Accrued expense (Notes)

12 Months Ended

Jun. 30, 2022

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

	June 30,
	2022		2021
Accrued compensation	$	445,651	$	464,213
Line of credit and notes payable interest accrual	—		11,506
Customer deposits	212,555		64,494
Warranty reserve	32,078		32,078
Tax payable	100,380		100,834
Other accruals	111,332		22,428
Total accrued expenses	$	901,996	$	695,553

Accrued compensation as of June 30, 2022 and 2021 primarily relates to payroll, vacation accruals, and payroll tax liabilities.

Schedule of Accrued Liabilities [Table Text Block]

	June 30,
	2022		2021
Accrued compensation	$	445,651	$	464,213
Line of credit and notes payable interest accrual	—		11,506
Customer deposits	212,555		64,494
Warranty reserve	32,078		32,078
Tax payable	100,380		100,834
Other accruals	111,332		22,428
Total accrued expenses	$	901,996	$	695,553