XML 68 R1.htm IDEA: XBRL DOCUMENT v3.20.1
Document And Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Mar. 19, 2020
Jun. 30, 2019
Document Information Line Items      
Entity Registrant Name TRANS LUX Corp    
Document Type 10-K    
Current Fiscal Year End Date --12-31    
Entity Common Stock, Shares Outstanding   13,446,276  
Entity Public Float     $ 249,000
Amendment Flag false    
Entity Central Index Key 0000099106    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Interactive Data Current Yes