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FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2024

Carrying Amounts and Estimated Fair Values of Financial Instruments

The following table presents the carrying amounts and estimated fair values of our Company’s financial instruments at December 31, 2024 and 2023.

(in US$ thousands)		2024								2023
		Carrying amount				Fair value				Carrying amount				Fair value
Financial assets
Cash and cash equivalents		$	34,781			$	34,781			$	38,470			$	38,470
Accounts receivable			141				141				227				227
Restricted cash			313				313				313				313
Refundable deposits			182				182				193				193
Investment in securities - noncurrent			5,441				5,441				5,777				5,777
Financial liabilities
Accounts payable			38				38				44				44
Accrued expenses			745				745				1,182				1,182
Lease liabilities - current and noncurrent			500				500				970				970

Summary of Assets and Liabilities Measured at Fair Value

Assets and liabilities measured at fair value on a recurring basis are summarized as below:

(in US$ thousands)		Fair Value Measurement Using
		Level 1				Level 2				Level 3				At December 31, 2024
Assets
Restricted cash - time deposits		$	—			$	313			$	—			$	313
Investment in securities - noncurrent			—				—				5,441				5,441
		$	—			$	313			$	5,441			$	5,754

(in US$ thousands)		Fair Value Measurement Using
		Level 1				Level 2				Level 3				At December 31, 2023
Assets
Restricted cash - time deposits		$	—			$	313			$	—			$	313
Investment in securities - noncurrent			—				—				5,777				5,777
		$	—			$	313			$	5,777			$	6,090

Reconciliation of Beginning and Ending Balances of Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs Level Three

For assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during 2024 and 2023, a reconciliation of the beginning and ending balances are presented as follows:

(in US$ thousands)		2024
		Investment in debt securities				Investment in equity securities
Balance at beginning of year		$	5,548			$	229
Purchase			1,063				—
Disposal or repayment			—				—
Total gains or (losses) (realized/unrealized)
included in earnings			—				(161	)
included in other comprehensive income - unrealized gain (loss) on security			(865	)			—
included in other comprehensive income - foreign currency items			(362	)			(11	)
Balance at end of year		$	5,384			$	57
The amount of total gains or (losses) for the period    included in earnings attributable to the change in    unrealized gains or losses relating to assets still held at    the reporting date.		$	—			$	(161	)

(in US$ thousands)		2023
		Investment in debt securities				Investment in equity securities
Balance at beginning of year		$	7,950			$	2,371
Purchase			105				—
Disposal or repayment			(1,000	)			—
Total gains or (losses) (realized/unrealized)
included in earnings			—				(2,110	)
included in other comprehensive income - unrealized gain (loss) on security			(1,453	)			—
included in other comprehensive income - foreign currency items			(54	)			(32	)
Balance at end of year		$	5,548			$	229
The amount of total gains or (losses) for the period    included in earnings attributable to the change in    unrealized gains or losses relating to assets still held at    the reporting date.		$	—			$	(2,110	)

Level 3

Summary of Significant Unobservable Inputs Used in Fair Value Measurements Categorized Within Level 3 of Fair Value Hierarchy

The significant unobservable inputs used in the fair value measurements categorized within Level 3 of the fair value hierarchy, together with a quantitative sensitivity analysis as of December 31, 2024 and 2023 are shown below: Investment in securities - Level 3 financial assets Sensitivity of the Input to Fair Value
					Changes of Fair Value (in US$ thousands)
Calculation Date	Valuation Technique	Significant Unobservable Inputs	Rate for debt investment	Rate for equity investment	If the Rate of Input changes by -1%	If the Rate of Input changes by +1%
December 31, 2024	The discounted cash flow analysis to estimate the enterprise value, and then the  option pricing method to allocate equity value among various classes of stakeholders.	Discount rate for future cash flows	38.5%	38.5%	Debt securities: +$324 Equity securities: +$28	Debt securities: -$352 Equity securities: -$20
		Discount for lack of marketability	13%	From13.0% to 48.0% for different scenarios	Debt securities: +$62 Equity securities: +$1	Debt securities: -$62 Equity securities: -$1
		Volatility	29%	29%	Debt securities: +$99 Equity securities: -$1	Debt securities: -$36 Equity securities: +$2
December 31, 2023	The discounted cash flow analysis to estimate the enterprise value, and then the option pricing method to allocate equity value among various classes of stakeholders.	Discount rate for future cash flows	38.5%	38.5%	Debt securities: +$90 Equity securities: +$67	Debt securities: -$121 Equity securities: -$58
		Discount for lack of marketability	12%	From 12.0% to 30.0% for different scenarios	Debt securities: +$63 Equity securities: +$4	Debt securities: -$63 Equity securities: -$3
		Volatility	29%	29%	Debt securities: +$22 Equity securities: +$3	Debt securities: -$86 Equity securities: -$2

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Tabular disclosure of financial instrument measured at fair value on recurring or nonrecurring basis. Includes, but is not limited to, instrument classified in shareholders' equity.

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