Balance Sheets (Unaudited) - USD ($)	Apr. 01, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 7,369,863	$ 8,266,753
Accounts receivable-trade, net	4,714,138	3,777,975
Accounts receivable-other	700,703	685,668
Inventories, net	4,692,655	4,875,901
Prepaid expenses and other current assets	299,601	211,242
Total current assets	17,776,960	17,817,539
Property and equipment:
Production equipment	10,900,344	10,770,427
Furniture and office equipment	952,883	952,883
Leasehold improvements	985,649	985,649
Total cost	12,838,876	12,708,959
Accumulated depreciation and amortization	(11,571,509)	(11,446,901)
Construction in progress	111,612	64,910
Net property and equipment	1,378,979	1,326,968
Right-of-use lease asset (note 4, leases)	433,000	466,000
Deferred taxes, net	1,842,992	2,069,436
Total Assets	21,431,931	21,679,943
Current liabilities:
Note payable, current portion	44,424	43,711
Accounts payable	2,046,893	1,836,865
Accrued expenses	731,454	820,856
Deferred revenue	1,828,068	2,521,128
Current lease liability	157,000	157,000
Total current liabilities	4,807,839	5,379,560
Note payable less current portion	43,439	54,847
Deferred Revenue – Long term	0	231,020
Long-term lease liability	276,000	309,000
Total liabilities	5,127,278	5,974,427
Commitments & Contingencies
Stockholders’ equity:
Common stock, $0.01 par value, authorized 20,000,000 shares; issued 14,467,487 and 14, 460,486 shares; outstanding 14,457,186 and 14, 450,470 shares; at April 1, 2023 and December 31, 2022, respectively	144,675	144,605
Additional paid-in capital	39,867,507	39,726,851
Accumulated deficit	(23,665,891)	(24,125,092)
Less cost of 10,301 and 10,016 common shares repurchased at April 1, 2023 and December 31, 2022, respectively	(41,638)	(40,848)
Total stockholders’ equity	16,304,653	15,705,516
Total liabilities and stockholders’equity	$ 21,431,931	$ 21,679,943