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Inventories (Tables)
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of inventories
(In thousands)   December 31,
2021  
    December 31,
2022  
 
Raw materials     4,395       1,971  
Finished goods     2,390       2,401  
Less: write-down of obsolete inventories     (652 )     (748 )
Total inventories     6,133       3,624