Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reconciliation of Income Tax Expense (Benefit)) (Details)

v3.21.2
Income Taxes (Reconciliation of Income Tax Expense (Benefit)) (Details) - USD ($)
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Income Tax Expense (Benefit) [Line Items]    
Income tax (benefit) expense at U.S. federal statutory rates $ 895,699 $ (4,210,916)
State income tax (benefit) expense, net of federal (benefit) expense 69,353 (326,045)
Non-deductible expenses - other 137,003 114,699
U.S. research and development tax credit (2,761,415)  
Effect of common stock purchase warrants exercised (3,848,412)  
Effect of Paycheck Protection Program funds (113,442)  
Effect of foreign income tax rates 461,177 238,645
Effect of global intangible low taxed income 219,167 143,219
Change in valuation allowance 5,505,271 4,244,531
Other, net 52,708 54,689
Income tax (benefit) expense $ (3,129,138) $ (1,078,441)
Tax Rate, Income tax expense (benefit) at U.S. federal statutory rates 21.00% 21.00%
Tax Rate, State income tax expense (benefit), net of federal benefits 1.60% 1.60%
Tax Rate, Non-deductible expenses - other 3.20% (0.60%)
Tax Rate, U.S. research and development tax credit (64.70%)  
Tax Rate, Effect of foreign income tax rates 10.80% (1.20%)
Tax Rate, Effect of common stock options and warrants exercised (90.20%)  
Tax Rate, Effect of Paycheck Protection Program funds (2.70%)  
Tax Rate, Effect of global intangible low-taxed income 5.10% (0.70%)
Tax Rate, Change in valuation allowance 129.10% (21.20%)
Tax Rate, Other net 1.20% (0.20%)
Income tax benefit (73.40%) 5.40%
U.K. [Member]    
Income Tax Expense (Benefit) [Line Items]    
Effect of foreign income tax rates $ (3,746,247) $ (1,337,263)
Income tax (benefit) expense $ (3,000,000.0)  
Tax Rate, Effect of change in tax rate (87.80%) 6.70%