Document and Entity Information	6 Months Ended
	Mar. 31, 2014	May 02, 2014
Document and Entity Information
Entity Registrant Name	LIQUIDITY SERVICES INC
Entity Central Index Key	0001235468
Document Type	10-Q
Document Period End Date	Mar. 31, 2014
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		32,075,793
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2