Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 28, 2025	Dec. 28, 2024
Current assets:
Cash and cash equivalents	$ 2,374,037	$ 3,280,687
Marketable securities, at fair value	1,044,925	1,031,001
Inventories, net	5,198,246	4,331,066
Prepaid expenses and other current assets	263,636	480,986
Total current assets	14,899,576	14,159,016
Property and equipment:
Production equipment	10,659,948	10,382,379
Furniture and office equipment	910,310	891,921
Leasehold improvements	997,830	997,830
Total cost	12,568,088	12,272,130
Accumulated depreciation and amortization	(10,698,945)	(10,377,756)
Construction in progress	78,834	108,874
Net property and equipment	1,947,977	2,003,248
Intangible assets	21,363	0
Right-of-use lease asset	108,000	186,000
Deferred taxes, net	2,392,854	2,528,682
Total Assets	19,369,770	18,876,946
Current liabilities:
Note payable, current portion	0	8,130
Accounts payable	3,286,223	3,053,712
Accrued expenses	1,036,463	913,279
Deferred revenue	30,384	172,429
Lease liability, current portion	108,000	160,000
Total current liabilities	4,461,070	4,307,550
Deferred revenue – long term	31,277	31,277
Long term lease liability	0	26,000
Total liabilities	4,492,347	4,364,827
Stockholders’ equity:
Common stock, $0.01 par value, authorized 20,000,000 shares; issued 14,661,487 shares; outstanding 14,525,960 shares at each June 28, 2025 and December 28, 2024	146,615	146,615
Additional paid-in capital	40,751,927	40,580,387
Accumulated other comprehensive income	9,469	15,500
Accumulated deficit	(25,690,450)	(25,890,245)
Less cost of 135,527 common shares repurchased at each June 28, 2025 and December 28, 2024	(340,138)	(340,138)
Total stockholders’ equity	14,877,423	14,512,119
Total liabilities and stockholders’ equity	19,369,770	18,876,946
Trade Accounts Receivable [Member]
Current assets:
Accounts receivable	5,602,703	4,858,208
Other Receivables [Member]
Current assets:
Accounts receivable	$ 416,029	$ 177,068