Equity Investment in Unconsolidated Subsidiary - Additional Information (Details) - USD ($)			12 Months Ended
	Nov. 07, 2019	Nov. 06, 2019	Dec. 31, 2019
SPAC [Member]
Schedule Of Equity Method Investments [Line Items]
Amount raised through offering	$ 172,500,000
Shares sold in the offering	17,250,000
LGL Systems Acquisition Holdings Company, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Contribution to fund purchase of private warrants		$ 3,350,000
Percentage of risk capital contributed to effect IPO		62.20%
Percentage of sponsorship owned			43.57%
Equity losses			$ 26,000
LGL Systems Acquisition Holdings Company, LLC [Member] | SPAC [Member]
Schedule Of Equity Method Investments [Line Items]
Warrant exercise/ strike price			$ 11.50
Percentage of sponsorship owned			20.00%
Class of warrants held			5,200,000
Number of restricted and non-tradeable shares held			4,312,500
LGL Systems Acquisition Holdings Company, LLC [Member] | Private Placement [Member]
Schedule Of Equity Method Investments [Line Items]
Purchase of private warrants		$ 5,200,000
Warrant exercise/ strike price		$ 11.50
LGL Systems Acquisition Holdings Company, LLC [Member] | Common Stock [Member] | Private Placement [Member]
Schedule Of Equity Method Investments [Line Items]
Warrant exercisable to purchase common stock		1