Quarterly report pursuant to Section 13 or 15(d)

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

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Income Taxes (Reconciliation of Income Tax Expense (Benefit)) (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Income Taxes [Abstract]        
Income tax (benefit) expense at U.S. federal statutory rates $ (593,101) $ (198,166) $ 3,041,159 $ (908,354)
State income tax (benefit) expense, net of federal (benefit) expense (45,923) (15,347) 235,473 (70,347)
Effect of stock options exercised 11,279   (53,011)  
Effect of common stock purchase warrants exercised     (2,038,919)  
Effect of Paycheck Protection Program funds (26,340)   (122,226)  
Effect of foreign income tax rates 4,993 23,832 (27,577) 66,386
Effect of global intangible low taxed income (55,388) (34,331) 69,757 16,120
Change in valuation allowance 727,034 89,741 (1,005,752) 682,451
Other, net (864) 1,131 1,088 3,861
Income tax expense (benefit) $ 21,690 $ (133,140) $ 99,992 $ (209,883)