Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Oct. 01, 2019
Warranty, Term (Day)	30 days
Capitalized Software Development Costs Amortization Period (Year)	3 years
Capitalized Computer Software, Additions	$ 0	$ 11
Number of Reporting Units	1
Impairment of Long-Lived Assets Held-for-use	$ 0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total	$ (43)	13
Number of Reportable Segments	1
Advertising Expense	$ 149	425
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Operating Lease, Discount Rate, Percent			7.00%
Operating Lease, Right-of-Use Asset	$ 294
Operating Lease, Liability, Total	294
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 545
Operating Lease, Liability, Total			$ 545
Prepaid Tax [Member] | ATM [Member]
Tax Credit Carryforward, Amount	$ 23
Internal Use Software [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Minimum [Member]
Payment Terms (Day)	30 days
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum [Member]
Payment Terms (Day)	45 days
Property, Plant and Equipment, Useful Life (Year)	5 years