Debt (Details Textual) (USD $)	12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended	0 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Santander Bank [Member]	Sep. 30, 2013 Bank One [Member]	Sep. 30, 2012 Bank One [Member]	Sep. 30, 2013 Bank Two [Member]	Sep. 30, 2012 Bank Two [Member]	Sep. 30, 2013 Masschusetts Capital Resource Corporation [Member]	Sep. 30, 2012 Masschusetts Capital Resource Corporation [Member]	Sep. 30, 2013 Masschusetts Capital Resource Corporation [Member] Santander Bank [Member]	Sep. 30, 2013 Ithaca Urban Renewal Agency [Member]	Sep. 30, 2012 Ithaca Urban Renewal Agency [Member]	Sep. 30, 2013 Internal Revenue Service (IRS) [Member]	Jun. 07, 2012 Entine Promissory Notes [Member]	Sep. 30, 2012 Entine Promissory Notes [Member]	Aug. 31, 2012 Entine Promissory Notes [Member]	Jul. 31, 2012 Note Purchase Agreement [Member]	Sep. 30, 2013 Note Purchase Agreement [Member]	Feb. 27, 2012 Gerald Entine [Member]	Sep. 30, 2013 Term Loan [Member]	Sep. 30, 2013 Working Capital Line Of Credit [Member]	Sep. 30, 2013 Acquisition Line Of Credit [Member]	Sep. 30, 2013 Acquisition Line Of Credit [Member] Hilger Crystals [Member]	Jul. 31, 2010 Acquisition Line Of Credit [Member] Hilger Crystals [Member]
Debt [Line Items]
Stock Repurchased During Period, Shares		928,773																	928,773
Notes Payable, Total	$ 9,819,048	$ 11,984,492		$ 4,928,572	$ 6,214,286	$ 1,890,476	$ 2,761,905	$ 3,000,000	$ 3,000,000		$ 0	$ 8,301				$ 1,857,546			$ 1,857,546
Proceeds From Issuance Of Common Stock	21,009	63,122													2,000,000
Proceeds from Convertible Debt																	3,000,000
Purchase Price Of Subordinate Debt																	3,000,000
Debt Instrument, Maturity Date																		Jul. 31, 2017		Jul. 07, 2015			Jul. 07, 2015
Debt Instrument Redemption Value																		130,434
Repayments of Notes Payable														1,857,546
Description Of Consolidated Maximum Leverage Ratio	For the Consolidated Maximum Leverage Ratio (Consolidated Total Funded Debt to Consolidated EBITDA, as defined in the Amendment), the Amendment (i) revised the required ratio for September 30, 2012 from 3.25x to 4.5x; (ii) revised the required ratio for December 31, 2012 from 3.00x to 4.5x; and (iii) revised the required ratio for March 31, 2013 and for each rolling four quarters thereafter from 3.00x to 4.0x.
Description Of Consolidated Fixed Charge Coverage Ratio	For the Consolidated Fixed Charge Coverage Ratio, the Amendment (i) revised the required ratio for September 30, 2012 from 1.10x to 1.00x; (ii) revised the required ratio for December 31, 2012 from 1.20x to 1.00x; (iii) revised the required ratio for March 31, 2013 from 1.20x to 1.05x; (iv) revised the required ratio at June 30, 2013 from 1.20x to 1.10x; and (v) did not change the required ratio at September 30, 2013 (remained at 1.20x).
Interest and Debt Expense, Total													75,000
Debt Instrument, Interest Rate Terms						LIBOR plus 3.5%															interest rate of Prime or one month LIBOR plus 2.75%	interest rate of one month LIBOR plus 3.5%
Line of Credit Facility, Maximum Borrowing Capacity																				9,000,000	3,000,000	5,000,000
Credit Facility Term	5 years													3 years								7 years
Debt Instrument, Interest Rate, Stated Percentage				5.58%		3.68%	3.79%			10.00%				10.00%				10.00%		5.58%
Debt Instrument, Frequency of Periodic Payment																				monthly
Debt Instrument, Fee																					a monthly fee calculated at the rate of 0.25% per annum of the unused Working Capital Line of Credit	a monthly fee calculated at the rate of 0.25% per annum of the unused Acquisition Line of Credit
Business Acquisition Purchases Price Allocation Notes Payable And Long Term Debt																								4,000,000
Debt Instrument, Periodic Payment, Principal				107,143		47,619		25,000		300,000	26,640												47,619
Obligation Under Bank Loan Agreement																				Dynasil's obligations under the Bank Loan Agreement are guaranteed by EMF, Optometrics, Dynasil Products, RMD Research and Dynasil and each of such subsidiaries have granted the bank a security interest in substantially all its personal property.In addition, EMF has granted a mortgage in the Bank's favor as to EMF's leasehold property in Ithaca, New York and 65% of the outstanding shares of Hilger are pledged as collateral to the Bank. The Bank Loan Agreement also requires maintenance of certain financial and nonfinancial covenants.
Debt Instrument, Covenant Description	The Amendment requires the Company to maintain a Consolidated Maximum Adjusted Leverage Ratio equal to or less than (i) 3.25x to 1.00x for each of the rolling four quarter periods ending on September 30, 2012 and December 31, 2012, and (ii) 3.00x to 1.00x for each rolling four quarter period ending on or after March 31, 2013.
Debt Instrument, Face Amount																				107,143
Debt Instrument, Annual Principal Payment			$ 2,200,000