Intangible assets (Tables)

12 Months Ended

Sep. 30, 2023

Intangible assets

Summary of intangible assets other than goodwill

	As of September 30, 2023
	Gross Carrying		Accumulated		Accumulated		Net Carrying
	Value		Impairment		Amortization		Value
License agreement acquired from the Transaction (a)	$	5,700,000	$	—	$	—	$	5,700,000
Customer relationships acquired from the Transaction (a)		10,740,000		—		(268,500)		10,471,500
Licensing and certification rights (b)		696,506		(44,400)		(638,285)		13,821
Total	$	17,136,506	$	(44,400)	$	(906,785)	$	16,185,321
	As of September 30, 2022
	Gross Carrying		Accumulated		Accumulated		Net Carrying
	Value		Impairment		Amortization		Value
Licensing and certification rights (b)	$	696,506	$	—	$	(636,158)	$	60,348
Total	$	696,506	$	—	$	(636,158)	$	60,348

(a) As part of the Transaction, the Company acquired intangible assets related to the license agreement for the license rights to use certain Honeywell intellectual property and customer relationships. The license agreement has an indefinite life and is not subject to amortization; the customer relationships have an estimated weighted average life of ten years. The Company determined that the intangible assets were not impaired as of September 30, 2023 and, as such, no impairment charges have been recorded for the year ended September 30, 2023.

(b) The licensing and certification rights are amortized over a defined number of units. An impairment charge of $44,400 was recorded during the year ended September 30, 2023. No impairment charges were recorded during the years ended September 30, 2022 or 2021.

Summary of expected future amortization expense related to the customer relationships

2024	$	1,074,000
2025		1,074,000
2026		1,074,000
2027		1,074,000
2028		1,074,000
Thereafter		5,101,500
Total	$	10,471,500