Annual report pursuant to Section 13 and 15(d)

Income taxes - Reconciliation of Federal Statutory Income Tax Provision to Company's Actual Provision (Details)

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Income taxes - Reconciliation of Federal Statutory Income Tax Provision to Company's Actual Provision (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Line Items]    
Federal statutory income tax rate (percent) 21.00%  
Pre-tax book income   $ 3,760,508
Deferred tax past year true-up's   84,000
Change in valuation allowance $ 843,000  
Income tax provision 16,352 19,491
Income Tax Provision    
Income Tax Disclosure [Line Items]    
Pre-tax book income (2,381,360) 3,760,508
Expected tax at 21% (500,086) 789,707
Mark to market (3,937) 6,605
Intangible amortization (89,480) (67,008)
Paycheck protection program loan forgiveness 0 (792,333)
Other 2,404 3,873
Current 16,352 19,491
Deferred (162,688) (15,672)
Federal research and development credits (7,647) 9,551
Deferred tax past year true-up's (46,786)  
Change in valuation allowance 668,326 (15,228)
Capitalized research and development expenses 174,674 0
Other (34,780) (3,495)
Income tax provision $ 16,352 $ 19,491