DOCUMENT AND ENTITY INFORMATION (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Jan. 07, 2013	Mar. 31, 2012
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		14,815,154
Document Type	10-K
Amendment Flag	true
Document Period End Date	Sep. 30, 2012
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2012
Entity Well-Known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 14,540,993
Amendment Description	Explanatory Note We are filing this Form 10-K/A Amendment No. 1 (the “Amendment”) to our Annual Report on Form 10-K for the fiscal year ended September 30, 2012 (the “Original Filing”) to correct the following clerical errors: 1. Net cash provided by operating activities contained in Part I, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations and in the Consolidated Statements of Cash Flows in Part I, Item 8, Financial Statements and Supplementary Data. The previously reported amount of net cash provided by operating activities for the fiscal year ended September 30, 2012 was $741,915 and the correct amount of such net cash provided by operating activities was $693,054. 2. Certain balance sheet captions for 2011 contained in the Consolidated Balance Sheets in Part 1 Item 8, Financial Statements and Supplementary Data. The previously reported subtotals for Total other assets, Total Assets, Total long-term liabilities, and Total Liabilities and Stockholders’ Equity of $20,086,302, $40,813,752, $10,254,758 and $40,813,752, respectively were incorrect; the corrected amounts are $20,139,133, $40,866,583, $10,307,589 and $40,866,583, respectively. 3. Future amortization expense in Note 6—Intangible Assets contained in the Item 8, Financial Statements and Supplementary Data. The table showing estimated amortization expense for the next five fiscal years for Trade Names included an incorrect amount of $422,213 in the “Thereafter” column. The corrected amount is $81,992. This Form 10-K/A should be read in conjunction with the original Form 10-K. Except as specifically noted above, this Amendment does not amend, modify or update any financial statements or other disclosures contained in the Original Filing. Accordingly, this Amendment does not reflect events occurring after the Original Filing on January 15, 2013.