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Schedule of revenue recognition - sales revenue by product line (Details) - USD ($)	3 Months Ended
	May 31, 2025	May 31, 2024
Disaggregation of Revenue [Line Items]
Sales revenue	$ 5,132,773	$ 5,031,038
Fluxing Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 152,000	$ 134,000
Sales revenue, percent	3.00%	2.00%
Integrated Coating Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 3,054,000	$ 747,000
Sales revenue, percent	59.00%	15.00%
Multi-Axis Coating Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 677,000	$ 2,664,000
Sales revenue, percent	13.00%	53.00%
OEM Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 130,000	$ 332,000
Sales revenue, percent	3.00%	7.00%
Spare Parts, Services and Other [Menber]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 1,120,000	$ 1,154,000
Sales revenue, percent	22.00%	23.00%
Total [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 5,133,000	$ 5,031,000

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