Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 5,895	$ 4,659
Accounts receivable	69	69
Inventory	966	883
Intangibles	2,370	1,259
Accrued expenses	334	132
Stock options	5	14
Investment in equity method investee	0	100
Other	64	0
Total deferred tax assets		7,116
Deferred tax liabilities:
Financial basis in excess of tax basis of certain assets	815	416
Other	365	323
Total deferred tax liabilities	1,180	739
Less valuation allowance	8,523	6,377
Net deferred taxes	$ 0	$ 0