Concentration of credit risk (Details) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Jun. 30, 2025
Concentration Risk [Line Items]
Concentration Risk, Supplier			two			one
Net (loss) income	$ 97,677	$ (239,852)	$ 246,021	$ (32,217)	$ (142,175)	$ 213,804
Accumulated Deficit [Member]
Concentration Risk [Line Items]
Net (loss) income	97,677	$ (239,852)	246,021	$ (32,217)
Customer Concentration Risk [Member] | Customer One [Member]
Concentration Risk [Line Items]
Concentration Risk, Customer					No	One
Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 3,591,000		$ 3,221,000		$ 6,267,000	$ 6,002,000
Accounts Receivable
Concentration Risk [Line Items]
Concentration Risk, Customer					one	one
Accounts Receivable | Customer Concentration Risk [Member] | Customer One [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage					23.00%		21.00%
Revenue Benchmark | Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Supplier	one				two
Revenue Benchmark | Customer Concentration Risk [Member] | Customer One [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%		16.00%		13.00%	17.00%
Revenue Benchmark | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	100.00%		100.00%		100.00%	100.00%
Accounts Payable | Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Supplier					one		two
Domestic [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 1,727,000		$ 1,699,000		$ 3,360,000	$ 3,445,000
Domestic [Member] | Revenue Benchmark | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	48.10%		52.70%		53.60%	57.40%
International [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 1,864,000		$ 1,522,000		$ 2,907,000	$ 2,557,000
International [Member] | Revenue Benchmark | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	51.90%		47.30%		46.40%	42.60%
Supplier one [Member] | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage					40.00%		30.00%
Supplier one [Member] | Revenue Benchmark | Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	51.00%		48.00%		40.00%	43.00%
Supplier two | Accounts Payable Benchmark [Member] | Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage							28.00%
Supplier two | Revenue Benchmark | Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage			12.00%		14.00%