advance of funds by FGI, the FGI Term Loan is to be repaid in monthly principal and interest installments of $117,000 for the first 12 months, $246,000 for the subsequent 59 months and $1,446,000 due on October 31, 2026, subject to certain optional and mandatory repayment terms. The Company’s obligations under the Master Security Agreement are secured by certain machinery and equipment of the guarantors located in Mexico, and real property of Core Composites de Mexico, S. de R.L. de C.V.,a subsidiary of the Company organized in Mexico, located in Matamoros, Mexico. The Company may prepay in full or in part (but not less than the amount equal to 20% of the original principal amount of the loan) outstanding amounts before they are due on any scheduled Payment Date upon at least thirty (30) days’ prior written notice. The Company will pay a “Prepayment Fee” in an amount equal to an additional sum equal to the following percentage of the principal amount to be prepaid for prepayments occurring in the indicated period: four percent (4.0%) (for prepayments occurring prior to the first anniversary of the FGI Term Loan); three percent (3.0%) (for prepayments occurring on the first anniversary of the FGI Term Loan until the second anniversary of the FGI Term Loan); two percent (2.0%) (for prepayments occurring on and after the second anniversary of the FGI Term Loan and prior to the third anniversary of the Loan ); and one percent (1.0%) (for prepayments occurring any time thereafter). Leaf Capital Funding On April 24, 2020 the Company entered into a finance agreement with Leaf Capital Funding of $175,000 for equipment. The parties agreed to a fixed interest rate of 5.5% and a term of 60 months. Revolving Loans Wells Fargo Revolving Loan On October 27, 2020, the Company entered into a credit agreement (the “Credit Agreement”) with Wells Fargo Bank, National Association, as administrative agent, lead arranger and book runner, and the lenders party thereto (the “Lenders”). Pursuant to the terms of the Credit Agreement, the Lenders made available to the Company a revolving loan commitment (the “WF Revolving Loan”) of $25,000,000 ($8,745,000 of which was advanced to the Company on October 28, 2020). The proceeds from the WF Revolving Loan were used to pay off the Company’s existing outstanding indebtedness with KeyBank National Association, and to pay certain fees and expenses associated with the financing. The Credit Agreement also makes available to the Company an incremental revolving commitment in the maximum amount of $10,000,000 at the Company’s option at any time during the three-year period following the closing. The borrowing availability under the WF Revolving Loan is the lesser of (a) the loan commitment of $25,000,000 or (b) the sum of 90% of eligible investment grade accounts receivable, 85% of non-investment grade eligible accounts receivable and 65% of eligible inventory. At the option of the Company, the WF Revolving Loan bears interest at a per annum rate equal to LIBOR plus a margin of 200 to 250 basis points or base rate plus a margin of 100 to 150 basis points, with the margin rate being based on the excess availability amount under the line of credit. LIBOR rate means the greater of (a) 0.75% per annum and (b) the per annum published LIBOR rate for interest periods of one, three or six months as chosen by the Company. Base rate is the greater of (a) 1.0% per annum, (b) the Federal Funds Rate plus 0.5%, (c) LIBOR Rate plus 100 basis and (d) prime rate. The weighted average interest rate was 3.25% as of December 31, 2020. The WF Revolving Loan commitment terminates, and all outstanding borrowings thereunder must be repaid, by November 30, 2024. The Company has $24,278,000 of available rate revolving loans of which $3,001,000 is outstanding as of March 31, 2021. The WF Revolving Loan contains the same covenants as the WF Term Loans. Wells Fargo Bank will issue up to $2,000,000 of Letters of Credit in accordance with the terms of the Credit Agreement upon the Company’s request. As of March 31, 2021, the Company had one Letter of Credit outstanding for $160,000. KeyBank Loan On March 31, 2020, the Company had a term loan and revolving loan balance of $37,125,000 and $7,776,000 with KeyBank National Association, respectively. The Company’s term loan and revolving loan had variable interest rates of 7.50% and 6.62%, respectively at March 31, 2020. Bank Covenants

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Company’s Consolidated Balance Sheets include a net non-current deferred tax asset of $663,000 for the Canadian and Mexican tax jurisdictions and a net non-current deferred tax liability of $883,000 for the U.S. tax jurisdiction at March 31, 2021. The non-current deferred tax asset is classified in other non-current assets and non-current deferred tax liabilities are in other non-current liabilities. 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. As of March 31, 2021 and December 31, 2020, the Company had no liability for unrecognized tax benefits. The Company does not anticipate that unrecognized tax benefits will significantly change within the next twelve months. Income tax expense for the three months ended March 31, 2021 is estimated to be $1,351,000, approximately 28.1% of income before income taxes. Income tax benefit for the three months ended March 31, 2020 was estimated to be $4,854,000, approximately 156% of income before income taxes. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the "CARES Act") was enacted in response to the COVID-19 pandemic, and among other things, provides tax relief to businesses. Tax provisions of the CARES Act include the deferral of certain payroll taxes, relief for retaining employees, and other provisions, including allowing net operating losses to be carried back five years versus an indefinite carryforward. An income tax benefit of $5,638,000 was realized in the first quarter of 2020. The income tax benefit consists of the reversal of the full valuation allowance against net deferred tax assets in the United States for approximately $3,267,000. The income tax benefit also consists of a rate benefit of $2,371,000 based on the losses being carried back to years where the Company paid tax at 34% compared to the valuation of the losses being recorded at the 21% current U.S. statutory tax rate. The Company files income tax returns in the U.S., Mexico, Canada and various state jurisdictions. The Company is not subject to U.S. federal and state income tax examinations by tax authorities for years prior to 2017, not subject to Mexican income tax examinations by Mexican authorities for years prior to 2015 and not subject to Canadian tax examinations by Canadian authorities for years prior to 2018.

Stock Based Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [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 and as amended in May 2015. 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. Restricted Stock The Company grants shares of its common stock to certain directors, officers, key managers and employees in the form of unvested stock and units (“Restricted Stock”). These awards are recorded at the market value of the Company's common stock on the date of issuance and amortized ratably as compensation expense over the applicable vesting period, which is typically three years. The Company adjusts compensation expense for actual forfeitures, as they occur. The following summarizes the status of Restricted Stock and changes during the three months ended March 31, 2021: Number of Weighted Average Grant Date Fair Value Unvested balance at December 31, 2020 507,835 $ 6.25 Granted — — Vested (11,158) 3.38 Forfeited — — Unvested balance at March 31, 2021 496,677 $ 6.00 At March 31, 2021 and 2020, there was $1,325,000 and $1,292,000, 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 1.9 years. Total compensation cost related to restricted stock grants for the three months ended March 31, 2021 and 2020 was $289,000 and $292,000, respectively, all of which was recorded to selling, general and administrative expense. During the three months ended March 31, 2021, employees surrendered 3,874 shares of the Company's common stock to satisfy income tax withholding obligations in connection with the vesting of restricted awards. No shares were surrendered for the three months ended March 31, 2020. Stock Appreciation Rights As part of the Company's 2020 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 three months ended March 31, 2021 is as follows: Number of Weighted Average Grant Date Fair Value Outstanding as of December 31, 2020 180,925 $ 2.57 Granted — — Exercised — — Forfeited — — Outstanding at end of the period ended March 31, 2021 180,925 $ 2.57 Exercisable at end of the period ended March 31, 2021 73,888 $ 2.57

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2021
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 March 31, 2021 and December 31, 2020 approximate fair value due to the short-term maturities of these financial instruments. The carrying amounts of WF Term Loan and WF Revolving Loan approximate fair value as of March 31, 2021 and December 31, 2020 due to the short term nature of the underlying variable rate LIBOR agreements. The FGI Term Loan approximate fair value as of March 31, 2021 and December 31, 2020 due to immaterial movement in interest rates since the Company entered into the Promissory Note on October 20, 2020. The following tables summarize the amount of unrealized and realized gain (loss) recognized in Accumulated Other Comprehensive Income (Loss) ("AOCI") for the three months ended March 31, 2021 and 2020 (in thousands): Derivatives in Amount of Unrealized Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) (A) Amount of Realized Gain 2021 2020 2021 2020 Foreign exchange $ — $ (1,745) Cost of goods sold $ — $ (58) Selling, general and administrative expense $ — $ (13) Interest rate swaps $ — $ (833) Interest expense $ — $ (50) (A) The foreign currency derivative activity reclassified from Accumulated Other Comprehensive Income (Loss) is allocated to cost of goods sold and selling, general and administrative expense based on the percentage of foreign currency spend.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table presents changes in Accumulated Other Comprehensive Income (Loss), net of tax, for the three months ended March 31, 2021 and 2020 (in thousands): 2020: Derivative Post Retirement Benefit Plan Items (A) Accumulated Balance at December 31, 2019 $ (191) $ 1,561 $ 1,370 Other comprehensive loss before reclassifications (2,578) — (2,578) Amounts reclassified from accumulated other comprehensive income (loss) 121 (79) 42 Income tax benefit 538 17 555 Balance at March 31, 2020 $ (2,110) $ 1,499 $ (611) 2021: Balance at December 31, 2020 $ — $ 1,375 $ 1,375 Other comprehensive loss before reclassifications — — — Amounts reclassified from accumulated other comprehensive income (loss) — (81) (81) Income tax benefit — 17 17 Balance at March 31, 2021 $ — $ 1,311 $ 1,311

Critical Accounting Policies _2

Critical Accounting Policies and Estimates (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation: Management believes the following critical accounting policies, among others, affect its more significant judgments and estimates used in the preparation of its consolidated financial statements.
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. On an on-going basis, management evaluates its estimates and judgments. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates, due to the uncertainty around the magnitude and duration of the COVID-19 pandemic, as well as other factors.
Revenue Recognition	Revenue Recognition: The Company recognizes revenue from two streams, product revenue and tooling revenue. Product revenue is earned from the manufacture and sale of thermoplastic and thermoset structural products. Revenue from product sales is generally recognized as products are shipped, as the Company transfers title and risk of ownership to the customer and is entitled to payment. In limited circumstances, the Company recognizes revenue from product sales when products are produced and the customer takes title and risk of ownership at the Company's production facility. Tooling revenue is earned from manufacturing tools, molds and assembly equipment as part of 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. 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
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 recorded an allowance for doubtful accounts of $51,000 and $41,000 at March 31, 2021 and December 31, 2020, respectively. Management also records an allowance for estimated customer chargebacks for returns, price discounts and adjustments, premium freight and expediting costs and customer production line disruption costs resulting from late deliveries. At times, customers have asserted a right to significant production line disruption charges to recover damages as a result of late delivery. The Company typically works with its customers to minimize disruption charges, validate damages and negotiate resolution. The Company records accruals for customer chargebacks when a valid charge is probable and the amount of the charge can be reasonably estimated. Should customer chargebacks fluctuate from the estimated amounts, additional allowances may be necessary. The Company reduced accounts receivable for chargebacks by $402,000 at March 31, 2021 and $179,000 at December 31, 2020.
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 $451,000 at March 31, 2021 and $546,000 at December 31, 2020.
Contract Assets/Liabilities	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. The Company has recorded contract assets of $549,000 at March 31, 2021, and $554,000 at December 31, 2020. Contract assets are generally classified as current within prepaid expenses and other current assets on the Consolidated Balance Sheets. For the three months ended March 31, 2021, the Company recognized no impairments on contract assets. For the three months ended March 31, 2021, the Company recognized $2,710,000 amount of revenue from contract liabilities related to open jobs outstanding as of December 31, 2020.
Income Taxes	Income Taxes: 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. For more information, refer to Note 11, "Income Taxes", of the Notes to Consolidated Financial Statements contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2020.
Long-Lived Assets	Long-Lived Assets: Long-lived assets consist primarily of property, plant and equipment and definite-lived intangibles. 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 property, plant and equipment 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 three months ended March 31, 2021 or March 31, 2020.
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. 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 period. The Company may resume the qualitative assessment 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 the 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, 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, or if a qualitative assessment indicates it is more-likely-than-not that the estimated carrying value exceeds its fair value, the Company proceeds to a quantitative approach. There were no indicators of impairment for the three months ended March 31, 2021. The company also performed a qualitative analysis for the year end December 31, 2020 and determined that no impairment is needed for the year 2020.
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 March 31, 2021 and December 31, 2020 of $763,000 and $933,000, respectively.
Derivative Instruments	Derivative Instruments: Derivative instruments are utilized to manage exposure to fluctuations in foreign currency exchange rates and interest rates on long term debt obligations. All derivative instruments are formally documented as cash flow hedges and are recorded at fair value at each reporting period. Gains and losses related to currency forward contracts and interest rate swaps are deferred and recorded as a component of Accumulated Other Comprehensive Income in the Consolidated Statement of Stockholders' Equity and then subsequently recognized in the Consolidated Statement of Operations when the hedged item affects net income. The ineffective portion of the change in fair value of a hedge, if any, is recognized in income. For additional information on derivative instruments, see Note 14, "Fair Value of Financial Instruments".
Post-retirement Benefits	Post-retirement Benefits: Management records an accrual for post-retirement costs associated with the health care plan sponsored by Core Molding Technologies. 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 Core Molding Technologies’ operations. The effect of a change in healthcare costs is described in Note 12, "Post Retirement Benefits", of the Notes to Consolidated Financial Statements contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2020. Core Molding Technologies had a liability for post retirement healthcare benefits based on actuarial computed estimates of $9,048,000 at March 31, 2021 and $9,109,000 at December 31, 2020.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements, Policy	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 November 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 fiscal years beginning after December 15, 2022. 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. Facilitation of the Effects of Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848). The ASU provides optional expedients and exceptions for applying GAAP to transactions affected by reference rate (e.g., LIBOR) reform if certain criteria are met, for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The ASU is effective as of March 12, 2020 through December 31, 2022. We will evaluate transactions or contract modifications occurring as a result of reference rate reform and determine whether to apply the optional guidance on an ongoing basis.

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Computation of basic and diluted net income per common share:	The computation of basic and diluted net income per common share (in thousands, except for per share data) is as follows: Three months ended 2021 2020 Net income $ 3,456 $ 7,961 Less: net income allocated to participating securities 204 321 Net income available to common shareholders $ 3,252 $ 7,640 Weighted average common shares outstanding — basic 7,985,000 7,882,000 Effect of dilutive securities 7,000 — Weighted average common and potentially issuable common shares outstanding — diluted 7,992,000 7,882,000 Basic net income per common share $ 0.41 $ 0.97 Diluted net income per common share $ 0.41 $ 0.97 The computation of basic and diluted net income per participating shares is as follows (in thousands, except for per share data): Three months ended 2021 2020 Net income allocated to participating securities $ 204 $ 321 Weighted average participating shares outstanding — basic 500,000 338,000 Effect of dilutive securities — — Weighted average common and potentially issuable common shares outstanding — diluted 500,000 338,000 Basic net income per participating share $ 0.41 $ 0.97 Diluted net income per participating share $ 0.41 $ 0.97

Major Customers (Tables)

Major Customers (Tables)	3 Months Ended
	Mar. 31, 2021
Concentration Risks, Types, No Concentration Percentage [Abstract]
Schedule of Major Customers	The following table presents sales revenue for the above-mentioned customers for the three months ended March 31, 2021 and 2020 (in thousands): Three months ended 2021 2020 UFP product sales $ 10,657 $ 8,987 UFP tooling sales — — Total UFP sales 10,657 8,987 Navistar product sales 9,937 10,667 Navistar tooling sales 306 98 Total Navistar sales 10,243 10,765 Volvo product sales 10,125 7,573 Volvo tooling sales 20 1,525 Total Volvo sales 10,145 9,098 PACCAR product sales 9,354 7,949 PACCAR tooling sales 329 207 Total PACCAR sales 9,683 8,156 BRP product sales 8,568 7,247 BRP tooling sales 115 220 Total BRP sales 8,683 7,467 Other product sales 20,492 19,507 Other tooling sales 2,926 43 Total other sales 23,418 19,550 Total product sales 69,133 61,930 Total tooling sales 3,696 2,093 Total sales $ 72,829 $ 64,023

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Schedule of inventories	Inventories, net consisted of the following (in thousands): March 31, 2021 December 31, 2020 Raw materials $ 13,576 $ 11,640 Work in process 1,808 1,679 Finished goods 4,989 5,041 Total $ 20,373 $ 18,360

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Components of lease expense	The components of lease expense were as follows (in thousands): Three Months Ended 2021 2020 Operating lease cost $ 368 $ 357 Total net lease cost $ 368 $ 357
Supplemental Balance Sheet Information	Other supplemental balance sheet information related to leases was as follows (in thousands): March 31, 2021 December 31, 2020 Operating leases: Operating lease right of use assets $ 4,346 $ 2,754 Total operating lease right of use assets $ 4,346 $ 2,754 Current operating lease liabilities (A) $ 1,289 $ 1,023 Noncurrent operating lease liabilities (B) 3,017 1,670 Total operating lease liabilities $ 4,306 $ 2,693 (A) Current operating lease liabilities are included in accrued other liabilities (B) Noncurrent operating lease liabilities are included in other non-current liabilities The following table presents certain information related to lease terms and discount rates for leases as of March 31, 2021 and December 31, 2020: March 31, 2021 December 31, 2020 Weighted average remaining lease term (in years): Operating leases 4.2 3.5 Weighted average discount rate: Operating leases 5.5 % 5.9 % Other information related to leases were as follows (in thousands) : Three Months Ended 2021 2020 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases (C) $ 368 $ 357 (C) Cash flow from operating lease included in prepaid and other assets on the Consolidated Statements of Cash Flows.
Maturities of lease liabilities	As of March 31, 2021, maturities of lease liabilities were as follows (in thousands): Operating Leases 2021 (remainder of year) $ 1,130 2022 1,157 2023 1,058 2024 1,063 2025 628 Total lease payments 5,036 Less: imputed interest (730) Total lease obligations 4,306 Less: current obligations 1,289 Long-term lease obligations $ 3,017 As of December 31, 2020, maturities of lease liabilities were as follows (in thousands): Operating Leases 2021 $ 1,215 2022 811 2023 706 2024 705 2025 — Total lease payments 3,437 Less: imputed interest (744) Total lease obligations 2,693 Less: current obligations (1,023) Long-term lease obligations $ 1,670

Property, Plant & Equipment (Ta

Property, Plant & Equipment (Tables)	3 Months Ended
	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment, net consisted of the following for the periods specified (in thousands): March 31, 2021 December 31, 2020 Property, plant and equipment $ 176,942 $ 174,553 Accumulated depreciation (102,942) (100,501) Property, plant and equipment — net $ 74,000 $ 74,052

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	3 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill activity	Goodwill activity for the three months ended March 31, 2021 consisted of the following (in thousands): Balance at December 31, 2020 $ 17,376 Additions — Impairment — Balance at March 31, 2021 $ 17,376
Schedule of Intangible assets	Intangibles, net at March 31, 2021 were comprised of the following (in thousands): Definite-lived Intangible Assets Amortization Period Gross Carrying Accumulated Net Carrying Trade name 25 Years $ 250 $ (60) $ 190 Trademarks 10 Years 1,610 (516) 1,094 Non-competition agreement 5 Years 1,810 (1,161) 649 Developed technology 7 Years 4,420 (2,025) 2,395 Customer relationships 10-12 Years 9,330 (2,629) 6,701 Total $ 17,420 $ (6,391) $ 11,029 Intangibles, net at December 31, 2020 were comprised of the following (in thousands): Definite-lived Intangible Assets Amortization Period Gross Carrying Accumulated Net Carrying Trade name 25 Years $ 250 $ (58) $ 192 Trademarks 10 Years 1,610 (476) 1,134 Non-competition agreement 5 Years 1,810 (1,071) 739 Developed technology 7 Years 4,420 (1,869) 2,551 Customer relationships 10-12 Years 9,330 (2,430) 6,900 Total $ 17,420 $ (5,904) $ 11,516

Post Retirement Benefits (Table

Post Retirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
Schedule of Post Retirement Benefit Plans	The components of expense for the Company’s post-retirement benefit plans are as follows (in thousands): Three months ended 2021 2020 Pension expense: Multi-employer plan $ 189 $ 246 Defined contribution plan 302 293 Total pension expense 491 539 Health and life insurance: Interest cost 41 59 Amortization of prior service costs (124) (124) Amortization of net loss 43 45 Net periodic benefit cost (40) (20) Total post retirement benefits expense $ 451 $ 519

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Schedule Of Long-term debt	Debt consists of the following (in thousands): March 31, December 31, Wells Fargo term loans payable $ 15,791 $ 16,390 FGI term loans payable 13,069 13,148 Leaf Capital term loan payable 144 152 Total 29,004 29,690 Less deferred loan costs (1,840) (1,957) Less current portion (2,938) (2,535) Long-term debt $ 24,226 $ 25,198

Stock Based Compensation (Table

Stock Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
The status of Restricted Stock and changes	The following summarizes the status of Restricted Stock and changes during the three months ended March 31, 2021: Number of Weighted Average Grant Date Fair Value Unvested balance at December 31, 2020 507,835 $ 6.25 Granted — — Vested (11,158) 3.38 Forfeited — — Unvested balance at March 31, 2021 496,677 $ 6.00
Schedule of stock appreciation rights activity	A summary of the Company's stock appreciation rights activity for the three months ended March 31, 2021 is as follows: Number of Weighted Average Grant Date Fair Value Outstanding as of December 31, 2020 180,925 $ 2.57 Granted — — Exercised — — Forfeited — — Outstanding at end of the period ended March 31, 2021 180,925 $ 2.57 Exercisable at end of the period ended March 31, 2021 73,888 $ 2.57

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of unrealized and realized gain (loss) recognized in Accumulated Other Comprehensive Income (Loss)	The following tables summarize the amount of unrealized and realized gain (loss) recognized in Accumulated Other Comprehensive Income (Loss) ("AOCI") for the three months ended March 31, 2021 and 2020 (in thousands): Derivatives in Amount of Unrealized Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) (A) Amount of Realized Gain 2021 2020 2021 2020 Foreign exchange $ — $ (1,745) Cost of goods sold $ — $ (58) Selling, general and administrative expense $ — $ (13) Interest rate swaps $ — $ (833) Interest expense $ — $ (50) (A) The foreign currency derivative activity reclassified from Accumulated Other Comprehensive Income (Loss) is allocated to cost of goods sold and selling, general and administrative expense based on the percentage of foreign currency spend.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents changes in Accumulated Other Comprehensive Income (Loss), net of tax, for the three months ended March 31, 2021 and 2020 (in thousands): 2020: Derivative Post Retirement Benefit Plan Items (A) Accumulated Balance at December 31, 2019 $ (191) $ 1,561 $ 1,370 Other comprehensive loss before reclassifications (2,578) — (2,578) Amounts reclassified from accumulated other comprehensive income (loss) 121 (79) 42 Income tax benefit 538 17 555 Balance at March 31, 2020 $ (2,110) $ 1,499 $ (611) 2021: Balance at December 31, 2020 $ — $ 1,375 $ 1,375 Other comprehensive loss before reclassifications — — — Amounts reclassified from accumulated other comprehensive income (loss) — (81) (81) Income tax benefit — 17 17 Balance at March 31, 2021 $ — $ 1,311 $ 1,311

Basis of Presentation (Details)

Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2021reportingUnitsegment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments | segment	1
Number of reporting units | reportingUnit	1

Critical Accounting Policies _3

Critical Accounting Policies and Estimates (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Unusual or Infrequent Item, or Both [Line Items]
Allowance for doubtful accounts	$ 51,000		$ 41,000
Accounts receivable for chargebacks	402,000		179,000
Allowance for slow moving and obsolete inventory	451,000		546,000
Recorded contract assets	549,000		554,000
Amount of revenue from contract liabilities related to open jobs outstanding	2,710,000
Impairment of long-lived assets	0	$ 0
Estimated liability for compensation claims	763,000		933,000
Liability for post retirement healthcare benefits	9,048,000		$ 9,109,000
Contract-based intangible assets
Unusual or Infrequent Item, or Both [Line Items]
Impairment on contract assets	$ 0

Net Income Per Common Share (De

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Available to Common Stockholders
Net income	$ 3,456	$ 7,961
Less: net income allocated to participating securities	204	321
Net income available to common shareholders	$ 3,252	$ 7,640
Weighted average common shares outstanding - basic (in shares)	7,985,000	7,882,000
Effect of dilutive securities (in shares)	7,000	0
Weighted average common and potentially issuable common shares outstanding - diluted (in shares)	7,992,000	7,882,000
Basic net income per share (in dollars per share)	$ 0.41	$ 0.97
Diluted net income per share (in dollars per share)	$ 0.41	$ 0.97
Participating Securities
Net Income (Loss) Available to Common Stockholders
Less: net income allocated to participating securities	$ 204	$ 321
Weighted average common shares outstanding - basic (in shares)	500,000	338,000
Effect of dilutive securities (in shares)	0	0
Weighted average common and potentially issuable common shares outstanding - diluted (in shares)	500,000	338,000
Basic net income per share (in dollars per share)	$ 0.41	$ 0.97
Diluted net income per share (in dollars per share)	$ 0.41	$ 0.97

Major Customers (Details)

Major Customers (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)customer	Mar. 31, 2020USD ($)
Revenue, Major Customer [Line Items]
Number of major customers | customer	5
Net sales	$ 72,829	$ 64,023
Product
Revenue, Major Customer [Line Items]
Net sales	69,133	61,930
Tooling
Revenue, Major Customer [Line Items]
Net sales	3,696	2,093
UFP
Revenue, Major Customer [Line Items]
Net sales	10,657	8,987
UFP | Product
Revenue, Major Customer [Line Items]
Net sales	10,657	8,987
UFP | Tooling
Revenue, Major Customer [Line Items]
Net sales	0	0
Navistar
Revenue, Major Customer [Line Items]
Net sales	10,243	10,765
Navistar | Product
Revenue, Major Customer [Line Items]
Net sales	9,937	10,667
Navistar | Tooling
Revenue, Major Customer [Line Items]
Net sales	306	98
Volvo
Revenue, Major Customer [Line Items]
Net sales	10,145	9,098
Volvo | Product
Revenue, Major Customer [Line Items]
Net sales	10,125	7,573
Volvo | Tooling
Revenue, Major Customer [Line Items]
Net sales	20	1,525
PACCAR
Revenue, Major Customer [Line Items]
Net sales	9,683	8,156
PACCAR | Product
Revenue, Major Customer [Line Items]
Net sales	9,354	7,949
PACCAR | Tooling
Revenue, Major Customer [Line Items]
Net sales	329	207
BRP
Revenue, Major Customer [Line Items]
Net sales	8,683	7,467
BRP | Product
Revenue, Major Customer [Line Items]
Net sales	8,568	7,247
BRP | Tooling
Revenue, Major Customer [Line Items]
Net sales	115	220
Other Customers
Revenue, Major Customer [Line Items]
Net sales	23,418	19,550
Other Customers | Product
Revenue, Major Customer [Line Items]
Net sales	20,492	19,507
Other Customers | Tooling
Revenue, Major Customer [Line Items]
Net sales	$ 2,926	$ 43

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 13,576	$ 11,640
Work in process	1,808	1,679
Finished goods	4,989	5,041
Total	$ 20,373	$ 18,360

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Options to extend the lease, period	5 years
Lease, Cost [Abstract]
Operating lease cost	$ 368	$ 357
Total net lease cost	368	357
Assets and Liabilities, Lessee [Abstract]
Operating lease right of use assets	4,346		$ 2,754
Current operating lease liabilities	$ 1,289		$ 1,023
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent		us-gaap:OtherAccruedLiabilitiesCurrent
Noncurrent operating lease liabilities	$ 3,017		$ 1,670
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities		Other non-current liabilities
Total operating lease liabilities	$ 4,306		$ 2,693
Weighted average remaining lease term, Operating leases	4 years 2 months 12 days		3 years 6 months
Weighted average discount rate, Operating leases	5.50%		5.90%
Cash Flow, Operating Activities, Lessee [Abstract]
Operating cash flows from operating leases	$ 368	$ 357
Lessee, Operating Lease, Description [Abstract]
Operating leases to be paid in remainder of fiscal year	1,130
Operating leases to be paid in next twelve months			$ 1,215
Operating leases to be paid in year one	1,157
Operating leases to be paid in year two	1,058		811
Operating leases to be paid in year three	1,063		706
Operating leases to be paid in year four	628		705
Operating leases to be paid in year five			0
Total lease payments	5,036		3,437
Less: imputed interest	(730)		(744)
Total operating lease liabilities	4,306		2,693
Less: current obligations	1,289		1,023
Long-term lease obligations	$ 3,017		$ 1,670
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	4 years

Property, Plant & Equipment (De

Property, Plant & Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property, plant and equipment	$ 176,942		$ 174,553
Accumulated depreciation	(102,942)		(100,501)
Property, plant and equipment — net	74,000		74,052
Depreciation expense	2,482	$ 2,269
Capital additions in progress	2,543		1,422
Purchase commitments for capital expenditures in progress	$ 5,041		$ 677

Goodwill and Intangibles - Good

Goodwill and Intangibles - Goodwill activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 17,376
Additions	0
Impairment	0
Ending balance	$ 17,376

Goodwill and Intangibles - Defi

Goodwill and Intangibles - Definite-lived Intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 17,420		$ 17,420
Accumulated Amortization	(6,391)		(5,904)
Net Carrying Amount	11,029		$ 11,516
Intangible asset amortization expense	$ 487	$ 487
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	25 years		25 years
Gross Carrying Amount	$ 250		$ 250
Accumulated Amortization	(60)		(58)
Net Carrying Amount	$ 190		$ 192
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years		10 years
Gross Carrying Amount	$ 1,610		$ 1,610
Accumulated Amortization	(516)		(476)
Net Carrying Amount	$ 1,094		$ 1,134
Non-competition agreement
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	5 years		5 years
Gross Carrying Amount	$ 1,810		$ 1,810
Accumulated Amortization	(1,161)		(1,071)
Net Carrying Amount	$ 649		$ 739
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	7 years		7 years
Gross Carrying Amount	$ 4,420		$ 4,420
Accumulated Amortization	(2,025)		(1,869)
Net Carrying Amount	2,395		2,551
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,330		9,330
Accumulated Amortization	(2,629)		(2,430)
Net Carrying Amount	$ 6,701		$ 6,900
Customer relationships | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years		10 years
Customer relationships | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	12 years		12 years

Post Retirement Benefits (Detai

Post Retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pension, health and life insurance expense:
Multi-employer plan	$ 189	$ 246
Defined contribution plan	302	293
Total pension expense	491	539
Interest cost	41	59
Amortization of prior service costs	(124)	(124)
Amortization of net loss	43	45
Net periodic benefit cost	(40)	(20)
Total post retirement benefits expense	451	$ 519
Pension Plan
Pension, health and life insurance expense:
Payments made to pension plans	201
Pension plan payments expected to be made in fiscal year	1,599
Pension plan payments accrued	774
Other Postretirement Benefits Plan
Pension, health and life insurance expense:
Payments for post retirement healthcare and life insurance	101
Pension plan payments expected to be made in fiscal year	1,185
Pension plan payments accrued	$ 1,185

Debt - Schedule of Debt Instrum

Debt - Schedule of Debt Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total	$ 29,004	$ 29,690
Less deferred loan costs	(1,840)	(1,957)
Less current portion	(2,938)	(2,535)
Long-term debt	24,226	25,198
Wells Fargo term loans payable
Debt Instrument [Line Items]
Total	15,791	16,390
FGI term loans payable
Debt Instrument [Line Items]
Total	13,069	13,148
Leaf Capital term loan payable
Debt Instrument [Line Items]
Total	$ 144	$ 152

Debt - Term Loans (Narrative) (

Debt - Term Loans (Narrative) (Details) - USD ($)	Oct. 28, 2020	Oct. 27, 2020	Oct. 20, 2020	Apr. 24, 2020	Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Principal amount advanced					$ 688,000	$ 1,125,000
Loans Payable | Wells Fargo term loans payable
Debt Instrument [Line Items]
Principal amount		$ 18,500,000
Weighted average interest rate					3.77%
Monthly installments		$ 200,000
Loans Payable | Wells Fargo term loans payable | Keybank National Association
Debt Instrument [Line Items]
Principal amount advanced	$ 16,790,000
Loans Payable | Wells Fargo term loans payable | LIBOR
Debt Instrument [Line Items]
Basis points		3.00%
Stated interest rate		0.75%
Loans Payable | Wells Fargo term loans payable | LIBOR | Minimum
Debt Instrument [Line Items]
Basis points		1.00%
Loans Payable | Wells Fargo term loans payable | Base Rate
Debt Instrument [Line Items]
Basis points		2.00%
Stated interest rate		1.00%
Loans Payable | Wells Fargo term loans payable | Federal Funds Rate
Debt Instrument [Line Items]
Basis points		0.50%
Loans Payable | FGI term loans payable
Debt Instrument [Line Items]
Principal amount			$ 13,200,000
Stated interest rate			8.25%
Security deposit		$ 1,200,000
Final payment			$ 1,446,000
Prepayment fee			20.00%
Loans Payable | FGI term loans payable | Period One
Debt Instrument [Line Items]
Monthly installments			$ 117,000
Debt term			12 months
Prepayment fee			4.00%
Loans Payable | FGI term loans payable | Period Two
Debt Instrument [Line Items]
Monthly installments			$ 246,000
Debt term			59 months
Prepayment fee			3.00%
Loans Payable | FGI term loans payable | Period Three
Debt Instrument [Line Items]
Prepayment fee			2.00%
Loans Payable | FGI term loans payable | Period Four
Debt Instrument [Line Items]
Prepayment fee			1.00%
Loans Payable | FGI term loans payable | Keybank National Association
Debt Instrument [Line Items]
Principal amount advanced		$ 12,000,000
Loans Payable | Leaf Capital term loan payable
Debt Instrument [Line Items]
Principal amount				$ 175,000
Stated interest rate				5.50%
Debt term				60 months

Debt - Revolving Loans (Narrati

Debt - Revolving Loans (Narrative) (Details) - USD ($)	Oct. 28, 2020	Oct. 27, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Principal amount advanced			$ 688,000	$ 1,125,000
Loan balance			29,004,000		$ 29,690,000
Wells Fargo term loans payable
Debt Instrument [Line Items]
Loan balance			15,791,000		$ 16,390,000
Revolving Credit Facility | Incremental Revolving Commitment
Debt Instrument [Line Items]
Revolving loan commitment		$ 10,000,000
Debt term		3 years
Revolving Credit Facility | Wells Fargo term loans payable
Debt Instrument [Line Items]
Revolving loan commitment		$ 25,000,000
Weighted average interest rate		3.25%
Available rate revolving loans			24,278,000
Line of credit outstanding			3,001,000
Letters of credit outstanding			$ 160,000
Revolving Credit Facility | Wells Fargo term loans payable | Letter of Credit
Debt Instrument [Line Items]
Revolving loan commitment		$ 2,000,000
Revolving Credit Facility | Wells Fargo term loans payable | Investment Grade | Accounts Receivable
Debt Instrument [Line Items]
Eligible investment grade		90.00%
Revolving Credit Facility | Wells Fargo term loans payable | Investment Grade | Inventories
Debt Instrument [Line Items]
Eligible investment grade		65.00%
Revolving Credit Facility | Wells Fargo term loans payable | Non Investment Grade | Accounts Receivable
Debt Instrument [Line Items]
Eligible investment grade		85.00%
Revolving Credit Facility | Wells Fargo term loans payable | Keybank National Association
Debt Instrument [Line Items]
Principal amount advanced	$ 8,745,000
Revolving Credit Facility | Keybank National Association
Debt Instrument [Line Items]
Loan balance				$ 7,776,000
Variable interest rate				6.62%
Revolving Credit Facility | LIBOR | Wells Fargo term loans payable
Debt Instrument [Line Items]
Basis points		1.00%
Revolving Credit Facility | LIBOR | Wells Fargo term loans payable | Minimum
Debt Instrument [Line Items]
Basis points		2.00%
Stated interest rate		0.75%
Revolving Credit Facility | LIBOR | Wells Fargo term loans payable | Maximum
Debt Instrument [Line Items]
Basis points		2.50%
Revolving Credit Facility | Base Rate | Wells Fargo term loans payable | Minimum
Debt Instrument [Line Items]
Basis points		1.00%
Stated interest rate		1.00%
Revolving Credit Facility | Base Rate | Wells Fargo term loans payable | Maximum
Debt Instrument [Line Items]
Basis points		1.50%
Revolving Credit Facility | Federal Funds Rate | Wells Fargo term loans payable
Debt Instrument [Line Items]
Basis points		0.50%
Loans Payable | Wells Fargo term loans payable
Debt Instrument [Line Items]
Weighted average interest rate			3.77%
Loans Payable | Wells Fargo term loans payable | Keybank National Association
Debt Instrument [Line Items]
Principal amount advanced	$ 16,790,000
Loans Payable | Keybank National Association
Debt Instrument [Line Items]
Loan balance				$ 37,125,000
Variable interest rate				7.50%
Loans Payable | LIBOR | Wells Fargo term loans payable
Debt Instrument [Line Items]
Basis points		3.00%
Stated interest rate		0.75%
Loans Payable | LIBOR | Wells Fargo term loans payable | Minimum
Debt Instrument [Line Items]
Basis points		1.00%
Loans Payable | Base Rate | Wells Fargo term loans payable
Debt Instrument [Line Items]
Basis points		2.00%
Stated interest rate		1.00%
Loans Payable | Federal Funds Rate | Wells Fargo term loans payable
Debt Instrument [Line Items]
Basis points		0.50%

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Deferred tax asset	$ 663,000
Deferred tax liability	883,000
Unrecognized tax benefits	0		$ 0
Income tax expense (benefit)	$ 1,351,000	$ (4,854,000)
Effective tax rate	28.10%	156.00%
Income tax benefit from CARES Act		$ 5,638,000
Valuation allowance against net deferred tax assets		3,267,000
Income tax refund		$ 2,371,000
Income taxes rate		34.00%

Stock Based Compensation - Narr

Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	3,000,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Applicable vesting period	3 years
Unrecognized compensation expense	$ 1,325	$ 1,292
Expected weighted-average term	1 year 10 months 24 days
Shares surrendered (in shares)	3,874	0
Restricted Stock | Selling, general and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	$ 289	$ 292
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Applicable vesting period	3 years
Unrecognized compensation expense	$ 149	292
Expected weighted-average term	5 years
Grant price (in USD per share)	$ 10
Average remaining contractual term	3 years 1 month 6 days
Aggregate intrinsic value	$ 313
Weighted-average period costs are expected to be recognized	1 year 1 month 6 days
Stock Appreciation Rights (SARs) | Selling, general and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	$ 30	$ 24

Stock Based Compensation - Rest

Stock Based Compensation - Restricted Stock (Details) - Restricted Stock - $ / shares	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Number of Shares, Restricted Stock
Unvested beginning balance (in shares)	507,835
Granted (in shares)	0
Vested (in shares)	(11,158)
Forfeited (in shares)	0
Unvested ending balance (in shares)	496,677
Weighted Average Grant Date Fair Value, Restricted Stock
Unvested beginning balance (in dollars per share)	$ 6	$ 6.25
Granted (in dollars per share)	0
Vested (in dollars per share)	3.38
Forfeited (in dollars per share)	0
Unvested beginning balance (in dollars per share)	$ 6

Stock Based Compensation - Stoc

Stock Based Compensation - Stock Appreciation Rights (Details) - Stock Appreciation Rights (SARs)	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Number of Shares
Beginning Balance (in shares) | shares	180,925
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Forfeited (in shares) | shares	0
Ending Balance (in shares) | shares	180,925
Exercisable at the end of period (in shares) | shares	73,888
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 2.57
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	0
Ending balance (in dollars per share) | $ / shares	2.57
Exercisable at the period end (in dollars per share) | $ / shares	$ 2.57

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	$ 0	$ (1,745)
Foreign exchange contracts | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Realized Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	0	(58)
Foreign exchange contracts | Selling, general and administrative expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Realized Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	0	(13)
Interest rate swaps:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	0	(833)
Interest rate swaps: | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Realized Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	$ 0	$ (50)

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 93,932	$ 84,426
Other comprehensive loss before reclassifications	0	(2,578)
Amounts reclassified from accumulated other comprehensive income (loss)	(81)	42
Income tax benefit	17	555
Ending Balance	97,595	90,722
Derivative Hedging Activities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	0	(191)
Other comprehensive loss before reclassifications	0	(2,578)
Amounts reclassified from accumulated other comprehensive income (loss)	0	121
Income tax benefit	0	538
Ending Balance	0	(2,110)
Post Retirement Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,375	1,561
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(81)	(79)
Income tax benefit	17	17
Ending Balance	1,311	1,499
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,375	1,370
Ending Balance	$ 1,311	$ (611)