Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 9,948	$ 9,870
Equity securities	56	56
Trade receivables, less allowance for credit losses of $11 and $11, respectively	1,309	1,283
Inventories, net	1,964	1,751
Other current assets	197	179
Total current assets	13,474	13,139
Deferred income tax asset	501	355
Property and equipment, net	910	951
Total assets	14,885	14,445
Current liabilities
Accounts payable	146	291
Accrued expenses	365	323
Accrued income taxes	41	76
Total current liabilities	552	690
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,449,021 and 3,428,021 shares issued and outstanding, respectively	344	342
Additional paid-in capital	2,360	2,230
Retained earnings	11,629	11,183
Total stockholders' equity	14,333	13,755
Total liabilities and stockholders' equity	$ 14,885	$ 14,445