Represents number of participants in multi employer plans collective bargaining arrangement.

No definition available.

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- Definition

Number of entity's employees covered by collective-bargaining arrangement (CBA) to all participants in multiemployer pension plan, subject to expiration in next twelve months.

+ References

No definition available.

+ Details

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- Definition

Represents number of Major Customers.

+ References

No definition available.

+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

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- Definition

Percentage of entity's employees covered by collective-bargaining arrangement (CBA) to all entity's employees in multiemployer pension plan determined to be individually significant.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

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Balance Type:	na
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- Definition

Percentage of entity's employees covered by collective-bargaining arrangement (CBA) to all participants in multiemployer pension plan determined to be individually significant.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

+ Details

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Balance Type:	credit
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- Definition

The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(3,4))
-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

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Balance Type:	debit
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Note 1 - Organization and Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019
Number of Operating Segments	2
Standard and Extended Product Warranty Accrual, Ending Balance	$ 659,000	$ 638,000
Product Warranty Expense	$ 252,000	$ 294,000
Multi Employer Plans Collective Bargaining Arrangement Number of Participants	404
Multiemployer Plan, Employees Covered by Collective-Bargaining Arrangement, Subject to Expiration in 12 Months	29
Employee Benefit Related Adjustments Mexico [Member]
Multi Employer Plans Collective Bargaining Arrangement Number of Participants	375
Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Entity's Employees, Percentage	59.00%
Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Participants, Percentage	55.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Three Customers [Member]
Concentration Risk, Percentage	50.00%
Number of Major Customers	3
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer Detroit Diesel [Member]
Concentration Risk, Percentage	25.00%	14.00%	10.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer ADI [Member]
Concentration Risk, Percentage	13.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer Subcom [Member]
Concentration Risk, Percentage	11.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Four Customers [Member]
Concentration Risk, Percentage		53.00%
Number of Major Customers		4
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer Sistemas [Member]
Concentration Risk, Percentage		17.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| CECO Peerless [Member]
Concentration Risk, Percentage		11.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Tremec [Member]
Concentration Risk, Percentage		11.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Customer Detroit Diesel [Member]
Concentration Risk, Percentage	18.00%	12.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Customer Sistemas [Member]
Concentration Risk, Percentage	21.00%	14.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Northrop Grumman [Member]
Concentration Risk, Percentage	16.00%	22.00%
Machinery, Equipment, Furniture, and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Machinery, Equipment, Furniture, and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Capitalized Implementation Costs [Member]
Prepaid Expense and Other Assets	$ 89,000	$ 60,000