CONDENSED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 9,888	$ 9,870
Investments	56	56
Trade receivables, less allowance for credit losses of $11 and $11, respectively	1,180	1,283
Inventories	1,865	1,751
Other current assets	177	179
Income tax receivable	41	0
Total current assets	13,207	13,139
Deferred income tax asset, net	330	355
Property and equipment, net	930	951
Total assets	14,467	14,445
Current liabilities
Accounts payable	199	291
Accrued expenses	439	323
Accrued income taxes	0	76
Total current liabilities	638	690
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,428,021 shares issued and outstanding	342	342
Additional paid-in capital	2,297	2,230
Retained earnings	11,190	11,183
Total stockholders' equity	13,829	13,755
Total liabilities and stockholders' equity	$ 14,467	$ 14,445