CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
CONSOLIDATED BALANCE SHEETS
Allowance for credit losses of trade accounts receivable	$ 29	$ 22
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	9,390,730	9,236,040
Common stock, shares outstanding	9,390,730	9,236,040
Series A Junior Participating
CONSOLIDATED BALANCE SHEETS
Preferred stock, shares authorized	200,000	200,000