Note 14 - Share-based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($)	3 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Share-based compensation expense	$ 133,845	$ 138,461
Cost of Sales [Member]
Share-based compensation expense	4,298	6,209
Selling, General and Administrative Expenses [Member]
Share-based compensation expense	111,851	109,322
Research and Development Expense [Member]
Share-based compensation expense	$ 17,696	$ 22,930

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Subparagraph (h)(1)(i)
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