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Summary of Significant Accounting Polices - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) Segment Customer shares | Dec. 31, 2020 USD ($) Customer shares
Summary Of Significant Accounting Policies [Line Items] |  |
Depreciation expense | $ 501,000 | $ 453,000
Intangible assets carrying value | 212,000 | 287,000
Goodwill | $ 40,000 | 40,000
Term of warranty | 1 year |
Accrued warranty reserve | $ 80,000 | 21,000
Research and development costs | $ 2,212,000 | $ 2,142,000
Warrants to purchase, common stock | shares | 1,051,664 | 1,051,664
Deferred tax asset, valuation allowance reversed | $ (379,000) |
Unrecognized tax benefits | 458,000 |
Revenue concentration greater than 10% | $ 28,140,000 | $ 31,162,000
Number of identified reportable segments | Segment | 2 |
Re-measurement gain (loss) | $ 11,000 | (95,000)
Revenues [Member] | Customer Concentration Risk [Member] | Commercial Aerospace and Defense [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Revenue concentration greater than 10% | $ 7,870,000 | $ 7,810,000
Concentration risk, percentage | 28.00% | 25.10%
Revenues [Member] | Customer Concentration Risk [Member] | Defense Contract [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Revenue concentration greater than 10% | $ 3,138,000 | $ 5,550,000
Concentration risk, percentage | 11.20% | 17.80%
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Number of large customers | Customer | 4 | 4
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Four Largest Customers [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Concentration risk, percentage | 53.20% | 53.40%
Accounts receivable | $ 2,595,000 | $ 2,301,000
Options [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Securities excluded from the diluted earnings per share computation (in shares) | shares | 25,000 | 25,000
ASU 2014-09 [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Revenue, performance obligation, description of timing | The Company meets these conditions upon the Company’s satisfaction of the performance obligation, usually at the time of shipment to the customer, because control passes to the customer at that time. Our standard payment terms for customers are net due within 30 days, with a few exceptions, none regularly exceeding 60 days. |
Minimum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Equity method investment ownership percentage | 20.00% |
Percentage of sponsorship owned | 10.00% | 10.00%
Minimum [Member] | ASU 2014-09 [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Customer due days | 30 days |
Minimum [Member] | Buildings and Improvements [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Minimum [Member] | Other Fixed Assets [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Minimum [Member] | LGL Systems Acquisition Holdings Company, LLC [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Percentage of sponsorship owned | 10.00% |
Maximum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Equity method investment ownership percentage | 50.00% |
Estimated useful life of intangible assets | 10 years |
Maximum [Member] | ASU 2014-09 [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Customer due days | 60 days |
Maximum [Member] | Buildings and Improvements [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Property, Plant and Equipment, Useful Life | 35 years |
Maximum [Member] | Other Fixed Assets [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Property, Plant and Equipment, Useful Life | 10 years |

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