Condensed Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
OPERATING ACTIVITIES
Net income	$ 971,489	$ 782,239
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,889	9,675
Deferred income taxes	187,000	153,000
Provision of credit losses	16,775	(3,671)
Stock compensation expense	15,269	19,477
Accrued interest on short-term investments	0	(40,556)
Noncash operating lease expense, net	1,506	4,020
Changes in operating assets and liabilities:
Accounts receivable	(780,464)	(301,941)
Inventory	300,083	323,390
Prepaid expenses	(339,592)	64,665
Net investment in sales type leases	18,138	17,767
Accounts payable, accrued expenses	(150,991)	(20,677)
Customer deposits	99,488	(403,148)
Income tax receivable and payable	90,500	130,570
Net cash provided by operating activities	444,090	734,810
INVESTING ACTIVITIES
Proceeds from short-term investments	0	2,570,085
Net cash provided by investing activities	0	2,570,085
FINANCING ACTIVITIES
Payment of dividends	(557,010)	(92,789)
Net cash used in financing activities	(557,010)	(92,789)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(112,920)	3,212,106
CASH AND CASH EQUIVALENTS
Beginning of period	8,235,788	2,257,696
End of period	8,122,868	5,469,802
Supplemental cash flow information:
Cash paid for income taxes	8,500	0
Common Stock Issued out of Treasury Stock [Member]
Non-cash investing and financing activities:
Common stock issued out of treasury stock for settlement of accrued liabilities	$ 5,061	$ 13,960