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Schedule of revenue recognition - sales revenue by product line (Details) - USD ($)	3 Months Ended		6 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Disaggregation of Revenue [Line Items]
Sales revenue	$ 5,162,696	$ 5,161,782	$ 10,295,469	$ 10,192,820
Fluxing Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 165,000	$ 119,000	$ 317,000	$ 253,000
Sales revenue, percent	3.00%	2.00%	3.00%	3.00%
In-Line Coating Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 1,530,000	$ 2,023,000	$ 4,584,000	$ 2,770,000
Sales revenue, percent	30.00%	39.00%	45.00%	27.00%
Multi-Axis Coating Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 2,030,000	$ 1,931,000	$ 2,707,000	$ 4,595,000
Sales revenue, percent	39.00%	37.00%	26.00%	45.00%
OEM Systems [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 394,000	$ 205,000	$ 524,000	$ 537,000
Sales revenue, percent	8.00%	4.00%	5.00%	5.00%
Spare Parts, Services and Other [Menber]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 1,044,000	$ 884,000	$ 2,164,000	$ 2,038,000
Sales revenue, percent	20.00%	17.00%	21.00%	20.00%
Total [Member]
Disaggregation of Revenue [Line Items]
Sales revenue	$ 5,163,000	$ 5,162,000	$ 10,296,000	$ 10,193,000

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