Note 2 - Summary of Significant Accounting Policies - Subsidiaries (Details)	12 Months Ended
	Dec. 31, 2023
Precise Time and Frequency, LLC [Member] | DELAWARE
Ownership Percentage, Parent	100.00%
P3 Logistic Solutions LLC [Member] | DELAWARE
Ownership Percentage, Parent	100.00%
Lynch Capital International, LLC [Member] | DELAWARE
Ownership Percentage, Parent	100.00%
LGL Systems Acquisition Holding Company, LLC [Member] | DELAWARE
Ownership Percentage, VIE	34.80%	[1]
Lynch Systems Acquisition Holdings Company, LLC [Member] | DELAWARE
Ownership Percentage, Parent	100.00%
L G L Systems Nevada Management Partners L L C [Member] | NEVADA
Ownership Percentage, Parent	1.00%	[2]

[1] Entity is a consolidated VIE

[2] Entity is an unconsolidated VIE