Accrued expense (Notes)

12 Months Ended

Jun. 30, 2021

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

	June 30,
	2021		2020
Accrued compensation	$	464,213	$	417,829
Line of credit and notes payable interest accrual	11,506		1,224
Customer deposits	64,494		14,320
Warranty reserve	32,078		32,078
Tax payable	100,834		100,176
Other accruals	22,428		115,420
Total accrued expenses	$	695,553	$	681,047

Accrued compensation as of June 30, 2021 and 2020 primarily relates to payroll, vacation accruals, and payroll tax liabilities.

Schedule of Accrued Liabilities [Table Text Block]

	June 30,
	2021		2020
Accrued compensation	$	464,213	$	417,829
Line of credit and notes payable interest accrual	11,506		1,224
Customer deposits	64,494		14,320
Warranty reserve	32,078		32,078
Tax payable	100,834		100,176
Other accruals	22,428		115,420
Total accrued expenses	$	695,553	$	681,047