CONDENSED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 10,182	$ 9,948
Investments	56	56
Trade receivables, less allowance for credit losses of $28 and $11, respectively	1,282	1,309
Inventories, net	2,010	1,964
Other current assets	180	197
Income tax receivable	72	0
Total current assets	13,782	13,474
Deferred income tax asset, net	501	501
Property and equipment, net	877	910
Total assets	15,160	14,885
Current liabilities
Accounts payable	287	146
Accrued expenses	482	365
Accrued income taxes	0	41
Total current liabilities	769	552
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,449,021 shares issued and outstanding	344	344
Additional paid-in capital	2,423	2,360
Retained earnings	11,624	11,629
Total stockholders' equity	14,391	14,333
Total liabilities and stockholders' equity	$ 15,160	$ 14,885