Reconciliation of Actual Income Tax Expenses (Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Expense for U.S federal income tax at statutory rate	$ (2,834)	$ (3,484)
Effect of foreign income taxes	1	(64)
Research and experimentation tax credit	(223)	(1,201)
State income taxes, net of federal income tax benefit	153	(158)
Nondeductible expenses	44	63
Change in valuation allowance	2,893	4,882
Impact on deferred taxes due to change in tax rate	563	196
Change in fair value of contingent consideration	(569)	214
Foreign income tax withholding	419	1,928
Disallowance of stock compensation adjustments in excess of book	334	255
Other items	(203)	18
Income tax expense	$ 578	$ 2,649
Effective tax rate	(4.30%)	(16.00%)