XML 47 R31.htm IDEA: XBRL DOCUMENT
v3.21.1

FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
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, 2019 and 2020.
(in US$ thousands) |  | 2019 |  |  | 2020 |
|  | Carrying amount |  |  | Fair value |  |  | Carrying amount |  |  | Fair value |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 57,743 |  |  | $ | 57,743 |  |  | $ | 45,702 |  |  | $ | 45,702 |
Accounts receivable |  |  | 368 |  |  |  | 368 |  |  |  | 275 |  |  |  | 275 |
Restricted cash |  |  | 531 |  |  |  | 531 |  |  |  | 300 |  |  |  | 300 |
Refundable deposits |  |  | 199 |  |  |  | 199 |  |  |  | 208 |  |  |  | 208 |
Marketable securities - noncurrent |  |  | — |  |  |  | — |  |  |  | 10,000 |  |  |  | 10,000 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  | 64 |  |  |  | 64 |  |  |  | 70 |  |  |  | 70 |
Accrued expenses |  |  | 1,280 |  |  |  | 1,280 |  |  |  | 1,516 |  |  |  | 1,516 |
Lease liabilities - current and noncurrent |  |  | 592 |  |  |  | 592 |  |  |  | 98 |  |  |  | 98 |
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 2020, a reconciliation of the beginning and ending balances are presented as follows:
(in US$ thousands) |  |  |  | Marketable Securities - Debt Securities |
|  |  |  | 2020 |
Balance at beginning of year |  |  |  | $ | — |
Purchase |  |  |  |  | 10,000 |
Total gains or (losses) (realized/unrealized) |  |  |  |  |  |
included in earnings |  |  |  |  | — |
included in other comprehensive income - unrealized gain (loss) on security |  |  |  |  | (351 | )
included in other comprehensive income - foreign currency items |  |  |  |  | 351 |
Balance at end of year |  |  |  | $ | 10,000 |
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. |  |  |  | $ | — |
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, 2020 are shown below:
Non-listed equity investments -Level 3 financial assets
Calculation Date | Valuation Technique | Significant Unobservable Inputs | Rate | Sensitivity of the Input to Fair Value
December 31, 2020 | The backsolve method to establish the equity value, and then the option pricing method to allocate the portion of the security value | Discount for lack of marketability (“DLOM”) | From 13.50% to 26.00% for different scenarios | 1% increase or decrease in DLOM would result in a variation in the fair value by approximately $120 thousand.
| Volatility | 41.0% | 1% increase or decrease in volatility would result in a variation in the fair value by less than $30 thousand.
Fair Value, Measurements, Recurring |
Summary of Assets and Liabilities Measured at Fair Value | Assets and liabilities measured at fair value on a recurring basis are summarized as below:
(in US$ thousands) |  | Fair Value Measurement Using |  |  |  |  |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | At December 31, 2020 |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents - time deposits |  | $ | — |  |  | $ | 6 |  |  | $ | — |  |  | $ | 6 |
Restricted cash - time deposits |  |  | — |  |  |  | 300 |  |  |  | — |  |  |  | 300 |
Marketable securities - noncurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  |  | — |  |  |  | — |  |  |  | 10,000 |  |  |  | 10,000 |
|  | $ | — |  |  | $ | 306 |  |  | $ | 10,000 |  |  | $ | 10,306 |
(in US$ thousands) |  | Fair Value Measurement Using |  |  |  |  |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | At December 31, 2019 |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents - time deposits |  | $ | — |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |
Restricted cash - time deposits |  |  | — |  |  |  | 531 |  |  |  | — |  |  |  | 531 |
|  | $ | — |  |  | $ | 538 |  |  | $ | — |  |  | $ | 538 |
Fair Value, Measurements, Nonrecurring |
Summary of Assets and Liabilities Measured at Fair Value | We recognized the cumulative effects of impairment on the operating lease ROU assets when initially applying the new leases accounting standard at January 1, 2019, as such impairments occurred before the date of initial application. Please see Note 1, “Principal Activities, Basis of Presentation, and Summary of Significant Accounting Policies”, for additional information. Assets and liabilities measured at fair value on a nonrecurring basis that were determined to be impaired as of December 31, 2019 and 2020 are summarized as below:
(in US$ thousands) |  | Fair Value measurement Using |  |  |  |  |  |  |  |  |
Assets |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | At December 31, 2020 |  |  | Total Impairment Losses |
(a) Prepaid licensing and royalty fees |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
(b) Property, plant and equipment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
(c) Intangible assets |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
(in US$ thousands) |  | Fair Value measurement Using |  |  |  |  |  |  |  |  |
Assets |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | At December 31, 2019 |  |  | Total Impairment Losses |
(a) Prepaid licensing and royalty fees |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 85 |
(b) Property, plant and equipment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 109 |
(c) Intangible assets |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 15 |
Total |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 209 |
(a) | Impairment losses on certain prepaid licensing and royalty fees which were determined to be impaired: In 2019, certain prepaid licensing and royalty fees were written down to zero, resulting in an impairment charge of $85 thousand. This impairment is included in operating expenses in the consolidated statements of operations. The impairment charges for the prepaid licensing and royalty fees related to certain licensed games within our digital entertainment business that we stopped operating or for which the carrying amounts of the related assets were determined not to be recoverable from their expected future undiscounted cash flows. The licensing fee and related royalties are re-valued when impairment exists, using unobservable inputs such as discounted cash flows, incorporating adjusted available market discount rate information and our Company’s estimates for liquidity risk, along with other cash flow model related assumptions.
(b) | Impairment losses on certain property, plant, and equipment which were determined to be impaired:
In 2019, we recognized an impairment loss of $109 thousand on property, plant and equipment as while the recent years’ operating losses were expected to continue in the short-term, the carrying amounts of those long-lived assets would not be recoverable based on cash flow projections.
(c) | Impairment losses on certain intangible assets which were determined to be impaired:
In 2019, we recognized an impairment loss of $15 thousand on intangible assets as while the recent years’ operating losses were expected to continue in the short-term, the carrying amounts of those intangible assets would not be recoverable based on cash flow projections.

X
- Definition Schedule of effect of significant unobservable inputs. + References No definition available. + Details
Name: | gigm_ScheduleOfEffectOfSignificantUnobservableInputsTableTextBlock
Namespace Prefix: | gigm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of gains or losses for the period included in earnings or resulted in a change to net assets, have arisen from the use of significant unobservable inputs (level 3) to measure the fair value of assets, liabilities, and financial instruments classified in shareholders' equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |