DOCUMENT AND ENTITY INFORMATION (USD $)	12 Months Ended
	Sep. 30, 2011	Dec. 19, 2011	Mar. 31, 2011
Entity Registrant Name	DYNASIL CORP OF AMERICA
Entity Central Index Key	0000030831
Current Fiscal Year End Date	--09-30
Entity Filer Category	Smaller Reporting Company
Trading Symbol	dysl
Entity Common Stock, Shares Outstanding		15,582,893
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2011
Entity Well-Known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 29,364,388