CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 132,654	$ 138,610
Accounts receivable, net	28,270	28,402
Inventories, net	32,633	30,535
Other receivables	5,229	4,444
Prepaid expenses	10,591	10,379
Hedge collateral (Note 8)	2,080	2,080
Other current assets (Note 18)	4,017	4,779
Total current assets	215,474	219,229
Property, plant and equipment, net	80,289	81,463
Operating lease right-of-use assets	3,602	3,107
Intangible assets, net	500	507
Long-term prepaid expenses, net	177	165
Deferred income taxes	53,435	52,889
Other non-current assets	20,390	21,956
Total assets	373,867	379,316
Current liabilities
Accounts payable	24,483	21,642
Other accounts payable	10,522	10,764
Accrued expenses (Note 7)	8,796	8,648
Accrued income taxes	52	56
Operating lease liabilities	1,693	1,393
Other current liabilities	2,241	3,765
Total current liabilities	47,787	46,268
Long-term borrowing	27,276	27,211
Accrued severance benefits, net	18,041	17,094
Non-current operating lease liabilities	1,881	1,823
Other non-current liabilities	9,681	10,123
Total liabilities	104,666	102,519
Stockholders' equity
Common stock, $0.01 par value, 150,000,000 shares authorized, 57,571,469 shares issued and 36,675,789 outstanding at March 31, 2025 and 57,498,507 shares issued and 36,912,118 outstanding at December 31, 2024	575	574
Additional paid-in capital	280,452	279,423
Retained earnings	235,698	244,576
Treasury stock, 20,895,680 shares at March 31, 2025 and 20,586,389 shares at December 31, 2024, respectively	(227,047)	(225,883)
Accumulated other comprehensive loss	(20,477)	(21,893)
Total stockholders' equity	269,201	276,797
Total liabilities and stockholders' equity	$ 373,867	$ 379,316