Balance Sheets (Unaudited) - USD ($)	Jul. 01, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 8,681,225	$ 8,266,753
Accounts receivable-trade, net	5,074,559	3,777,975
Accounts receivable-other	74,639	685,668
Inventories, net	4,813,753	4,875,901
Prepaid expenses and other current assets	288,315	211,242
Total current assets	18,932,491	17,817,539
Property and equipment:
Production equipment	11,028,500	10,770,427
Furniture and office equipment	952,883	952,883
Leasehold improvements	985,649	985,649
Total cost	12,967,032	12,708,959
Accumulated depreciation and amortization	(11,699,870)	(11,446,901)
Construction in progress	240,415	64,910
Net property and equipment	1,507,578	1,326,968
Right-of-use lease asset	400,000	466,000
Deferred taxes, net	1,664,032	2,069,436
Total assets	22,504,101	21,679,943
LIABILITIES AND STOCKHOLDERS` EQUITY
Common stock, $0.01 par value, authorized 20,000,000 shares; issued 14,546,487 and 14,460,486 shares; outstanding 14,511,544 and 14,450,470 shares; at July 1, 2023 and December 31, 2022, respectively	145,465	144,605
Additional paid-in capital	39,978,453	39,726,851
Accumulated deficit	(23,065,388)	(24,125,092)
Less cost of 34,943 and 10,016 common shares repurchased at July 1, 2023 and December 31, 2022, respectively	(111,938)	(40,848)
Total stockholders` equity	16,946,592	15,705,516
Total liabilities and stockholders` equity	22,504,101	21,679,943
Current liabilities:
Note payable, current portion	56,681	43,711
Accounts payable	2,359,532	1,836,865
Accrued expenses	861,514	820,856
Deferred revenue	1,828,068	2,521,128
Current lease liability	158,000	157,000
Total current liabilities	5,263,795	5,379,560
Note payable less current portion	20,437	54,847
Deferred revenue – long term	31,277	231,020
Long-term lease liability	242,000	309,000
Total liabilities	5,557,509	5,974,427
Commitments and contingencies (note 4)