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PENSION BENEFITS (Tables)

12 Months Ended

Dec. 31, 2020

Compensation And Retirement Disclosure [Abstract]

Benefit Obligations, Fair Value of Plan Assets, and Funded Status

The following table sets forth the plan’s benefit obligations, fair value of plan assets, and funded status at December 31, 2019 and 2020:

		December 31
(in US$ thousands)		2019				2020
Benefit Obligation		$	326			$	385
Fair value of plan assets			411				452
		$	(85	)		$	(67	)
Amounts recognized in the balance sheet consist of:
Noncurrent liabilities (assets)		$	(85	)		$	(67	)
Accumulated other comprehensive income			—				—
Net amount recognized		$	(85	)		$	(67	)
Amounts recognized in accumulated comprehensive income    (loss) consist of:
Unrecognized net gain (loss)		$	(66	)		$	(94	)

Pension Cost

For the years ended December 31, 2018, 2019 and 2020, the net period pension cost consisted of the following:

		December 31
(in US$ thousands)		2018				2019				2020
Service cost		$	—			$	—			$	—
Interest cost			5				4				4
Expected return on plan assets			(6	)			(5	)			(5	)
Amortization of net loss			2				3				2
Curtailment gain			—				—				—
		$	1			$	2			$	1

Weighted Average Assumptions Used to Determine Benefit Obligations

Weighted average assumptions used to determine benefit obligations for 2019 and 2020 were as follows:

		December 31
		2019				2020
Discount rate			1.125	%			0.750	%
Rate of compensation increase			2.00	%			2.00	%

Schedule of Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost

Weighted average assumptions used to determine net periodic benefit cost for end of fiscal year were as follows:

		2019				2020
Discount rate			1.375	%			1.125	%
Rate of return on plan assets			1.375	%			1.125	%
Rate of compensation increase			2.00	%			2.00	%

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Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate.

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Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

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Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

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