Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011	Mar. 29, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	Lattice INC
Entity Central Index Key	0000350644
Trading Symbol	lttc
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Well-Known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		29,839,033
Entity Public Float		$ 3,282,293.63
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY