CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 10,631	$ 12,321
Accounts receivable, net of allowance for expected credit losses of $668 and $768	7,780	9,824
Inventories	19,171	17,759
Prepaid income taxes	352	322
Other current assets	931	773
Total current assets	38,865	40,999
Fixed assets, net of accumulated depreciation of $18,947 and $18,646	2,187	2,421
Right-of-use assets	1,371	1,602
Goodwill	2,621	2,621
Deferred tax assets	6,691	6,304
Intangible assets, net of accumulated amortization of $1,556 and $1,518	50	88
Other assets	133	163
Total noncurrent assets	13,053	13,199
Total assets	51,918	54,198
Current liabilities:
Revolving loan payable	2,250	2,250
Accounts payable	4,226	4,431
Accrued liabilities	4,126	4,947
Lease liabilities	941	929
Deferred revenue	925	1,079
Total current liabilities	12,468	13,636
Deferred revenue, net of current portion	196	209
Lease liabilities, net of current portion	468	720
Other liabilities	215	219
Total noncurrent liabilities	879	1,148
Total liabilities	13,347	14,784
Commitments and contingencies (see Notes 5 and 7)
Shareholders' equity:
Common stock, $0.01 par value, 20,000,000 shares authorized; 14,039,749 and 14,003,653 shares issued, respectively; 9,994,907 and 9,958,811 shares outstanding, respectively	140	140
Additional paid-in capital	57,249	57,055
Retained earnings	13,342	14,378
Accumulated other comprehensive loss, net of tax	(50)	(49)
Treasury stock, at cost (4,044,842 shares)	(32,110)	(32,110)
Total shareholders' equity	38,571	39,414
Total liabilities and shareholders' equity	$ 51,918	$ 54,198