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Revenue Recognition - Sales Revenue by Product Line (Details) - USD ($)	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Sales revenue	$ 14,832,877	$ 15,354,619
Fluxing Systems
Sales revenue	$ 798,000	$ 906,000
Sales revenue, percent	5.00%	6.00%
Integrated Coating Systems
Sales revenue	$ 4,219,000	$ 3,599,000
Sales revenue, percent	28.00%	23.00%
Multi-Axis Coating Systems
Sales revenue	$ 5,614,000	$ 6,866,000
Sales revenue, percent	38.00%	45.00%
OEM Systems
Sales revenue	$ 1,582,000	$ 1,384,000
Sales revenue, percent	11.00%	90.00%
Other
Sales revenue	$ 2,620,000	$ 2,600,000
Sales revenue, percent	18.00%	17.00%

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- Definition

Percent of Sales Revenue

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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