CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 11,868	$ 11,510
Trade accounts receivable, net of allowance for doubtful accounts of $142 and $147, respectively	4,932	4,992
Inventories	6,976	6,751
Other current assets	684	645
TOTAL CURRENT ASSETS	24,460	23,898
Property, plant and equipment - net	1,000	1,072
Other assets	2,012	2,195
TOTAL ASSETS	27,472	27,165
CURRENT LIABILITIES:
Accounts payable	1,534	1,366
Accrued compensation	1,493	1,670
Deferred revenue	1,733	1,575
Other accrued liabilities	1,544	1,596
Income taxes payable	124	112
TOTAL CURRENT LIABILITIES	6,428	6,319
Operating lease liabilities	1,298	1,500
Long-term other payables	221	237
COMMITMENTS	0	0
STOCKHOLDERS' EQUITY
Preferred stock - Authorized, 5,000,000 shares, including 200,000 shares of Series A Junior Participating Issued and outstanding, none	0	0
Common stock, at stated value - Authorized, 30,000,000 shares Issued and outstanding, 8,818,076 shares as of March 31, 2023 and 8,816,381 shares as of December 31, 2022	22,153	21,897
Accumulated earnings (deficit)	(3,036)	(3,131)
Accumulated other comprehensive income	408	343
TOTAL STOCKHOLDERS' EQUITY	19,525	19,109
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 27,472	$ 27,165