XML 171 R77.htm IDEA: XBRL DOCUMENT v3.20.1

Financial risk management and fair values of financial instruments (Tables)

12 Months Ended

Dec. 31, 2019

Text block [abstract]

Summary of Financial Instruments by Category

(a) Financial instruments by category

		December 31, 2018				December 31, 2019
		NT$000				NT$000
Financial assets
Financial assets at fair value through profit or loss
Financial assets mandatorily measured at fair value through profit or loss			11,471				11,038
Financial assets at fair value through other comprehensive income
Designation of equity instruments			174,357				121,808
Financial assets at amortized cost
Cash and cash equivalents			4,642,522				4,704,084
Financial assets at amortized cost			268,271				237,420
Accounts and notes receivable			4,747,288				4,453,669
Accounts receivable – related parties			140				1,045
Other receivables			63,037				89,676
Other receivables – related parties			3,131				2,948
Refundable deposits			22,006				21,145
			9,932,223				9,642,833
Financial liabilities
Financial liabilities at amortized cost
Accounts payable			637,271				819,548
Accounts payable – related parties			347				—
Payables to contractors and equipment suppliers			1,516,735				972,770
Other payables			1,678,482				2,004,266
Other payables – related parties			218				—
Long-term bank loans (including current portion)			9,789,518				9,041,645
Guarantee deposits			1,092				1,095
			13,623,663				12,839,324
Lease liabilities (including current portion)			—				692,951

Information on Assets and Liabilities Denominated in Foreign Currencies whose Values would be Materially Affected by Exchange Rate Fluctuations

The information on assets and liabilities denominated in foreign currencies whose values would be materially affected by the exchange rate fluctuations is as follows:

		December 31, 2018
		Foreign currency				Exchange rate				Carrying amount (NT$000)
(Foreign currency: functional currency)
Financial assets
Monetary items
US$000			170,270				30.7150				5,229,843
JPY000			177,557				0.2782				49,396
RMB000			8,850				4.4720				39,577
Financial liabilities
Monetary items
US$000			18,230				30.7150				559,934
JPY000			2,436,140				0.2782				677,734

		December 31, 2019
		Foreign currency				Exchange rate				Carrying amount (NT$000)
(Foreign currency: functional currency)
Financial assets
Monetary items
US$000			188,369				29.9800				5,647,303
JPY000			266,819				0.2760				73,642
RMB000			6,197				4.3050				26,678
Financial liabilities
Monetary items
US$000			7,867				29.9800				235,853
JPY000			1,033,394				0.2760				285,217

Details of Exposure to Currency Risk Arising from Recognized Monetary Assets or Liabilities Denominated in a Currency Other Than Functional Currency

Analysis of foreign currency market risk arising from significant foreign exchange variations:

		2018
		Change in exchange rate				Effect on profit (NT$000)				Effect on other comprehensive income (NT$000)
Financial assets
Monetary items
US$000			5	%			261,492				—
JPY000			5	%			2,470				—
RMB000			5	%			1,979				—
Financial liabilities
Monetary items
US$000			5	%			27,997				—
JPY000			5	%			33,887				—

		2019
		Change in exchange rate				Effect on profit (NT$000)				Effect on other comprehensive income (NT$000)
Financial assets
Monetary items
US$000			5	%			282,365				—
JPY000			5	%			3,682				—
RMB000			5	%			1,334				—
Financial liabilities
Monetary items
US$000			5	%			11,793				—
JPY000			5	%			14,261				—

Summary of Loss Rate Methodology

As of December 31, 2018 and 2019 the loss rate methodologies are as follows:

		December 31, 2018
		Contract assets				Accounts and notes receivable (including related parties)				Other receivables (including related parties)
		NT$000				NT$000				NT$000
Expected loss rate			0.045	%			0.045	%			0.045	%
Total carrying amount			299,970				4,749,569				66,181
Loss allowance			(135	)			(2,141	)			(13	)

		December 31, 2019
		Contract assets				Accounts and notes receivable (including related parties)				Other receivables (including related parties)
		NT$000				NT$000				NT$000
Expected loss rate			0.030	%			0.030	%			0.030	%
Total carrying amount			377,983				4,456,065				92,642
Loss allowance			(114	)			(1,351	)			(18	)

Summary of Movements in Relation to Loss Allowance for Contract Assets, Accounts Receivable and Other Receivables

7. Under the simplified approach, movements in relation to loss allowance for contract assets, accounts receivable, and other receivables are as follows:

		2018
		Contract assets				Accounts and notes receivable (including related parties)				Other receivables (including related parties)
		NT$000				NT$000				NT$000
January 1_ IAS 39			—				—				—
Adjustments for applying new standards			(115	)			(1,819	)			(7	)
January 1_IFRS 9 (Note)			(115	)			(1,819	)			(7	)
Provision for impairment loss			(20	)			(322	)			(7	)
Reversal of impairment loss			—				—				1
December 31			(135	)			(2,141	)			(13	)

Note: The Group initially applied IFRS 9 on January 1, 2018, and recorded loss allowance based on expected credit loss.

		2019
		Contract assets				Accounts and notes receivable (including related parties)				Other receivables (including related parties)
		NT$000				NT$000				NT$000
January 1			(135	)			(2,141	)			(13	)
Provision for impairment loss			—				—				(5	)
Reversal of impairment loss			21				790				—
December 31			(114	)			(1,351	)			(18	)

Summary Of Investments Financial Assets At Amortized cost

For investments in debt instruments at amortized cost, the credit rating levels are as follows:

December 31, 2018

By lifetime

12 months

Increase in credit risk

Impairment of credit

Total

NT$000

NT$000

NT$000

NT$000

Financial assets at amortized cost

Bank deposits (Note)

268,271

—

—

268,271

December 31, 2019

By lifetime

12 months

Increase in credit risk

Impairment of credit

Total

NT$000

NT$000

NT$000

NT$000

Financial assets at amortized cost

Bank deposits (Note)

237,420

—

—

237,420

Note: Time deposits with contract period over three months and restricted bank deposits.

Maturity Profile of Non-derivative Financial Liabilities Based on Contracted Undiscounted Payments

		December 31, 2018
		Within 1 year				1 to 3 years				3 to 5 years				Over 5 years				Total
		NT$000				NT$000				NT$000				NT$000				NT$000
Non-derivative financial liabilities
Long-term bank loans			927,243				1,814,344				7,734,983				—				10,476,570
Lease obligations payable			18,000				—				—				—				18,000
Guarantee deposits			—				—				—				1,092				1,092
			945,243				1,814,344				7,734,983				1,092				10,495,662

		December 31, 2019
		Within 1 year				1 to 3 years				3 to 5 years				Over 5 years				Total
		NT$000				NT$000				NT$000				NT$000				NT$000
Non-derivative financial liabilities
Long-term bank loans			914,159				1,786,842				6,848,327				—				9,549,328
Lease liabilities			36,806				60,111				57,836				762,699				917,452
Guarantee deposits			—				—				—				1,095				1,095
			950,965				1,846,953				6,906,163				763,794				10,467,875

Summary of Natures of Assets and Liabilities

i) The related information of natures of the assets and liabilities is as follows:

		December 31, 2018
		Level 1				Level 2				Level 3				Total
		NT$000				NT$000				NT$000				NT$000
Assets
Recurring fair value measurements
Financial assets at fair value through profit or loss
- Foreign partnership interests			—				—				11,471				11,471
Financial assets at fair value through other comprehensive income
- Foreign unlisted stocks			—				—				174,357				174,357
			—				—				185,828				185,828

		December 31, 2019
		Level 1				Level 2				Level 3				Total
		NT$000				NT$000				NT$000				NT$000
Assets
Recurring fair value measurements
Financial assets at fair value through profit or loss
- Foreign partnership interests			—				—				11,038				11,038
Financial assets at fair value through other comprehensive income
- Foreign unlisted stocks			—				—				121,808				121,808
			—				—				132,846				132,846

Summary of Movements of Level 3

(d) The following table shows the movements of Level 3 for the years ended December 31, 2018 and 2019:

		December 31, 2018
		Debt instruments				Equity instruments				Total
		NT$000				NT$000				NT$000
January 1			—				—				—
Effects on initial application of IFRS 9			11,433				89,335				100,768
Gains or losses recognized in profit or loss
Recorded as non-operating income			38				—				38
Gains or losses recognized in other comprehensive income
Recorded as unrealized gains on valuation of financial assets at fair value through other comprehensive income			—				85,022				85,022
December 31			11,471				174,357				185,828

		December 31, 2019
		Debt instruments				Equity instruments				Total
		NT$000				NT$000				NT$000
January 1			11,471				174,357				185,828
Gains or losses recognized in profit or loss
Recorded as non-operating expenses			(433	)			—				(433	)
Gains or losses recognized in other comprehensive income
Recorded as unrealized losses on valuation of financial assets at fair value through other comprehensive income			—				(52,549	)			(52,549	)
December 31			11,038				121,808				132,846

Summary of Qualitative Information and Sensitivity Analysis of Changes in Significant Unobservable Inputs Under Valuation Model Used in Level 3 Fair Value Measurement

(f) The following is the qualitative information and sensitivity analysis of changes in significant unobservable inputs under valuation model used in Level 3 fair value measurement:

Fair value as of December 31, 2018

Valuation technique

Significant unobservable input

Range (weighted average method)

Relationship of inputs to fair value

NT$000

Non-derivative debt instrument:

Foreign partnership interests

11,471

Discounted cash flow

Discount rate

0.35

%

The lower the discount rate, the higher the fair value

Non-derivative equity instrument:

Foreign unlisted stocks

174,357

Comparable companies

Price to book ratio multiple

1.19

The higher the multiple, the higher the fair value

Enterprise value to EBITDA multiple

7.69

The higher the multiple, the higher the fair value

Discount for lack of marketability

15.80

%

The higher the discount for lack of marketability, the lower the fair value

Fair value as of December 31, 2019

Valuation technique

Significant unobservable input

Range (weighted average method)

Relationship of inputs to fair value

NT$000

Non-derivative debt instrument:

Foreign partnership interests

11,038

Discounted cash flow

Discount rate

0.30

%

The lower the discount rate, the higher the fair value

Non-derivative equity instrument:

Foreign unlisted stocks

121,808

Comparable companies

Price to book ratio multiple

1.22

The higher the multiple, the higher the fair value

Enterprise value to EBITDA multiple

10.51

The higher the multiple, the higher the fair value

Discount for lack of marketability

15.80

%

The higher the discount for lack of marketability, the lower the fair value

Summary of Effect of Profit or Loss or of Other Comprehensive Income from Financial Assets Categorized

						December 31, 2018
						Recognized in profit or loss								Recognized in other comprehensive income
		Input		Change		Favorable change				Unfavorable change				Favorable change				Unfavorable change
						NT$000				NT$000				NT$000				NT$000
Financial assets
Foreign partnership interests		Discount rate		Note			—				—				—				—
Foreign unlisted stocks		Price to book ratio multiple		± 1%			—				—				69				68
		Enterprise value to EBITDA multiple		± 1%			—				—				1,563				1,512
		Discount for lack of marketability		± 1%			—				—				2,093				2,050
							—				—				3,725				3,630

						December 31, 2019
						Recognized in profit or loss								Recognized in other comprehensive income
		Input		Change		Favorable change				Unfavorable change				Favorable change				Unfavorable change
						NT$000				NT$000				NT$000				NT$000
Financial assets
Foreign partnership interests		Discount rate		Note			—				—				—				—
Foreign unlisted stocks		Price to book ratio multiple		± 1%			—				—				53				53
		Enterprise value to EBITDA multiple		± 1%			—				—				850				900
		Discount for lack of marketability		± 1%			—				—				1,460				1,460
							—				—				2,363				2,413

X

- Definition

The disclosure of market risk. [Refer: Market risk [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 10
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DisclosureOfMarketRiskExplanatory
Namespace Prefix:	ifrs-full_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The disclosure of information that enables users of financial statements to evaluate the nature and extent of risks arising from financial instruments to which the entity is exposed. [Refer: Financial instruments, class [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 31
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_31&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsExplanatory
Namespace Prefix:	ifrs-full_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The disclosure of significant inputs for which market data are not available and that are developed using the best information available about the assumptions that market participants would use when measuring the fair value of the entity's own equity instruments. [Refer: Entity's own equity instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2019-01-01
-Paragraph 93
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2019-en-r&anchor=para_93_d&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfEquityExplanatory
Namespace Prefix:	ifrs-full_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The disclosure of a maturity analysis for non-derivative financial liabilities (including issued financial guarantee contracts) that shows the remaining contractual maturities. [Refer: Derivative financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 39
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_39_a&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_MaturityAnalysisForNonderivativeFinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The disclosure of the sensitivity analysis for types of market risk to which the entity is exposed, showing how profit or loss and equity would have been affected by changes in the relevant risk variable that were reasonably possible at that date. [Refer: Market risk [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 40
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_40_a&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk
Namespace Prefix:	ifrs-full_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of detailed information about fair value of financial instruments.

+ References

No definition available.

+ Details

Name:	imos_DisclosureOfDetailedInformationAboutFairValueOfFinancialInstrumentsExplanatory
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of fair value financial assets amortised cost.

+ References

No definition available.

+ Details

Name:	imos_DisclosureOfFairValueFinancialAssetsAmortisedCostExplanatory
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of loss rate methodology explanatory

+ References

No definition available.

+ Details

Name:	imos_DisclosureOfLossRateMethodologyExplanatory
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of movements in fair values of level3 investments explanatory.

+ References

No definition available.

+ Details

Name:	imos_DisclosureOfMovementsInFairValuesOfLevel3InvestmentsExplanatory
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of movements in relation to loss allowance for contract assets accounts receivable and other receivables explanatory

+ References

No definition available.

+ Details

Name:	imos_DisclosureOfMovementsInRelationToLossAllowanceForContractAssetsAccountsReceivableAndOtherReceivablesExplanatory
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Qualitative information and sensitivity analysis of changes in significant unobservable inputs under valuation model used in Level 3 fair value measurement explanatory

+ References

No definition available.

+ Details

Name:	imos_QualitativeInformationAndSensitivityAnalysisOfChangesInSignificantUnobservableInputsUnderValuationModelUsedInLevelFairValueMeasurementExplanatory
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Text block [abstract]

+ References

No definition available.

+ Details

Name:	imos_TextBlockAbstract
Namespace Prefix:	imos_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration