CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 98,980	$ 91,985
Short-term investments	393,690	422,137
Accounts receivable	113,648	139,850
Inventory	182,938	175,795
Other current assets	110,575	87,365
Total current assets	899,831	917,132
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $169,877 and $143,908	195,239	175,150
ACQUIRED TECHNOLOGY, net of accumulated amortization of $203,621 and $186,850	73,554	90,325
OTHER INTANGIBLE ASSETS, net of accumulated amortization of $11,842 and $10,414	5,446	6,874
GOODWILL	15,535	15,535
INVESTMENTS	457,593	299,548
DEFERRED INCOME TAXES	78,320	59,108
OTHER ASSETS	106,815	105,289
TOTAL ASSETS	1,832,333	1,668,961
CURRENT LIABILITIES:
Accounts payable	36,590	10,933
Accrued expenses	46,026	52,080
Deferred revenue	33,074	47,713
Other current liabilities	9,720	8,096
Total current liabilities	125,410	118,822
DEFERRED REVENUE	537	12,006
RETIREMENT PLAN BENEFIT LIABILITY	54,450	52,249
OTHER LIABILITIES	35,411	38,658
Total liabilities	215,808	221,735
COMMITMENTS AND CONTINGENCIES (Note 18)
SHAREHOLDERS' EQUITY:
Preferred Stock, par value $0.01 per share, 5,000,000 shares authorized, 200,000 shares of Series A Nonconvertible Preferred Stock issued and outstanding (liquidation value of $7.50 per share or $1,500)	2	2
Common Stock, par value $0.01 per share, 200,000,000 shares authorized, 48,834,541and 48,731,026 shares issued, and 47,468,893 and 47,365,378 share outstanding at December 31, 2024 and December 31, 2023, respectively	488	487
Additional paid-in capital	723,719	699,554
Retained earnings	934,655	789,553
Accumulated other comprehensive loss	(1,055)	(1,086)
Treasury stock, at cost (1,365,648 shares at December 31, 2024 and December 31, 2023)	(41,284)	(41,284)
Total shareholders’ equity	1,616,525	1,447,226
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,832,333	$ 1,668,961