Document And Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2019	Dec. 10, 2019	Mar. 31, 2019
Document And Entity Information
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	DYNASIL CORP OF AMERICA
Entity Voluntary Filers	Yes
Entity Public Float			$ 9,805,000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Well-known Seasoned Issuer	No
Entity Central Index Key	0000030831
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Trading Symbol	DYSL
Entity Common Stock, Shares Outstanding		15,002,905
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false