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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Feb. 28, 2022
Feb. 28, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income $ 2,542,573 $ 1,120,642
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 435,525 463,076
Stock based compensation expense 179,283 47,633
Inventory reserve 43,381 91,000
Paycheck Protection Program Loan Forgiveness (1,005,372)
Deferred tax expense (17,620) (129,723)
(Increase) Decrease in:    
Accounts receivable 665,297 (828,100)
Inventories 194,483 (305,790)
Prepaid expenses and other assets (171,988) 2,382
(Decrease) Increase in:    
Accounts payable and accrued expenses (553,129) 763,269
Customer deposits 1,427 (482,149)
Income taxes payable 5,307 (17,054)
Net Cash Provided by Operating Activities 2,319,167 725,186
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of equipment, furnishings and leasehold improvements (326,942) (344,353)
Patent costs paid (6,000)
Capital expenditure grant proceeds 100,000
Purchase of marketable securities, net (1,304,520) (344,230)
Net Cash Used In Investing Activities (1,631,462) (594,583)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from exercise of stock options 68,775
Proceeds from note payable - bank 1,001,640
Repayment of long-term debt (707,716)
Net Cash Provided By Financing Activities 68,775 293,924
NET INCREASE IN CASH AND CASH EQUIVALENTS 756,480 424,527
CASH AND CASH EQUIVALENTS:    
Beginning of year 4,084,078 3,659,551
End of year 4,840,558 4,084,078
Supplemental Cash Flow Disclosure:    
Interest Paid 39,843
Income Taxes Paid $ 373,928 $ 374,004