CONDENSED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 10,756	$ 10,545
Investments	56	56
Trade receivables, less allowance for credit losses of $11 and $11, respectively	1,393	1,404
Inventories, net	2,080	2,028
Other current assets	315	248
Income tax receivable	72	72
Total current assets	14,672	14,353
Deferred income tax asset, net	495	464
Property and equipment	892	885
Total assets	16,059	15,702
Current liabilities
Accounts payable	274	254
Accrued expenses	887	631
Total current liabilities	1,161	885
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,532,423 and 3,482,423 shares issued and outstanding, respectively	353	348
Additional paid-in capital	2,726	2,534
Retained earnings	11,819	11,935
Total stockholders' equity	14,898	14,817
Total liabilities and stockholders' equity	$ 16,059	$ 15,702