Condensed Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS
Cash and cash equivalents	$ 5,218,940	$ 4,786,923
Accounts receivable, net	1,768,967	1,868,488
Inventory, net	1,723,989	1,560,175
Prepaid expenses	453,912	417,254
Net investment in sales type leases - current	63,487	59,173
Income tax receivable	0	124,198
TOTAL CURRENT ASSETS	9,229,295	8,816,211
LONG-TERM ASSETS
Accounts receivable - long-term	1,094,869	1,523,793
Net investment in sales type leases - long term	161,089	176,444
Operating lease right-of-use assets	143,294	157,802
TOTAL LONG-TERM ASSETS	1,399,252	1,858,039
TOTAL ASSETS	10,628,547	10,674,250
CURRENT LIABILITIES
Accounts payable and accrued expenses	429,438	417,853
Payroll liabilities	51,052	10,665
Customer deposits	1,077,698	1,485,622
Current portion of operating lease liabilities	56,197	55,942
Income tax payable	8,202	0
TOTAL CURRENT LIABILITIES	1,622,587	1,970,082
LONG-TERM LIABILITIES
Operating lease liabilities	81,183	97,476
Deferred tax liability	288,000	331,000
TOTAL LIABILITIES	1,991,770	2,398,558
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value; 25,000,000 shares authorized: 4,756,734 and 4,756,734 shares issued; and 4,631,988 and 4,621,988 shares outstanding at March 31, 2023 and December 31, 2022, respectively.	4,632	4,622
Additional paid-in capital	2,224,702	2,207,030
Retained earnings	6,633,500	6,297,639
Stockholders' Equity before Treasury Stock	8,862,834	8,509,291
Treasury stock, 124,746 and 134,746 shares (at cost) at March 31, 2023 and December 31, 2022, respectively.	(226,057)	(233,599)
TOTAL STOCKHOLDERS’ EQUITY	8,636,777	8,275,692
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 10,628,547	$ 10,674,250