Commitments (Details Textual)	3 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 EUR (€)	Aug. 14, 2002 USD ($)
Other Commitments [Line Items]
Lessee, Operating Lease, Term of Contract	5 years
Rent expense on lease agreements	$ 53,000	$ 60,000
Equity Method Investments	0		$ 46,456
Impairment Loss	30,000
Joint venture agreement [Member]
Other Commitments [Line Items]
Equity Method Investments Committed Capital | €					€ 120,000
Equity Method Investment, Ownership Percentage				30.00%	30.00%
Equity Method Investments				$ 67,000
Director and Officer [Member] | Royalty Agreements [Member]
Other Commitments [Line Items]
Royalty percentage of gross receipts over base amount						5.00%
Gross receipt base amount for royalty calculation						$ 500,000
Royalty expense	0	0
401(k) Retirement Savings Plan [Member]
Other Commitments [Line Items]
Employer contributions	$ 15,000	$ 19,000
Annual non-elective safe harbor employer contribution	3.00%
Three buildings and facilities used in its operations [Member]
Other Commitments [Line Items]
Lessee, Operating Lease, Renewal Term	5 years
Facilities used for executive offices and laboratories [Member]
Other Commitments [Line Items]
Lessee, Operating Lease, Renewal Term	2 years
Undeveloped land in Baja, Mexico
Other Commitments [Line Items]
Lessee, Operating Lease, Renewal Term	3 years
Leasehold Improvements [Member]
Other Commitments [Line Items]
Purchase obligations	$ 71,000