Summary of Significant Accounting Polices - Additional Information (Details)	12 Months Ended
	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