Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023	Feb. 29, 2024
Deferred Tax Liabilities, Investments	$ 119,000		$ 119,000		$ 86,000
Accounts Receivable, after Allowance for Credit Loss, Current	1,793,000		1,793,000		2,826,000
Accounts Receivable, Allowance for Credit Loss	0		0		0
Accounts Receivable, Allowance for Credit Loss, Writeoff			0	$ 0
Cash, Uninsured Amount	$ 677,000		$ 677,000		$ 1,007,000
Common Stock Equivalents, Outstanding (in shares)	0	0	0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)	0	0	0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	0	0
ES Components [Member]
Revenues	$ 0	$ 0	$ 0	$ 0
Die from ES Components [Member]
Related Party Transaction, Purchases from Related Party	0	24,000	90,000	57,000
Used Equipment Purchased From ES Components [Member]
Related Party Transaction, Purchases from Related Party	$ 0	$ 0	$ 0	$ 0