CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Investments (Details) - USD ($)
$ in Thousands

Dec. 31, 2024

Dec. 31, 2023

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

$ 3,500

Short-term Investments [Member]

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Debt Securities, Amortized Cost Basis

392,920

$ 422,532

Available-for-sale Securities, Gross Unrealized Gains

770

304

Available-for-sale Securities, Gross Unrealized Losses

(699)

Available-for-sale Securities, Fair Value Disclosure

393,690

422,137

Long-term Investments [Member]

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Debt Securities, Amortized Cost Basis

434,766

284,053

Available-for-sale Securities, Gross Unrealized Gains

1,302

1,457

Available-for-sale Securities, Gross Unrealized Losses

(595)

(8)

Available-for-sale Securities, Fair Value Disclosure

435,473

285,502

Marketable Securities [Member] | Short-term Investments [Member]

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Debt Securities, Amortized Cost Basis

^[1]

142

Available-for-sale Securities, Gross Unrealized Gains

^[1]

Available-for-sale Securities, Gross Unrealized Losses

^[1]

Available-for-sale Securities, Fair Value Disclosure

^[1]

154

Corporate Bonds [Member] | Short-term Investments [Member]

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Debt Securities, Amortized Cost Basis

1,763

Available-for-sale Securities, Gross Unrealized Gains

Available-for-sale Securities, Gross Unrealized Losses

(5)

Available-for-sale Securities, Fair Value Disclosure

1,759

U.S. Government Bonds [Member] | Short-term Investments [Member]

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Debt Securities, Amortized Cost Basis

392,778

420,769

Available-for-sale Securities, Gross Unrealized Gains

758

303

Available-for-sale Securities, Gross Unrealized Losses

(694)

Available-for-sale Securities, Fair Value Disclosure

393,536

420,378

U.S. Government Bonds [Member] | Long-term Investments [Member]

Schedule Of Available For Sale Securities [Line Items]

Available-for-sale Debt Securities, Amortized Cost Basis

434,766

284,053

Available-for-sale Securities, Gross Unrealized Gains

1,302

1,457

Available-for-sale Securities, Gross Unrealized Losses

(595)

(8)

Available-for-sale Securities, Fair Value Disclosure

$ 435,473

$ 285,502

[1]	Changes in aggregate fair market value recorded in other loss, net on the Consolidated Statements of Income.

UNIVERSAL DISPLAY CORP \PA\ 10-K