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Term loans (Details) - USD ($)
Jun. 26, 2021
Jun. 26, 2020
Jun. 23, 2020
Apr. 20, 2020
Jun. 30, 2020
Paycheck Protection Program Loan          
Loan proceeds       $ 1,058,700  
Current portion of notes payable         $ 494,926
Long-term portion of notes payable         $ 563,774
Economic Injury Disaster Loan          
Loan proceeds   $ 150,000      
Monthly installment amounts due $ 731        
Grant proceeds     $ 10,000