Accrued expense (Notes)

12 Months Ended

Jun. 30, 2023

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

	June 30,
	2023		2022
Accrued compensation	$	470,896	$	445,651
Warranty reserve	32,078		32,078
Tax payable	101,103		100,380
Other accruals	47,901		323,887
Total accrued expenses	$	651,978	$	901,996

Accrued compensation as of June 30, 2023 and 2022 primarily relates to payroll, vacation accruals, and sales tax payable.

Schedule of Accrued Liabilities [Table Text Block]

	June 30,
	2023		2022
Accrued compensation	$	470,896	$	445,651
Warranty reserve	32,078		32,078
Tax payable	101,103		100,380
Other accruals	47,901		323,887
Total accrued expenses	$	651,978	$	901,996