Immersion (IMMR) 10-K 5 Mar 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 26, 2021	Jun. 30, 2020
Document And Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Fiscal Year Focus	2020
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	000-38334
Entity Registrant Name	Immersion Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3180138
Entity Address, Address Line One	330 Townsend Street, Suite 234
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94107
City Area Code	408
Local Phone Number	467-1900
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	IMMR
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 80,883,149
Entity Common Stock, Shares Outstanding		30,088,019
Entity Central Index Key	0001058811
Document Fiscal Period Focus	FY
Amendment Flag	false
Documents Incorporated by Reference	Items 10 (as to directors and Delinquent Section 16(a) Reports (if any)), 11, 12 (as to Beneficial Ownership), 13 and 14 of Part III of this Annual Report on Form 10-K incorporate by reference portions of the Registrant’s definitive Proxy Statement for the 2021 Annual Meeting of Stockholders.
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 59,522	$ 86,478
Short-term investments	0	3,019
Accounts and other receivables	2,218	3,385
Prepaid expenses and other current assets	12,610	14,078
Total current assets	74,350	106,960
Property and equipment, net	209	1,226
Long-term deposits	12,571	7,062
Other assets, net	9,000	9,600
Total assets	96,130	124,848
Current liabilities:
Accounts payable	149	809
Accrued compensation	1,001	2,844
Other current liabilities	2,457	3,478
Deferred revenue	5,173	4,692
Total current liabilities	8,780	11,823
Long-term deferred revenue	21,334	25,952
Other long-term liabilities	2,035	3,316
Total liabilities	32,149	41,091
Commitments and contingencies (Note 5)
Stockholders’ equity:
Common stock and additional paid-in capital – $0.001 par value; 100,000,000 shares authorized; 39,161,214 and 38,624,784 shares issued, respectively; 27,017,781 and 31,414,328 shares outstanding, respectively	258,756	253,289
Accumulated other comprehensive income	122	124
Accumulated deficit	(113,164)	(118,565)
Treasury stock at cost: 12,143,433 and 7,210,456 shares, respectively	(81,733)	(51,091)
Total stockholders’ equity	63,981	83,757
Total liabilities and stockholders’ equity	$ 96,130	$ 124,848

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	39,161,214	38,624,784
Common stock, shares outstanding (in shares)	27,017,781	31,414,428
Treasury stock, shares (in shares)	12,143,433	7,210,456

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Revenue	$ 30,456	$ 35,953
Costs and expenses:
Cost of revenues	168	170
Sales and marketing	4,999	6,426
Research and development	5,014	7,840
General and administrative	18,055	42,968
Total costs and expenses	28,236	57,404
Operating income (loss)	2,220	(21,451)
Interest and other income	271	1,787
Other income (expense), net	668	91
Income (loss) before benefit from (provision for) income taxes	3,159	(19,573)
Benefit from (provision for) income taxes	2,242	(471)
Net income (loss)	$ 5,401	$ (20,044)
Basic net income (loss) per share (in dollars per share)	$ 0.19	$ (0.64)
Shares used in calculating basic net income (loss) per share (in shares)	28,117	31,529
Diluted net income (loss) per share (in dollars per share)	$ 0.19	$ (0.64)
Shares used in calculating diluted net income (loss) per share (in shares)	28,477	31,529
Other comprehensive income (loss), net of tax
Change in unrealized gains (losses) on short-term investments	$ (2)	$ 8
Total other comprehensive income (loss)	(2)	8
Total comprehensive income (loss)	5,399	(20,036)
Royalty and license
Revenues:
Revenue	30,176	35,643
Development, services, and other
Revenues:
Revenue	$ 280	$ 310

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2018		37,652,498			6,823,147
Stockholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2018	$ 99,660	$ 246,415	$ 116	$ (98,521)	$ (48,350)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(20,044)			(20,044)
Unrealized loss on available-for-sale securities, net of taxes	8		8
Stock repurchase (in shares)					387,309
Stock repurchases	(2,741)				$ (2,741)
Exercise of stock options, net of shares withheld for employee taxes (in shares)		173,993
Exercise of stock options	1,245	$ 1,245
Release of restricted stock units and awards (in shares)		776,552
Release of restricted stock units and awards	0
Issuance of stock for ESPP purchase (in shares)		21,741
Issuance of stock for ESPP purchase	165	$ 165
Stock based compensation	5,464	$ 5,464
Ending balance (in shares) at Dec. 31, 2019		38,624,784			7,210,456
Ending balance at Dec. 31, 2019	83,757	$ 253,289	124	(118,565)	$ (51,091)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,401			5,401
Unrealized loss on available-for-sale securities, net of taxes	$ (2)		(2)
Stock repurchase (in shares)	4,900,000				4,932,977
Stock repurchases	$ (30,642)				$ (30,642)
Exercise of stock options, net of shares withheld for employee taxes (in shares)		75,675
Exercise of stock options	577	$ 577
Release of restricted stock units and awards (in shares)		438,199
Release of restricted stock units and awards	0
Issuance of stock for ESPP purchase (in shares)		22,556
Issuance of stock for ESPP purchase	134	$ 134
Stock based compensation	4,756	$ 4,756
Ending balance (in shares) at Dec. 31, 2020		39,161,214			12,143,433
Ending balance at Dec. 31, 2020	$ 63,981	$ 258,756	$ 122	$ (113,164)	$ (81,733)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 5,401	$ (20,044)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	1,931	2,197
Stock-based compensation	4,756	5,464
Impairment of right-of-use lease asset	271	939
Foreign currency remeasurement gains (losses)	(427)	102
Deferred income taxes	(2,483)	431
Other	127	(3)
Changes in operating assets and liabilities:
Accounts and other receivables	1,167	(2,334)
Prepaid expenses and other current assets	1,486	(4,374)
Long-term deposits	(5,077)	(6,870)
Other assets	2,194	(4,509)
Accounts payable	(660)	(2,815)
Accrued compensation	(1,843)	(1,104)
Other current liabilities	(1,253)	(728)
Deferred revenue	(4,137)	(4,150)
Other long-term liabilities	(1,431)	3,699
Net cash (used in) provided by operating activities	22	(34,099)
Cash flows provided by (used in) investing activities:
Purchases of short-term investments	0	(8,930)
Proceeds from maturities of short-term investments	3,000	20,000
Purchases of property and equipment	(47)	(150)
Net cash provided by investing activities	2,953	10,920
Cash flows provided by (used in) financing activities:
Proceeds from issuance of common stock under employee stock purchase plan	134	165
Proceeds from stock options exercise	577	1,245
Cash paid for purchases of treasury stock	(30,642)	(2,741)
Net cash used in financing activities	(29,931)	(1,331)
Net decrease in cash and cash equivalents	(26,956)	(24,510)
Cash and cash equivalents:
Beginning of year	86,478	110,988
End of year	59,522	86,478
Supplemental disclosure of cash flow information:
Cash paid for taxes	65	160
Disclosure of non-cash operating, investing, and financing activities:
Release of Restricted Stock Units and Awards under company stock plan	3,016	7,190
Leased assets obtained in exchange for new operating lease liabilities	$ 577	$ 0

SIGNIFICANT ACCOUNTING POLICIES

SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
SIGNIFICANT ACCOUNTING POLICIES	SIGNIFICANT ACCOUNTING POLICIES Description of Business Immersion Corporation (the “Company”, “Immersion”, “we”, “our”, or “us”) was incorporated in 1993 in California and reincorporated in Delaware in 1999. We focus on the creation, design, development, and licensing of innovative haptic technologies that allow people to use their sense of touch more fully as they engage with products and experience the digital world around them. We have adopted a business model under which it provides advanced tactile software, related tools, technical assistance designed to help integrate our patented technology into our customers’ products or enhance the functionality of our patented technology to certain customers, and offers licenses to our patented technology to other customers. Impact of COVID-19 In March 2020, the World Health Organization declared the outbreak of COVID-19 a pandemic, which continues to spread throughout the U.S. and the world and has resulted in authorities implementing numerous measures to combat the spread of the virus, including travel bans and restrictions, quarantines, shelter-in-place orders, and business limitations and shutdowns. The COVID-19 outbreak and related public health measures have adversely affected workforce, organizations, consumers, economies, and financial markets globally, leading to an economic downturn and increased market volatility. Our compliance with these containment measures has impacted our day-to-day operations and could disrupt our business and operations, as well as that of our customers and suppliers for an extended period of time. To support the health and well-being of our employees, customers and communities, we implemented work-from-home and restricted travel policies in the first quarter of 2020, which are expected to remain in place for the first half of 2021 and beyond. In addition, many of our customers are working remotely, which may delay the timing of some orders due to their and our compliance with frequently changing government-mandated or recommended shelter-in-place orders in jurisdictions in which we, our customers and our suppliers operate. In response to certain anticipated impacts from the COVID-19 pandemic, we have also implemented a series of cost reduction initiatives to further preserve financial flexibility. These actions include: reductions of the base salaries and cash compensation of company executives and board members; cancellation and reduction in current year’s executive and employee bonus plans; renegotiated professional services fees from third-party services providers; relocation of certain positions to lower-cost regions; temporarily suspended company matching of our employee retirement savings plan and taking advantage of the broad-based employer relief provided by the governments. In April 2020, the Government of Canada announced the Canada Emergency Wage Subsidy (“CEWS”) for Canadian employers whose businesses were affected by the COVID-19 pandemic. The CEWS provides a subsidy of up to 75% of eligible employees’ employment insurable remuneration, subject to certain criteria. We applied for the CEWS to the extent we met the requirements to receive the subsidy. During 2020, we recorded $0.5 million in government subsidies as a reduction to operating expenses in the Consolidated Statements of Operations and Comprehensive Income (Loss). Principles of Consolidation and Basis of Presentation The accompanying consolidated financial statements include the accounts of Immersion Corporation and our wholly-owned subsidiaries. All intercompany accounts, transactions, and balances have been eliminated in consolidation. Use of Estimates The preparation of consolidated financial statements and related disclosures in accordance with U.S. GAAP (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results may differ materially from those estimates which were made based on the best information known to management at that time. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, useful lives of property and equipment, valuation of income taxes including uncertain tax provisions, stock-based compensation and income taxes. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Foreign Currency Translation The functional currency of our foreign subsidiaries is U.S. dollars. Accordingly, gains and losses from the remeasurement financial statements of the foreign subsidiaries into the U.S. dollars and from foreign currency transaction are included in our Consolidated Statements of Operations and Other Comprehensive Income (Loss). Significant Accounting Policies Cash Equivalents We consider all highly liquid instruments with an original or remaining maturity of 90 days or less at the date of purchase to be cash equivalents. Short-term Investments Our short-term investments consist of U.S treasury bills with an original or remaining maturity of greater than 90 days on the date of purchase. These investments are classified as available-for-sale and carried at fair market value. Even though the stated maturity dates of these debt securities may be one year or more beyond the balance sheet date, we classified all debt securities as short-term investments as they are reasonably expected to be realized in cash or sold within one year. Unrealized gains or losses on such securities are included in accumulated other comprehensive income (loss) in stockholders’ equity. Realized gains and losses from maturities of all such securities are reported in earnings and computed using the specific identification cost method. Realized gains or losses and charges for other-than-temporary declines in value, if any, on available-for-sale securities are reported in other income (expense), net, as incurred. We periodically evaluate these investments for other-than-temporary impairment. Fair Value of Financial Instruments Financial instruments consist primarily of cash equivalents, short-term investments, accounts receivable and accounts payable. Cash equivalents and short-term investments are stated at fair value based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. The recorded cost of accounts receivable and accounts payable approximate the fair value of the respective assets and liabilities. Property and Equipment Property and equipment are stated at cost and is depreciated using the straight-line method over the estimated useful life of the related asset. The estimated useful lives are typically as follows: Computer equipment and purchased software 3 years Machinery and equipment 3-5 years Furniture and fixtures 5 years Leasehold improvements are amortized over the shorter of the lease term or their estimated useful life. Total depreciation expense for property and equipment for years ended December 31, 2020 and 2019 were $1.1 million and $0.9 million, respectively. Long-lived Assets We evaluate our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of that asset may not be recoverable. An impairment loss would be recognized when the sum of the undiscounted future net cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount. Measurement of an impairment loss for long-lived assets and certain identifiable intangible assets that management expects to hold and use is based on the fair value of the asset. Leases We lease our office space under lease arrangements with expiration dates on or before February 29, 2024. We determine if an arrangement is a lease at inception under ASC 842 Leases. Our operating leases are accounted for as right-of-use (“ROU”) assets and lease liability obligations in our Consolidated Balance Sheets under Other assets , net, Other current liabilities and Other long-term liabilities , respectively. ROU assets represent our right to use an underlying asset for the lease term, and lease liability represent our obligation to make lease payments arising from the lease arrangements. ROU assets and lease liabilities are recognized at lease commencement date based on the present value of lease payments over the lease term. We elect to combine lease and non-lease components and account for them as a single lease component. As our leases typically do not provide an implicit rate, we estimate our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. ROU assets also include any lease payments made and exclude lease incentives and direct costs. Lease expense is recognized on a straight-line basis over the lease term. We elected to not present leases with an initial term of 12 months or less on our Consolidated Balance Sheets. Revenue Recognition Our revenue is primarily derived from fixed fee license agreements and per-unit royalty agreements, along with less significant revenue earned from development, services and other revenue. Fixed fee license revenue We recognize revenue from a fixed fee license agreement when our performance obligation has been satisfied, which typically occurs upon the transfer of rights to our technology upon the execution of the license agreement. In certain contracts, we grant a license to our existing patent portfolio at the inception of the license agreement as well as rights to the portfolio as it evolves throughout the contract term. For such arrangements, we have two separate performance obligations: • Performance Obligation A: Transfer of rights to our patent portfolio as it exists when the contract is executed; • Performance Obligation B: Transfer of rights to our patent portfolio as it evolves over the term of the contract, including access to new patent applications that the licensee can benefit from over the term of the contract. If a fixed fee license agreement contains only Performance Obligation A, we will recognize most or all of the revenue from the agreement at the inception of the contract. For fixed fee license agreements that contain both Performance Obligation A and B, we will allocate the transaction price based on the standalone price for each of the two performance obligations. We use a number of factors primarily related to the attributes of our patent portfolio to estimate standalone prices related to Performance Obligation A and B. Once the transaction price is allocated, the portion of the transaction price allocable to Performance Obligation A will be recognized in the quarter the license agreement is signed and the customer can benefit from rights provided in the contract, and the portion allocable to Performance Obligation B will be recognized on a straight-line basis over the contract term. For such contracts, a contract liability account will be established and included within Deferred revenue and Long-term deferred revenue on the Consolidated Balance Sheets. As the rights and obligations in a contract are interdependent, contract assets and contract liabilities that arise in the same contract are presented on a net basis. Some of our license agreements contain fixed fees related to past infringements. Such fixed fees are recognized as revenue or recorded as a deduction to our operating expense in the quarter the license agreement is signed. Payments for fixed fee license contracts typically are due in full within 30 - 45 days from execution of the contract. From time to time, we enter into a fixed fee license contract with payments due in a number of installments payable throughout the contract term. In such cases, we determine if a significant financing component exists and if it does, we will recognize more or less revenue and corresponding interest expense or income, as appropriate. Per-unit Royalty revenue We record per-unit royalty revenue in the same period in which the licensee’s underlying sales occur. As we generally do not receive the per-unit licensee royalty reports for sales during a given quarter within the time frame that allows us to adequately review the reports and include the actual amounts in our quarterly results for such quarter, we accrue the related revenue based on estimates of our licensees’ underlying sales, subject to certain constraints on our ability to estimate such amounts. We develop such estimates based on a combination of available data including, but not limited to, approved customer forecasts, a lookback at historical royalty reporting for each of our customers, and industry information available for the licensed products. As a result of accruing per-unit royalty revenue for the quarter based on such estimates, adjustments will be required in the following quarter to true up revenue to the actual amounts reported by its licensees. We recorded $0.1 million and $20,000 adjustments to decrease royalty revenue during the three months ended March 31, and June 30, 2020, respectively. We recorded $0.3 million and $0.6 million adjustments to increase royalty revenue during the three months ended September 30, and December 31, 2020, respectively. During the three months ended December 31, 2019 and September 30, 2019, we recorded $0.2 million and $0.1 million adjustments to decrease royalty revenue, respectively. During the three months ended June 30 and March 31, 2019, we recorded adjustments to increase royalty revenue by $0.2 million and $0.1 million, respectively. These adjustments represent the difference between the estimated per-unit royalty revenue we reported during the quarter and actual per-unit royalty revenue reported by our licensees after the quarterly reporting. Certain of our per-unit royalty agreements contain minimum royalty provisions which sets forth minimum amounts to be received by us during the contract term. Under Accounting Standard Codification 606, Revenue from Contracts with Customers , (“ASC 606”), minimum royalties are considered a fixed transaction price to which we have an unconditional right once all other performance obligations, if any, are satisfied. We recognize all minimum royalties as revenue at the inception of the license agreement, or in the period in which all remaining revenue recognition criteria have been met. We account for the unbilled minimum royalties as contract assets as Prepaid and other current assets and Other assets, net on our Consolidated Balance Sheets, and the balance of such contract assets will be reduced by the actual royalties to be reported by the licensee during the contract term until fully utilized, after which point any excess per-unit royalties reported are recognized as revenue. As the rights and obligations in a contract are interdependent, contract assets and contract liabilities that arise in the same contract are presented on a net basis. Payments of per-unit royalties typically are due within 30 to 60 days from the end of the quarter in which the underlying sales took place. Development, services, and other revenue As the performance obligation related to our development, service and other revenue is satisfied over a period of time, we recognize such revenue evenly over the period of performance obligations, which is generally consistent with the contractual term. Deferred Revenue Deferred revenue consists of amounts that have been invoiced or paid, but have not been recognized as revenue. The amounts are primarily derived from our fixed license fee agreements under which we are obliged to transfer both rights to our patent portfolio that exists when the contract is executed and rights to its patent portfolio as it evolves over the contract term. Deferred revenue that will be recognizable during the succeeding 12-month period is recorded as Deferred Revenu e, and the remaining deferred revenue is recorded as Long-term deferred revenue on the Consolidated Balance Sheets. Capitalized Contract Costs We capitalize certain incremental costs incurred, such as commissions, in order to obtain new contracts with our customers if we expect to recover these costs. The capitalized contract costs are amortized on a straight-line basis over the term of the contract. Advertising Advertising costs (including obligations under cooperative marketing programs) are expensed as incurred and included in Sales and Marketing expense on Consolidated Statement of Operations and Comprehensive Income (Loss). Advertising expense was as follows (in thousands): Year ended December 31, 2020 2019 Advertising expense $ 180 $ 173 Research and Development Research and development expenses primarily consisted of personnel-related costs, including payroll and stock-based compensation, outside consulting expenses and allocations of corporate overhead expenses. Research and development costs are expensed as incurred. Income Taxes We use the asset and liability method of accounting for income taxes. Under this method, income tax expense is recognized for the amount of taxes payable or refundable for the current year. In addition, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities, and for operating losses and tax credit carryforwards. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized and are reversed at such time that realization is believed to be more likely than not. Software Development Costs Costs for the development of new software products and substantial enhancements to existing software products associated with the development of products for sale are expensed to research and development expense until technological feasibility has been established, at which time any additional costs would be capitalized. We consider technological feasibility to be established upon completion of a working model of the software. Because we believe our current process for developing software is essentially completed concurrently with the establishment of technological feasibility, no costs have been capitalized to date. Stock-based Compensation We recognize stock-based compensation cost for shares, net of estimated forfeiture over the requisite service period of the award, which is the vesting period. We use the Black-Scholes Merton option pricing model to determine the fair value of stock options and employee stock purchase plan shares. We estimate the fair value of market-performance based stock options and restricted stock units using a Monte Carlo simulation model which requires the input of assumptions, including expected term, stock price volatility and the risk-free rate of return. In addition, judgment is also required in estimating the number of stock-based awards that are expected to be forfeited. Forfeitures are estimated based on historical experience at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Concentration of Credit Risks Financial instruments that potentially subject to a concentration of credit risk principally consist of cash, cash equivalents, short term investments, and accounts receivable. We are also subject to a concentration of revenues given certain key licensees that contributed a significant portion of our total revenue. See Note 12. Segment Reporting, Geographic Information and Significant Customers of the Notes to Consolidated Financial Statements for more details on customer revenue concentration. We invest primarily in money market accounts and highly liquid debt instruments purchased with an original or remaining maturity of greater than 90 days on the date of purchase. Deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand. We license technology primarily to companies in North America, Europe, and Asia. To reduce credit risk, management performs periodic credit evaluations of the financial conditions of our customer. We periodically evaluate potential credit losses to ensure adequate reserves are maintained, but historically we have not experienced any significant losses related to individual customers or groups of customers in any particular industry or geographic area. As such, our reserves for credit losses for the years ended December 31, 2020 and December 31, 2019 were not material due to our low credit risk. Certain Significant Risks and Uncertainties We operate in multiple industries and our operations can be affected by a variety of factors. For example, management believes that changes in any of the following areas could have a negative effect on our future financial position and results of operations: the mix of revenues; the loss of significant customers; fundamental changes in the technologies and our licensees’ products; market acceptance of our and our licensees’ products under development; development of sales channels; litigation or other claims in which we are involved; the ability to successfully assert its patent rights against others; the impact of changing economic conditions; the hiring, training, and retention of key employees; successful and timely completion of product and technology development efforts; and new product or technology introductions by competitors. Segment Information We develop, license, and support a wide range of software and IP that more fully engage users’ senses of touch when operating digital devices. We focus on the following target application areas: mobile devices, wearables, consumer, mobile entertainment and other content; console gaming; automotive; medical; and commercial. We manage these application areas in one operating and reporting segment with only one set of management, development, and administrative personnel. Our chief operating decision maker (“CODM”) is the Chief Executive Officer. The CODM approves budgets and allocates resources to and assesses our business performance using information about our revenue and operating loss. There is only one segment that is reported to management. Recently Adopted Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). This guidance requires financial assets measured at amortized cost to be presented at the net amount expected to be collected based on historical events, current conditions and forecast information. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2019 and early adoption is permitted. We adopted ASU 2016-13 as of January 1, 2020. The adoption of this new accounting standard did not have a material impact on our consolidated financial statements. In December 2019, the FASB issued Accounting Standard Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (ASU 2019-12), which enhances and simplifies various aspects of the income tax accounting guidance, including requirements such as tax basis step-up in goodwill obtained in a transaction that is not a business combination, ownership changes in investments, and interim-period accounting for enacted changes in tax law. The amendment is effective for public companies with fiscal years beginning after December 15, 2020; early adoption is permitted. We adopted ASU 2019-12 as of January 1, 2021. The adoption of this new accounting standard did not have a material impact on our consolidated financial statements.

REVENUE RECOGNITION

REVENUE RECOGNITION	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION Disaggregated Revenue The following table presents the disaggregation of our revenue for the years ended December 31, 2020 and 2019 (in thousands): Years Ended December 31, 2020 2019 Fixed fee license revenue $ 5,472 $ 12,627 Per-Unit royalty revenue 24,704 23,016 Total royalty and license revenue 30,176 35,643 Development, services, and other 280 310 Total revenues $ 30,456 $ 35,953 As of December 31, 2020, we had contract assets of $11.6 million included within Prepaid expenses and other current asset s, and $4.6 million included within Other assets, net on the Consolidated Balance Sheets. As of December 31, 2019, we had contract assets of $13.1 million included within P repaid expenses and other current assets , and $6.9 million included within Other assets on the Consolidated Balance Sheets. Contract assets decreased by $3.8 million from January 1, 2020 to December 31, 2020, primarily due to actual royalties billed during the year. Contracted Revenue Based on contracts signed and payments received as of December 31, 2020, we expect to recognize $26.4 million revenue related to Performance Obligation B under our fixed fee license agreements, which are satisfied over time, including $14.4 million over one to three years and $12.0 million over more than three years. Capitalized Contract Costs During 2020, we capitalized $0.2 million of incremental costs incurred to obtain new contracts with customers.

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES	FAIR VALUE DISCLOSURES Cash Equivalents and Short-term Investments Our financial instruments measured at fair value on a recurring basis are cash equivalents and short-term investments. Our fixed income available-for-sale securities consist of high quality, investment grade securities. We value these securities based on pricing from pricing vendors, who may use quoted prices in active markets for identical assets (Level 1) or inputs other than quoted prices that are observable either directly or indirectly (Level 2) in determining fair value. Financial instruments are valued based on quoted market prices in active markets include mostly money market securities. Such instruments are generally classified within Level 1 of the fair value hierarchy. Instruments based on quoted prices in markets that are less active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency are generally classified within Level 2 of the fair value hierarchy and include U.S. treasury securities. Instruments valued based on unobservable inputs which reflect the reporting entity’s own assumptions or data that market participants would use in valuing an instrument are generally classified within Level 3 of the fair value hierarchy. As of December 31, 2020, and 2019, we did not hold any Level 3 instruments. We had no other-than-temporary impairment charges recorded in the years ended December 31, 2020 and 2019. Financial instruments measured at fair value on a recurring basis as of December 31, 2020 and December 31, 2019 are classified based on the fair value hierarchy in the table below (in thousands): December 31, 2020 Total Fair Value Measurements Using Quoted Prices Significant Significant Assets: Money market accounts $ 45,614 $ — $ — $ 45,614 Total assets at fair value 1 $ 45,614 $ — $ — $ 45,614 (1) The above table excludes $13.9 million of cash held in banks. December 31, 2019 Total Fair Value Measurements Using Quoted Prices Significant Significant Assets: Money market accounts $ 63,351 $ — $ — $ 63,351 U.S. Treasury securities — 3,019 — 3,019 Total assets at fair value 2 $ 63,351 $ 3,019 $ — $ 66,370 (2) The above table excludes $23.1 million of cash held in banks as of December 31, 2019. The contractual maturity dates of our available-for-sale securities on December 31, 2019 and 2020 were all due within one Money market accounts are classified as cash equivalents and U.S. Treasury securities (classified as available-for-sale securities), with maturity dates less than one year, are within short-term investments on our Consolidated Balance Sheets. Short-term Investments Short-term investments as of December 31, 2019 consisted of the following (in thousands): December 31, 2019 Amortized Gross Gross Fair U.S. Treasury securities $ 3,018 $ 1 $ — $ 3,019 Total $ 3,018 $ 1 $ — $ 3,019

BALANCE SHEET DETAILS

BALANCE SHEET DETAILS	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BALANCE SHEET DETAILS	BALANCE SHEETS DETAILS Cash and Cash Equivalents Our cash and cash equivalent balances were as follows (in thousands): December 31, 2020 2019 Cash $ 13,908 $ 23,127 Money market funds 45,614 63,351 Cash and cash equivalents $ 59,522 $ 86,478 Accounts and Other Receivables Accounts and other receivables were as follows (in thousands): December 31, 2020 2019 Trade accounts receivable $ 1,618 $ 2,972 Other receivables 600 413 Accounts and other receivables $ 2,218 $ 3,385 Allowance for credit losses as of December 31, 2020 and 2019 were not material. Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets were as follows (in thousands) December 31, 2020 2019 Prepaid expenses $ 816 $ 933 Contract assets - current 11,623 13,128 Other current assets 171 17 $ 12,610 $ 14,078 Property and Equipment, Net Property and equipment, net are as follows (in thousands): December 31, 2020 2019 Computer equipment and purchased software $ 2,548 $ 3,011 Machinery and equipment 423 699 Furniture and fixtures 1,104 1,115 Leasehold improvements 1 3,892 3,897 Total 7,967 8,722 Less accumulated depreciation and amortization 1 (7,758) (7,496) Property and equipment, net $ 209 $ 1,226 1 In the fourth quarter 2019, we announced our decision to exit the San Jose California facility (“SJ Facility”) by March 31, 2020. We accelerated the amortization of our SJ Facility leasehold improvements over the remaining estimated life to March 31, 2020. As of December 31, 2019, the net book value of the SJ Facility leasehold improvements was $0.9 million and it was fully amortized by March 31, 2020. Other Assets, Net Other assets, net are as follows (in thousands): December 31, 2020 2019 Contract assets - Long-term $ 4,596 $ 6,928 Lease right-of-use assets 1,607 2,202 Deferred tax assets 2,659 470 Other assets 138 — Total other assets, net $ 9,000 $ 9,600 Other Current Liabilities Other current liabilities are as follows (in thousands): December 31, 2020 2019 Accrued legal $ 202 $ 1,077 Lease liabilities - current 1,382 1,150 Other current liabilities 873 1,251 Total other current liabilities $ 2,457 $ 3,478

CONTINGENCIES

CONTINGENCIES	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES From time to time, we receive claims from third parties asserting that our technologies, or those of our licensees, infringe on the other parties’ IP rights. Management believes that these claims are without merit. Additionally, periodically, we are involved in routine legal matters and contractual disputes incidental to our normal operations. In management’s opinion, unless we disclosed otherwise, the resolution of such matters will not have a material adverse effect on our consolidated financial condition, results of operations, or liquidity. In the normal course of business, we provide indemnification of varying scope to customers, most commonly to licensees in connection with licensing arrangements that include our IP, although these provisions can cover additional matters. Historically, costs related to these guarantees have not been significant, and we are unable to estimate the maximum potential impact of these guarantees on its future results of operations. Samsung Electronics Co. v. Immersion Corporation and Immersion Software Ireland Limited On April 28, 2017, Immersion and Immersion Software Ireland Limited (collectively, “Immersion”) received a letter from Samsung Electronics Co. (“Samsung”) requesting that we reimburse Samsung with respect to withholding tax and penalties imposed on Samsung by the Korean tax authorities following an investigation where the tax authority determined that Samsung failed to withhold taxes on Samsung’s royalty payments to Immersion Software Ireland from 2012 to 2016. On July 12, 2017, on behalf of Samsung, Immersion filed an appeal with the Korea Tax Tribunal regarding their findings with respect to the withholding taxes and penalties. On October 18, 2018, the Korea Tax Tribunal held a hearing and on November 19, 2018, the Korea Tax Tribunal issued its ruling in which it decided not to accept our arguments with respect to the Korean tax authorities’ assessment of withholding tax and penalties imposed on Samsung. On behalf of Samsung, we filed an appeal with the Korea Administrative Court on February 15, 2019. On July 16, 2020, the Korea Administrative Court issued its ruling in which it ruled that the withholding taxes and penalties which were imposed by the Korean tax authorities on Samsung should be cancelled with some litigation costs to be borne by the Korean tax authorities. On August 1, 2020, the Korean tax authorities filed an appeal with the Korea High Court. The first hearing in the Korea High Court occurred on November 11, 2020. A second hearing occurred on January 13, 2021. A third hearing is scheduled for March 21, 2021. On September 29, 2017, Samsung filed an arbitration demand with the International Chamber of Commerce against us demanding that we reimburse Samsung for the imposed tax and penalties that Samsung paid to the Korean tax authorities. Samsung is requesting that we pay Samsung the amount of KRW 7,841,324,165 (approximately $6.9 million) plus interest from and after May 2, 2017, plus the cost of the arbitration including legal fees. On March 27, 2019, we received the final award. The award ordered Immersion to pay Samsung KRW 7,841,324,165 (approximately $6.9 million as of March 31, 2019) which we paid on April 22, 2019 and recorded in Long-term deposit on our Consolidated Balance Sheets. The award also denied Samsung’s claim for interest from and after May 2, 2017 and ordered Immersion to pay Samsung’s cost of the arbitration in the amount of approximately $871,454, which was paid in 2019. We believe that there are valid defenses to all of the claims from the Korean tax authorities. We intend to vigorously defend against the claims from the Korean tax authorities. We expect to be reimbursed by Samsung to the extent we ultimately prevail in the appeal in the Korea courts. On March 31, 2019, $6.9 million was recorded as a deposit included in Long-term deposits on our Consolidated Balance Sheets. In the event that we do not ultimately prevail in our appeal in the Korean courts, the deposit included in Long-term deposits would be recorded as additional income tax expense on our Consolidated Statements of Operations and Comprehensive Income (Loss), in the period in which we do not ultimately prevail. LGE Korean Withholding Tax Matter On October 16, 2017, we received a letter from LG Electronics Inc. (“LGE”) requesting that we reimburse LGE with respect to withholding tax imposed on LGE by the Korean tax authorities following an investigation where the tax authority determined that LGE failed to withhold on LGE’s royalty payments to Immersion Software Ireland from 2012 to 2014. Pursuant to an agreement reached with LGE, on April 8, 2020, we provided a provisional deposit to LGE in the amount of KRW 5,916,845,454 (approximately $5.0 million) representing the amount of such withholding tax that was imposed on LGE, which provisional deposit would be returned to us to the extent we ultimately prevail in the appeal in the Korea courts. In the second quarter of 2020, we recorded this deposit in Long-term deposits on our Condensed Consolidated Balance Sheets. In the event that we do not ultimately prevail in our appeal in the Korean courts, the deposit included in Long-term deposits would be recorded as additional income tax expense on our Condensed Consolidated Statement of Operations and Comprehensive Loss, in the period in which we do not ultimately prevail. On November 3, 2017, on behalf of LGE, we filed an appeal with the Korea Tax Tribunal regarding their findings with respect to the withholding taxes. The Korea Tax Tribunal hearing took place on March 5, 2019. On March 19, 2019, the Korea Tax Tribunal issued its ruling in which it decided not to accept our arguments with respect to the Korean tax authorities’ assessment of withholding tax and penalties imposed on LGE. On behalf of LGE, we filed an appeal with the Korea Administrative Court on June 10, 2019. The first hearing occurred on October 15, 2019. A second hearing occurred on December 19, 2019. A third hearing occurred on February 13, 2020. A fourth hearing occurred on June 9, 2020. A fifth hearing occurred on July 16, 2020. We anticipated a decision to be rendered on or about October 8, 2020, but the Korea Administrative Court scheduled and held a sixth hearing for November 12, 2020. A seventh hearing occurred on January 14, 2021. An eighth hearing is scheduled for April 8, 2021 We believe that there are valid defenses to the claims raised by the Korean tax authorities and that LGE’s claims are without merit. We intend to vigorously defend ourselves against these claims. In the event that we do not ultimately prevail in our appeal in the Korean courts, any payments to LGE with respect to withholding tax imposed on LGE by the Korean tax authorities as described in the previous paragraph would be recorded as additional income tax expense on the Consolidated Statement of Operations and Comprehensive Income (Loss), in the period in which we do not ultimately prevail.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION Stock Options and Awards Our equity incentive program is a long-term retention program that is intended to attract, retain, and provide incentives for employees, consultants, officers, and directors and to align stockholder and employee interests. We may grant time-based options, market condition-based options, stock appreciation rights, restricted stock (“RSAs”), restricted stock units (“RSUs”), performance shares, market condition-based performance restricted stock units (“PSUs”), and other stock-based equity awards to employees, officers, directors, and consultants. Under this program, stock options may be granted at prices not less than the fair market value on the date of grant for stock options. Stock options generally vest over four years and expire seven A summary of our equity incentive program is as follows (in thousands): December 31, 2020 Common stock shares available for grant 3,254 Stock options outstanding 828 RSAs outstanding 130 RSUs outstanding 802 PSUs outstanding 250 Time-Based Stock Options The following summarizes activities for the time-based stock options for the year ended December 31, 2020: Number of Shares Weighted Average Weighted Average Aggregate Outstanding at December 31, 2019 967 $ 8.55 5.63 $ 16 Granted 456 7.58 Exercised (76) 7.62 Canceled or expired (519) 8.46 Outstanding as of December 31, 2020 828 $ 8.16 4.36 $ 2,628 Vested and expected to vest at December 31, 2020 734 $ 8.24 4.20 $ 2,273 Exercisable at December 31, 2020 362 $ 8.26 2.71 $ 887 Aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the exercise price of our common stock for the options that were in-the-money. For the year ended December 31, 2020 and 2019, the weighted average grant date fair value was $2.21 and $3.69, respectively. For the years ended December 31, 2020 and 2019, the aggregate intrinsic value of stock options exercised was $0.1 million and $0.2 million, respectively. Restricted Stock Units The following summarizes RSUs activities for the year ended December 31, 2020: Number of Restricted Stock Unis Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Life (Years) Aggregate Outstanding at December 31, 2019 945 $ 8.81 1.25 $ 7,020 Granted 515 5.95 Released (367) 9.01 Forfeited (291) 8.53 Outstanding at December 31, 2020 802 $ 6.98 1.00 $ 9,057 The aggregate intrinsic value is calculated as the market value as of the end of the reporting period. Restricted Stock Awards The following summarizes RSA activities for the year ended December 31, 2020: Number of Restricted Stock Awards (in thousands) Weighted Average Grant Date Fair Value Weighted Average Remaining Recognition Period Outstanding at December 31, 2019 91 $ 7.45 0.45 Granted 142 6.43 Released (71) 7.18 Forfeited (32) 7.27 Outstanding at December 31, 2020 130 $ 6.53 0.45 Market Condition-Based Restricted Stock Units In 2020, we granted 250,000 shares of PSUs to our executives. Each PSU represents the right to one share of our common stock. These equity awards will vest if the volume-weighted closing price of our common stock exceeds certain levels for a number of trading days within a specified time frame. These awards vest over four years, with 25% eligible for vesting on the first anniversary of the grant date and remaining shares vesting on quarterly basis over the following three years. We have 250,000 shares of PSUs outstanding as of December 31, 2020. Employee Stock Purchase Plan Under the 1999 Employee Stock Purchase Plan (“ESPP”), eligible employees may purchase common stock through payroll deductions at a purchase price of 85% of the lower of the fair market value of our common stock at the beginning of the offering period or the purchase date. Participants may not purchase more than 2,000 shares in a six-month offering period or purchase stock having a value greater than $25,000 in any calendar year as measured at the beginning of the offering period. A total of 1.0 million shares of common stock has been reserved for issuance under the ESPP. During the year ended December 31, 2020, 22,556 shares were purchased under the ESPP with average purchase price of $5.96. As of December 31, 2020, 230,881 shares were available for future purchase under the ESPP. Stock-based Compensation Expense Valuation and amortization methods Stock-based compensation is based on the estimated fair value of awards, net of estimated forfeitures, and recognized over the requisite service period. Estimated forfeitures are based on historical experience at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The stock-based compensation related to all of our stock-based awards and ESPP for the years ended December 31, 2020 and 2019 is as follows (in thousands): For the Years Ended 2020 2019 Stock options $ 1,062 $ 701 RSUs, RSAs and PSUs 3,638 4,692 ESPP 56 71 Total $ 4,756 $ 5,464 Sales and marketing $ 846 $ 947 Research and development 870 1,304 General and administrative 3,040 3,213 Total $ 4,756 $ 5,464 We use the Black-Scholes-Merton option pricing model to determine the fair value of our time-based options and ESPP shares. All share-based payment awards are amortized on a straight-line basis over the requisite service periods of the awards, which are generally the vesting periods. The determination of the fair value of share-based awards on the date of grant using an option pricing model is affected by our stock price as well as assumptions regarding a number of complex and subjective variables. These variables include actual and projected employee stock option exercise behaviors that impact the expected term, our expected stock price volatility over the term of the awards, risk-free interest rate, and expected dividend. We use the Monte Carlo Simulation model to value the stock options and restricted stock units with a market condition. Valuation techniques such as a Monte Carlo Simulation model have been developed to value path-dependent awards. The Monte Carlo Simulation model is a generally accepted statistical technique used, in this instance, to simulate a range of our future stock prices. Expected term — We estimate the expected term of options granted by calculating the average term from our historical stock option exercise experience. The expected term of ESPP shares is the length of the offering period. Expected volatility — We estimate the volatility of our common stock taking into consideration our historical stock price movement and our expected future stock price trends based on known or anticipated events. Risk-free interest rate — We base the risk-free interest rate that is used in the option pricing model on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term on the options. Expected dividend — We do not anticipate paying any cash dividends in the foreseeable future and therefore use an expected dividend yield of zero in the option-pricing model. Forfeitures — We are required to estimate future forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. We use historical data to estimate pre-vesting option and RSU forfeitures and record stock-based compensation expense only for those awards that are expected to vest. The assumptions used to value options granted under our equity incentive program are as follows: Time-based stock options: For the Year Ended 2020 2019 Expected life (in years) 4.2 4.4 Volatility 52% 55% Interest rate 1.0% 2.0% Dividend yield — — Market condition based restricted stock units: For the Year Ended 2020 2019 1 Expected life (in years) 1.2 N/A Volatility 52% N/A Interest rate 1.0% N/A Dividend yield — N/A (1) No market condition based restricted stock units were granted during the year ended December 31, 2019. As of December 31, 2020, there was $6.6 million of unrecognized compensation cost adjusted for estimated forfeitures related to non-vested stock options, RSUs, RSAs and PSUs granted to our employees and directors. This unrecognized compensation cost will be recognized over an estimated weighted-average period of approximately 1.9 years. Total unrecognized compensation cost will be adjusted for future changes in estimated forfeitures.

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Stock Repurchase Program On November 1, 2007, our Board of Directors (the “Board”) authorized the repurchase of up to $50 million of our common stock (the “Stock Repurchase Program”). In addition, on October 22, 2014, the Board authorized another $30 million under the Stock Repurchase Program. We may repurchase our common stock for cash in the open market in accordance with applicable securities laws. The timing and amount of any stock repurchase will depend on share price, corporate and regulatory requirements, economic and market conditions, and other factors. The stock repurchase authorization has no expiration date, does not require us to repurchase a specific number of shares, and may be modified, suspended, or discontinued at any time.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Income tax benefit from (provisions for) the years ended December 31, 2020 and 2019 consisted of the following (in thousands): For the Year Ended 2020 2019 Income (loss) before provision for income taxes $ 3,159 $ (19,573) Benefit from (provision for) income taxes 2,242 (471) Effective tax rate (71.0) % (2.4) % The 2020 and 2019 benefit from (provision for) income taxes resulted primarily from estimated foreign taxes, foreign withholding tax expense and the release of a $2.2 million valuation allowance from one of our foreign entities in 2020. The components of our income (loss) before benefit from (provision for) income taxes were as follows (in thousands): For the Year Ended 2020 2019 Domestic $ (4,602) $ (17,970) Foreign 7,761 (1,603) Total $ 3,159 $ (19,573) The benefit from (provisions for) income taxes consisted of the following (in thousands): For the Year Ended 2020 2019 Current: U.S, federal — $ — States and local (3) (3) Foreign (114) (190) Total current $ (117) $ (193) Deferred: U.S, federal — — States and local — — Foreign 2,359 (278) Total deferred 2,359 (278) Total benefit from (provision for) income taxes $ 2,242 $ (471) On July 27, 2015, a U.S. Tax Court opinion (Altera Corporation et. al v. Commissioner) concerning the treatment of stock-based compensation expense in an intercompany cost sharing arrangement was issued. In its opinion, the U.S. Tax Court accepted Altera's position of excluding stock-based compensation from its intercompany cost sharing arrangement. On February 19, 2016, the IRS appealed the ruling to the U.S. Court of Appeals for the Ninth Circuit (the "Ninth Circuit"). On July 24, 2018, the Ninth Circuit reversed the 2015 decision of the U.S. Tax Court that had found certain Treasury regulations related to stock-based compensation to be invalid. On August 7, 2018, the Ninth Circuit withdrew its July 24, 2018 opinion to allow a reconstituted panel to confer on the decision. This reconstituted panel reconsidered the validity of the cost sharing regulations at issue. The regulations at issue require related entities to share the cost of employee stock compensation in order for their cost-sharing arrangements to be classified as “qualified cost-sharing arrangements” and to avoid potential IRS adjustment. On June 7, 2019, the reconstituted panel of the Ninth Circuit upheld the 2018 decision of the Ninth Circuit, concluding stock-based compensation must be included in intercompany cost sharing agreements for the agreements to be classified as “qualified cost-sharing arrangements”. On July 22, 2019, Altera filed a petition for an en banc rehearing with the Ninth Circuit which was denied. On February 10, 2020, Altera filed an appeal with the United States Supreme Court (the “Supreme Court”) for review. We will continue to monitor ongoing developments and potential impacts to our consolidated financial statements. On June 22, 2020, the Supreme Court announced that it was denying the petition for certiorari for Altera Corporation & Subsidiaries v. Commissioner, 926 F.3d. 1061 (2019). The denial to hear the case puts an end to the Altera’s Ninth Circuit stock-based compensation challenge. As such, we have made corresponding provisions. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was passed into law. The CARES Act includes several significant business tax provisions including modification to the taxable income limitation for utilization of net operating losses (“NOLs”) incurred in 2018, 2019 and 2020 and the ability to carry back NOLs from those years for a period of up to five years, an increase to the limitation on deductibility of certain business interest expense, bonus depreciation for purchases of qualified improvement property and special deductions on certain corporate charitable contributions. We analyzed the provisions of the CARES Act and determined there was no net effect on our provision for the year ended December 31, 2020. On December 22, 2017, the Tax Act was passed into law. Among other changes, the Tax Act reduced the US federal corporate income tax rate from 35% to 21%, required companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and created new taxes on certain foreign sourced earnings. In addition, the Act introduced the Base Erosion and Anti-Abuse Tax (the “BEAT”), which creates a new tax on certain related-party payments. We concluded that we have not met the threshold requirements of the BEAT. On July 9, 2020, the Internal Revenue Service issued final regulations regarding deductions for global intangible low-taxed income (“GILTI”) and foreign-derived intangible income (“FDII”). On July 9, 2020, the Treasury Department released final regulations ("TD 9901") under IRC Section 250, which allows an annual deduction to a domestic corporation for its foreign-derived intangible income ("FDII") and global intangible low-taxed income ("GILTI") inclusion. The final guidance is not expected to have a material impact on our condensed consolidated financial statements. Although the measurement period has closed, further technical guidance related to the Tax Act, including final regulations on a broad range of topics, is expected to be issued. In accordance with ASC 740 Income Taxes ("ASC 740"), we will recognize any effects of the guidance in the period that such guidance is issued. Deferred tax assets and liabilities are recognized for the temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, tax losses, and credit carryforwards. Significant components of the net deferred tax assets and liabilities consisted of (in thousands); December 31, 2020 2019 Deferred tax assets: Net operating loss carryforwards $ 9,239 $ 4,936 State income taxes 1 1 Deferred revenue 5,426 6,291 Research and development and other credits 8,638 8,282 Reserve and accruals recognized in different periods 1,027 1,128 Capitalized research and development expenses 3,318 3,447 Depreciation and amortization 3,134 3,636 Lease liability 351 806 Total deferred tax assets 31,134 28,527 Valuation allowance (28,475) (28,057) Net deferred tax assets 2,659 470 Deferred tax liabilities: Right of use lease assets (344) (466) Foreign credits (14) (23) Other deferred tax liabilities — (40) Total deferred tax liabilities (358) (529) Net deferred taxes $ 2,301 $ (59) We account for deferred taxes under ASC 740 which requires a reduction of the carrying amounts of deferred tax assets by a valuation allowance if, based on available evidence, it is more likely than not that such assets will not be realized. Accordingly, the need to establish valuation allowances for deferred tax assets is assessed periodically based on the ASC 740 more-likely-than-not realization ("MLTN") threshold criterion. This assessment considers matters such as future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. The evaluation of the recoverability of the deferred tax assets requires that we weigh all positive and negative evidence to reach a conclusion that it is more likely than not that all or some portion of the deferred tax assets will not be realized. The weight given to the evidence is commensurate with the extent to which it can be objectively verified. As of December 31, 2020, based on our assessment of the realizability of our deferred tax assets, we continued to maintain a full valuation allowance against all of our U.S. federal and state net deferred tax assets. The valuation allowance for Ireland subsidiary was released based on the profitability analysis of the cumulative 12-quarter actual period and the projection for the next 3-year period. As of December 31, 2020, the net operating loss carryforwards for federal and state income tax purposes were approximately $21.7 million and $53.0 million, respectively. The state net operating losses begin to expire in 2029. The federal net operating losses for tax years after 2017 can be carried forward indefinitely. As of December 31, 2020, we had federal and state tax credit carryforwards of approximately $6.4 million and $2.6 million, respectively, available to offset future tax liabilities. The federal credit carryforwards will expire between 2020 and 2039 and the California tax credits will carryforward indefinitely. In addition, as of December 31, 2020, we have Canadian research and development credit carryforwards of $1.7 million, which will expire at various dates through 2040. These operating losses and credit carryforwards have not been reviewed by the relevant tax authorities and could be subject to adjustment upon examinations. Section 382 of the Internal Revenue Code (“IRC Section 382”) imposes limitations on a corporation’s ability to utilize its net operating losses and credit carryforwards if it experiences an “ownership change” as defined by IRC Section 382. Utilization of a portion of our federal net operating loss carryforward was limited in accordance with IRC Section 382, due to an ownership change that occurred during 1999. This limitation has fully lapsed as of December 31, 2010. As of December 31, 2020, we conducted an IRC Section 382 analysis with respect to our net operating loss and credit carryforwards and determined there was no limitation. There can be no assurance that future issuances of our securities will not trigger limitations under IRC Section 382 which could limit utilization of these tax attributes. The reconciliation between the effective federal statutory rate and our effective tax rates are as follows: For the Year Ended 2020 2019 Federal statutory rate 21.0 % 21.0 % Foreign withholding 2.0 % (0.3) % Stock-based compensation expense 12.9 % (11.3) % Foreign rate differential (33.0) % (2.6) % Prior year true-up items 1.1 % 0.2 % Tax reserves (4.0) % (2.1) % Other 0.1 % (1.3) % FTC conversion true up (10.3) % (5.9) % State taxes, net of federal benefit 0.1 % — % Global intangible low-taxed income 21.0 % — % Nondeductible officers compensation 3.5 % (0.2) % Irish corporation restructure (169.2) % — % Valuation allowance 83.8 % 0.1 % Effective tax rate (71.0) % (2.4) % Undistributed earnings of our foreign subsidiaries are considered to be indefinitely reinvested and accordingly, no provision for applicable income taxes has been provided thereon. Upon distribution of those earnings, we are subject to withholding taxes payable to various foreign countries. As of December 31, 2020, any foreign withholding taxes on the undistributed earnings of our foreign subsidiaries were immaterial. We maintain liabilities for uncertain tax positions. These liabilities involve considerable judgment and estimation and are continuously monitored by management based on the best information available, including changes in tax regulations, the outcome of relevant court cases, and other information. A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows (in thousands): For the Year Ended 2020 2019 Balance at beginning of year $ 4,826 $ 4,611 Gross increases for tax positions of prior years — 394 Gross increases for tax positions of current year 10 34 Lapse of statute of limitations (311) (213) Balance at end of year $ 4,525 $ 4,826 The unrecognized tax benefits relate primarily to federal and state research and development credits and intercompany profit on the transfer of certain IP rights to one of our foreign subsidiaries as part of our tax reorganization completed in 2015. We account for interest and penalties related to uncertain tax positions as a component of income tax expense. As of December 31, 2020, we accrued no interest or penalties related to uncertain tax positions. As of December 31, 2020, we had no unrecognized tax benefits that would affect our effective tax rate. Because we have net operating loss and credit carryforwards, there are open statutes of limitations in which federal, state and foreign taxing authorities may examine our tax returns for all years from 2001 through the current period.

NET INCOME (LOSS) PER SHARE

NET INCOME (LOSS) PER SHARE	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
NET INCOME (LOSS) PER SHARE	NET INCOME (LOSS) PER SHARE Basic net income (loss) per share is computed using the weighted average number of shares of common stock outstanding during the period. Diluted net income (loss) per share is computed using the weighted average number of shares of common stock, adjusted for any dilutive effect of potential common stock. Potential common stock, computed using the treasury stock method, includes stock options, stock awards and ESPP. The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income (loss) per share (in thousands, except per share amounts): For the Year Ended 2020 2019 Numerator: Net income (loss) $ 5,401 $ (20,044) Denominator: Weighted-average common stock outstanding, basic 28,117 31,529 Dilutive potential common shares: Stock options, stock awards and ESPP 360 — Total shares, diluted 28,477 31,529 Basic net income (loss) per share $ 0.19 $ (0.64) Diluted net income (loss) per share $ 0.19 $ (0.64) We include the underlying market condition stock awards in the calculation of diluted earnings per share if the performance condition has been satisfied as of the end of the reporting period and exclude stock equity awards if the performance condition has not been met. For the years ended December 31, 2020 and 2019, we had stock options, RSUs and RSAs outstanding that could potentially dilute basic earnings per share in the future, but these were excluded from the computation of diluted net income (loss) per share because their effect would have been anti-dilutive. These outstanding securities consisted of the following (in thousands): For the Year Ended 2020 2019 Stock options 1,236 967 Stock awards — 1,036 1,236 2,003

LEASES

LEASES	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
LEASES	LEASES We adopted ASC 842, Leases, on January 1, 2019. We lease all of our office space pursuant to operating lease and sublease arrangements, which expire at various dates through February 29, 2024. We recognize lease expense on a straight-line basis over the lease term. Leases with an initial term of 12 months or less are not recorded on the Consolidated Balance Sheets. We combine lease and non-lease components for new and reassessed leases. We apply discount rates to operating leases using a portfolio approach. Below is a summary of our ROU assets and lease liabilities as of December 31, 2020 and 2019, respectively (in thousands): December 31, Balance Sheets Classification 2020 2019 Assets Right-of-use assets Other assets $ 1,607 $ 2,202 Liabilities Operating lease liabilities - current Other current liabilities 1,382 1,150 Operating lease liabilities - long-term Other long-term liabilities 1,677 2,664 Total lease liabilities $ 3,059 $ 3,814 The table below provides supplemental information related to operating leases during the years ended December 31, 2020 and 2019 (in thousands except for lease term): For the Year Ended 2020 2019 Cash paid within operating cash flow $ 1,431 $ 1,178 Weighted average lease terms (in years) 2.25 3.35 Weighted average discount rates 3.50 % 3.25 % On January 31, 2020, we entered into an agreement to lease approximately 5,000 square feet of office space in San Francisco, California (“SF Facility”). This facility is used for administrative functions. The lease commenced in the first quarter of 2020 and expires in 2022. In the first quarter of 2020, we recorded a lease liability of $0.6 million, which represents the present value of the lease payments using an estimated incremental borrowing rate of 3.50%. We also recognized lease right-of-use assets (“ROU”) of $0.6 million which represents our right to use an underlying asset for the lease term. Operating lease ROU assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As a result of COVID-19, we implemented work-from-home policy in the first quarter of 2020. Our San Francisco office has been closed since the first quarter of 2020 and we expect our San Francisco-based employees to continue to work-from-home in the foreseeable future. We have been actively seeking a sublease tenant for the SF Facility. In the fourth quarter of 2020, we recorded $0.3 million impairment charge to the SF Facility ROU asset. On November 12, 2014, we entered into an amendment to the lease of approximately 42,000 square feet office space in San Jose, California facilities (“SJ Facility”). The lease commenced in May 2015 and expires as of April 2023. During 2019, we began to shift general and administrative, research and development and executive functions and employees from the SJ Facility to our San Francisco, California and Montreal, Canada offices. In the fourth quarter of 2019, we announced our decision to exit the SJ Facility by March 31, 2020. We accelerated the amortization of our SJ Facility leasehold improvements over their remaining estimated life. The SJ Facility leasehold improvements were fully amortized by March 31, 2020. In the fourth quarter of 2019, we recorded a $0.9 million impairment charge to the SJ Facility ROU asset. On March 12, 2020, we entered into a sublease agreement with Neato Robotics, Inc. (“Neato”) for the SJ Facility. This sublease commenced in June 2020 and ends on April 30, 2023 which is the lease termination date of the original SJ Facility lease. In accordance with provisions of ASC 842 Leases (“ASC 842”), we treated the sublease as a separate lease as we were not relieved of the primary obligation under the original lease. We continue to account for the original SJ Facility, as a lessee, in the same manner as prior to the commencement date of the sublease. We accounted for the sublease as a lessor of the lease. We classified the sublease as an operating lease as it did not meet the criteria of a Sale-Type or Direct Financing lease. At the commencement date of the sublease, we recognized initial direct costs of $0.3 million. These deferred costs will be amortized over the term of the sublease payments. As of December 31, 2020, $0.1 million was recorded in Prepaid expenses and other current assets and $0.1 million was recorded in Other assets on our Consolidated Balance Sheets. We recognize operating lease expense and lease payments from the sublease, on a straight-line basis, in our Consolidated Statements of Operations and Comprehensive Income (Loss) over the lease terms. During the years ended December 31, 2020 and 2019, our net operating lease expenses are as follows (in thousands): For the Year Ended 2020 2019 Operating lease cost $ 1,139 $ 1,120 Sublease income (585) — Total lease cost $ 554 $ 1,120 Minimum future lease payments obligations as of December 31, 2020 are as follows (in thousands): For the Years Ending December 31, 2021 $ 1,510 2022 1,231 2023 460 2024 25 Total $ 3,226 Future lease payments from our sublease agreement as of December 31, 2020 are as follows (in thousands): For the Years Ending December 31, 2021 $ 1,046 2022 1,077 2023 351 Total $ 2,474

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
EMPLOYEE BENEFIT PLAN	EMPLOYEE BENEFITS We have a 401(k) tax-deferred savings plan under which eligible employees may elect to have a portion of their salary deferred and contributed to the 401(k) plan. Employees’ contributions may be matched at our discretion. In 2019, we matched 50% of the employees’ contribution up to $4,000. In the first quarter of 2020, as one of the COVID-19 related cost cutting initiatives, we temporarily suspended the 401 (k) match. A summary of 401(k) contribution for the years ended December 31, 2020 and 2019 are as follows (in thousands): For the Year Ended 2020 2019 Contribution to 401(k) plan $ 48 $ 125 In 2020, in conjunction with the transition of certain research and development and administration functions from San Jose, California to Montreal, Canada, we recorded a $0.5 million one-time charge for termination benefits for the employees impacted by this transition. We paid all the termination benefits during 2020. As of December 31, 2020, we have no accrued termination benefits.

SEGMENT REPORTING, GEOGRAPHIC I

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS	SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS Revenue by Market Area The following is a summary of revenues by market areas. Revenue as a percentage of total revenues by market are as follows: For the Year Ended 2020 2019 Mobile, Wearables, and Consumer 69 % 63 % Gaming Devices 15 % 16 % Automotive 15 % 21 % Other 1 % — % Total 100 % 100 % Geographic Revenue Revenues are broken out geographically by the location of the customer. A summary of revenue by region as a percentage of total revenues are as follows: For the Year Ended 2020 2019 Asia 76 % 65 % North America 16 % 28 % Europe 8 % 7 % Total 100 % 100 % A summary of revenue by country as a percentage of total revenues are as follows: For the Year Ended 2020 2019 Korea 49 % 45 % Japan 18 % 17 % United States of America 16 % 28 % Other countries with less than 10% in a year 17 % 10 % Total 100 % 100 % Property and Equipment, net by Country Property and equipment, net by geographic areas as a percentage of total property and equipment, net are as follows: December 31, 2020 2019 Canada 68 % 15 % United States of America 32 % 85 % Total 100 % 100 % Significant Customers During the years ended December 31, 2020 and 2019, one customer accounted for 40% and 27% of our total revenue, respectively. A summary of customers with 10% or greater of our outstanding accounts and other receivables are as follows: December 31, 2020 2019 Customer A 39% 22% Customer B 33% * Customer C 15% * Customer D 10% * * Represents less than 10% of our total accounts and other receivables.

Related Party Transaction

Related Party Transaction	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transaction	Related Party TransactionDuring 2020, we paid $0.2 million to Viex Capital Advisors, LLC ("Viex") as reimbursement of fees and expenses incurred in connection with the nomination of candidates for membership on the Board, the preparation of proxy materials and other communications, as well as fees and expenses related to a signed letter of agreement at which time Viex owned more than 5% of our common stock. In March 2020, the managing member of Viex joined our Board of Directors.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Event On February 3, 2021, we filed a universal shelf registration statement on Form S-3 with the Securities and Exchange Commission which became effective on February 9, 2021. The shelf registration statement is intended to provide us with financial flexibility to raise capital from the offering of up to $250 million of common stock, preferred stock, warrants, depository shares, units and/or debt securities, conducted in one or multiple offerings while the shelf registration statement is effective. We intend to use the net proceeds from the sale of the securities offered by this prospectus for general corporate purposes. On February 11, 2021, we entered into an equity distribution agreement ("Distribution Agreement") with an investment banking firm to issue and sell shares up to $50 million in aggregated offering price of our common stock. In accordance with the terms of the Distribution Agreement, we will pay 2.25% commission on the gross sales proceeds from common stock sold, and we will also provide customary indemnification rights and reimburse legal fees and disbursements. The Distribution Agreement may be terminated by either party upon prior written notice to the other party, or at any time under certain circumstances. We are not obligated to sell any shares under the Distribution Agreement. As of March 3, 2021, we sold 3.3 million shares of our common stock and we received net proceeds of approximately $36.3 million from the offering after deducting commissions and other estimated offering expense.

SIGNIFICANT ACCOUNTING POLICI_2

SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation The accompanying consolidated financial statements include the accounts of Immersion Corporation and our wholly-owned subsidiaries. All intercompany accounts, transactions, and balances have been eliminated in consolidation.
Use of Estimates	The preparation of consolidated financial statements and related disclosures in accordance with U.S. GAAP (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results may differ materially from those estimates which were made based on the best information known to management at that time. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, useful lives of property and equipment, valuation of income taxes including uncertain tax provisions, stock-based compensation and income taxes. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Foreign Currency Translation	Foreign Currency Translation The functional currency of our foreign subsidiaries is U.S. dollars. Accordingly, gains and losses from the remeasurement financial statements of the foreign subsidiaries into the U.S. dollars and from foreign currency transaction are included in our Consolidated Statements of Operations and Other Comprehensive Income (Loss).
Cash Equivalents	Cash Equivalents We consider all highly liquid instruments with an original or remaining maturity of 90 days or less at the date of purchase to be cash equivalents.
Short-term Investments	Our short-term investments consist of U.S treasury bills with an original or remaining maturity of greater than 90 days on the date of purchase. These investments are classified as available-for-sale and carried at fair market value. Even though the stated maturity dates of these debt securities may be one year or more beyond the balance sheet date, we classified all debt securities as short-term investments as they are reasonably expected to be realized in cash or sold within one year. Unrealized gains or losses on such securities are included in accumulated other comprehensive income (loss) in stockholders’ equity. Realized gains and losses from maturities of all such securities are reported in earnings and computed using the specific identification cost method. Realized gains or losses and charges for other-than-temporary declines in value, if any, on available-for-sale securities are reported in other income (expense), net, as incurred. We periodically evaluate these investments for other-than-temporary impairment.
Fair Value of Financial Instruments	Financial instruments consist primarily of cash equivalents, short-term investments, accounts receivable and accounts payable. Cash equivalents and short-term investments are stated at fair value based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. The recorded cost of accounts receivable and accounts payable approximate the fair value of the respective assets and liabilities.
Property and Equipment	Property and equipment are stated at cost and is depreciated using the straight-line method over the estimated useful life of the related asset.Leasehold improvements are amortized over the shorter of the lease term or their estimated useful life.
Long-lived Assets	Long-lived AssetsWe evaluate our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of that asset may not be recoverable. An impairment loss would be recognized when the sum of the undiscounted future net cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount. Measurement of an impairment loss for long-lived assets and certain identifiable intangible assets that management expects to hold and use is based on the fair value of the asset.
Leases	Leases We lease our office space under lease arrangements with expiration dates on or before February 29, 2024. We determine if an arrangement is a lease at inception under ASC 842 Leases. Our operating leases are accounted for as right-of-use (“ROU”) assets and lease liability obligations in our Consolidated Balance Sheets under Other assets , net, Other current liabilities and Other long-term liabilities , respectively. ROU assets represent our right to use an underlying asset for the lease term, and lease liability represent our obligation to make lease payments arising from the lease arrangements. ROU assets and lease liabilities are recognized at lease commencement date based on the present value of lease payments over the lease term. We elect to
Revenue Recognition and Deferred Revenue	revenue is primarily derived from fixed fee license agreements and per-unit royalty agreements, along with less significant revenue earned from development, services and other revenue. Fixed fee license revenue We recognize revenue from a fixed fee license agreement when our performance obligation has been satisfied, which typically occurs upon the transfer of rights to our technology upon the execution of the license agreement. In certain contracts, we grant a license to our existing patent portfolio at the inception of the license agreement as well as rights to the portfolio as it evolves throughout the contract term. For such arrangements, we have two separate performance obligations: • Performance Obligation A: Transfer of rights to our patent portfolio as it exists when the contract is executed; • Performance Obligation B: Transfer of rights to our patent portfolio as it evolves over the term of the contract, including access to new patent applications that the licensee can benefit from over the term of the contract. If a fixed fee license agreement contains only Performance Obligation A, we will recognize most or all of the revenue from the agreement at the inception of the contract. For fixed fee license agreements that contain both Performance Obligation A and B, we will allocate the transaction price based on the standalone price for each of the two performance obligations. We use a number of factors primarily related to the attributes of our patent portfolio to estimate standalone prices related to Performance Obligation A and B. Once the transaction price is allocated, the portion of the transaction price allocable to Performance Obligation A will be recognized in the quarter the license agreement is signed and the customer can benefit from rights provided in the contract, and the portion allocable to Performance Obligation B will be recognized on a straight-line basis over the contract term. For such contracts, a contract liability account will be established and included within Deferred revenue and Long-term deferred revenue on the Consolidated Balance Sheets. As the rights and obligations in a contract are interdependent, contract assets and contract liabilities that arise in the same contract are presented on a net basis. Some of our license agreements contain fixed fees related to past infringements. Such fixed fees are recognized as revenue or recorded as a deduction to our operating expense in the quarter the license agreement is signed. Payments for fixed fee license contracts typically are due in full within 30 - 45 days from execution of the contract. From time to time, we enter into a fixed fee license contract with payments due in a number of installments payable throughout the contract term. In such cases, we determine if a significant financing component exists and if it does, we will recognize more or less revenue and corresponding interest expense or income, as appropriate. Per-unit Royalty revenue We record per-unit royalty revenue in the same period in which the licensee’s underlying sales occur. As we generally do not receive the per-unit licensee royalty reports for sales during a given quarter within the time frame that allows us to adequately review the reports and include the actual amounts in our quarterly results for such quarter, we accrue the related revenue based on estimates of our licensees’ underlying sales, subject to certain constraints on our ability to estimate such amounts. We develop such estimates based on a combination of available data including, but not limited to, approved customer forecasts, a lookback at historical royalty reporting for each of our customers, and industry information available for the licensed products. As a result of accruing per-unit royalty revenue for the quarter based on such estimates, adjustments will be required in the following quarter to true up revenue to the actual amounts reported by its licensees. We recorded $0.1 million and $20,000 adjustments to decrease royalty revenue during the three months ended March 31, and June 30, 2020, respectively. We recorded $0.3 million and $0.6 million adjustments to increase royalty revenue during the three months ended September 30, and December 31, 2020, respectively. During the three months ended December 31, 2019 and September 30, 2019, we recorded $0.2 million and $0.1 million adjustments to decrease royalty revenue, respectively. During the three months ended June 30 and March 31, 2019, we recorded adjustments to increase royalty revenue by $0.2 million and $0.1 million, respectively. These adjustments represent the difference between the estimated per-unit royalty revenue we reported during the quarter and actual per-unit royalty revenue reported by our licensees after the quarterly reporting. Certain of our per-unit royalty agreements contain minimum royalty provisions which sets forth minimum amounts to be received by us during the contract term. Under Accounting Standard Codification 606, Revenue from Contracts with Customers , (“ASC 606”), minimum royalties are considered a fixed transaction price to which we have an unconditional right once all other performance obligations, if any, are satisfied. We recognize all minimum royalties as revenue at the inception of the license agreement, or in the period in which all remaining revenue recognition criteria have been met. We account for the unbilled minimum royalties as contract assets as Prepaid and other current assets and Other assets, net on our Consolidated Balance Sheets, and the balance of such contract assets will be reduced by the actual royalties to be reported by the licensee during the contract term until fully utilized, after which point any excess per-unit royalties reported are recognized as revenue. As the rights and obligations in a contract are interdependent, contract assets and contract liabilities that arise in the same contract are presented on a net basis. Payments of per-unit royalties typically are due within 30 to 60 days from the end of the quarter in which the underlying sales took place. Development, services, and other revenue As the performance obligation related to our development, service and other revenue is satisfied over a period of time, we recognize such revenue evenly over the period of performance obligations, which is generally consistent with the contractual term. Deferred revenue consists of amounts that have been invoiced or paid, but have not been recognized as revenue. The amounts are primarily derived from our fixed license fee agreements under which we are obliged to transfer both rights to our patent portfolio that exists when the contract is executed and rights to its patent portfolio as it evolves over the contract term. Deferred revenue that will be recognizable during the succeeding 12-month period is recorded as Deferred Revenu e, and the remaining deferred revenue is recorded as Long-term deferred revenue on the Consolidated Balance Sheets. Capitalized Contract Costs
Advertising	Advertising costs (including obligations under cooperative marketing programs) are expensed as incurred and included in Sales and Marketing expense on Consolidated Statement of Operations and Comprehensive Income (Loss).
Research and Development	Research and DevelopmentResearch and development expenses primarily consisted of personnel-related costs, including payroll and stock-based compensation, outside consulting expenses and allocations of corporate overhead expenses. Research and development costs are expensed as incurred.
Income Taxes	Income Taxes We use the asset and liability method of accounting for income taxes. Under this method, income tax expense is recognized for the amount of taxes payable or refundable for the current year. In addition, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities, and for operating losses and tax credit carryforwards. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized and are reversed at such time that realization is believed to be more likely than not.
Software Development Costs	Costs for the development of new software products and substantial enhancements to existing software products associated with the development of products for sale are expensed to research and development expense until technological feasibility has been established, at which time any additional costs would be capitalized. We consider technological feasibility to be established upon completion of a working model of the software. Because we believe our current process for developing software is essentially completed concurrently with the establishment of technological feasibility, no costs have been capitalized to date.
Concentration of Credit Risks	Financial instruments that potentially subject to a concentration of credit risk principally consist of cash, cash equivalents, short term investments, and accounts receivable. We are also subject to a concentration of revenues given certain key licensees that contributed a significant portion of our total revenue. See Note 12. Segment Reporting, Geographic Information and Significant Customers of the Notes to Consolidated Financial Statements for more details on customer revenue concentration.
Certain Significant Risks and Uncertainties	We operate in multiple industries and our operations can be affected by a variety of factors. For example, management believes that changes in any of the following areas could have a negative effect on our future financial position and results of operations: the mix of revenues; the loss of significant customers; fundamental changes in the technologies and our licensees’ products; market acceptance of our and our licensees’ products under development; development of sales channels; litigation or other claims in which we are involved; the ability to successfully assert its patent rights against others; the impact of changing economic conditions; the hiring, training, and retention of key employees; successful and timely completion of product and technology development efforts; and new product or technology introductions by competitors.
Recently Adopted Accounting Pronouncements and Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). This guidance requires financial assets measured at amortized cost to be presented at the net amount expected to be collected based on historical events, current conditions and forecast information. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2019 and early adoption is permitted. We adopted ASU 2016-13 as of January 1, 2020. The adoption of this new accounting standard did not have a material impact on our consolidated financial statements. In December 2019, the FASB issued Accounting Standard Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (ASU 2019-12), which enhances and simplifies various aspects of the income tax accounting guidance, including requirements such as tax basis step-up in goodwill obtained in a transaction that is not a business combination, ownership changes in investments, and interim-period accounting for enacted changes in tax law. The amendment is effective for public companies with fiscal years beginning after December 15, 2020; early adoption is permitted. We adopted ASU 2019-12 as of January 1, 2021. The adoption of this new accounting standard did not have a material impact on our consolidated financial statements.
Fair Value	Our fixed income available-for-sale securities consist of high quality, investment grade securities. We value these securities based on pricing from pricing vendors, who may use quoted prices in active markets for identical assets (Level 1) or inputs other than quoted prices that are observable either directly or indirectly (Level 2) in determining fair value. Financial instruments are valued based on quoted market prices in active markets include mostly money market securities. Such instruments are generally classified within Level 1 of the fair value hierarchy. Instruments based on quoted prices in markets that are less active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency are generally classified within Level 2 of the fair value hierarchy and include U.S. treasury securities. Instruments valued based on unobservable inputs which reflect the reporting entity’s own assumptions or data that market participants would use in valuing an instrument are generally classified within Level 3 of the fair value hierarchy. As of December 31, 2020, and 2019, we did not hold any Level 3 instruments.
Segment Reporting, Policy	Segment Information We develop, license, and support a wide range of software and IP that more fully engage users’ senses of touch when operating digital devices. We focus on the following target application areas: mobile devices, wearables, consumer, mobile entertainment and other content; console gaming; automotive; medical; and commercial. We manage these application areas in one operating and reporting segment with only one set of management, development, and administrative personnel.
Compensation Related Costs, Policy	Stock-based CompensationWe recognize stock-based compensation cost for shares, net of estimated forfeiture over the requisite service period of the award, which is the vesting period. We use the Black-Scholes Merton option pricing model to determine the fair value of stock options and employee stock purchase plan shares. We estimate the fair value of market-performance based stock options and restricted stock units using a Monte Carlo simulation model which requires the input of assumptions, including expected term, stock price volatility and the risk-free rate of return. In addition, judgment is also required in estimating the number of stock-based awards that are expected to be forfeited. Forfeitures are estimated based on historical experience at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.

SIGNIFICANT ACCOUNTING POLICI_3

SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Estimated useful lives of property and equipment	The estimated useful lives are typically as follows: Computer equipment and purchased software 3 years Machinery and equipment 3-5 years Furniture and fixtures 5 years Property and equipment, net are as follows (in thousands): December 31, 2020 2019 Computer equipment and purchased software $ 2,548 $ 3,011 Machinery and equipment 423 699 Furniture and fixtures 1,104 1,115 Leasehold improvements 1 3,892 3,897 Total 7,967 8,722 Less accumulated depreciation and amortization 1 (7,758) (7,496) Property and equipment, net $ 209 $ 1,226
Advertising expense	Advertising expense was as follows (in thousands): Year ended December 31, 2020 2019 Advertising expense $ 180 $ 173

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregated revenue	The following table presents the disaggregation of our revenue for the years ended December 31, 2020 and 2019 (in thousands): Years Ended December 31, 2020 2019 Fixed fee license revenue $ 5,472 $ 12,627 Per-Unit royalty revenue 24,704 23,016 Total royalty and license revenue 30,176 35,643 Development, services, and other 280 310 Total revenues $ 30,456 $ 35,953

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of financial instruments measured at fair value on recurring basis	Financial instruments measured at fair value on a recurring basis as of December 31, 2020 and December 31, 2019 are classified based on the fair value hierarchy in the table below (in thousands): December 31, 2020 Total Fair Value Measurements Using Quoted Prices Significant Significant Assets: Money market accounts $ 45,614 $ — $ — $ 45,614 Total assets at fair value 1 $ 45,614 $ — $ — $ 45,614 (1) The above table excludes $13.9 million of cash held in banks. December 31, 2019 Total Fair Value Measurements Using Quoted Prices Significant Significant Assets: Money market accounts $ 63,351 $ — $ — $ 63,351 U.S. Treasury securities — 3,019 — 3,019 Total assets at fair value 2 $ 63,351 $ 3,019 $ — $ 66,370 (2) The above table excludes $23.1 million of cash held in banks as of December 31, 2019.
Schedule of short-term investments	Short-term investments as of December 31, 2019 consisted of the following (in thousands): December 31, 2019 Amortized Gross Gross Fair U.S. Treasury securities $ 3,018 $ 1 $ — $ 3,019 Total $ 3,018 $ 1 $ — $ 3,019

BALANCE SHEET DETAILS (Tables)

BALANCE SHEET DETAILS (Tables)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of cash and cash equivalents	December 31, 2020 2019 Cash $ 13,908 $ 23,127 Money market funds 45,614 63,351 Cash and cash equivalents $ 59,522 $ 86,478
Schedule of accounts and other receivables	Accounts and other receivables were as follows (in thousands): December 31, 2020 2019 Trade accounts receivable $ 1,618 $ 2,972 Other receivables 600 413 Accounts and other receivables $ 2,218 $ 3,385
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets were as follows (in thousands) December 31, 2020 2019 Prepaid expenses $ 816 $ 933 Contract assets - current 11,623 13,128 Other current assets 171 17 $ 12,610 $ 14,078
Schedule of property and equipment	The estimated useful lives are typically as follows: Computer equipment and purchased software 3 years Machinery and equipment 3-5 years Furniture and fixtures 5 years Property and equipment, net are as follows (in thousands): December 31, 2020 2019 Computer equipment and purchased software $ 2,548 $ 3,011 Machinery and equipment 423 699 Furniture and fixtures 1,104 1,115 Leasehold improvements 1 3,892 3,897 Total 7,967 8,722 Less accumulated depreciation and amortization 1 (7,758) (7,496) Property and equipment, net $ 209 $ 1,226
Schedule of other assets, net	Other assets, net are as follows (in thousands): December 31, 2020 2019 Contract assets - Long-term $ 4,596 $ 6,928 Lease right-of-use assets 1,607 2,202 Deferred tax assets 2,659 470 Other assets 138 — Total other assets, net $ 9,000 $ 9,600
Schedule of other current assets	Other current liabilities are as follows (in thousands): December 31, 2020 2019 Accrued legal $ 202 $ 1,077 Lease liabilities - current 1,382 1,150 Other current liabilities 873 1,251 Total other current liabilities $ 2,457 $ 3,478

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Summary of equity incentive program	A summary of our equity incentive program is as follows (in thousands): December 31, 2020 Common stock shares available for grant 3,254 Stock options outstanding 828 RSAs outstanding 130 RSUs outstanding 802 PSUs outstanding 250
Summary of time-based stock options	The following summarizes activities for the time-based stock options for the year ended December 31, 2020: Number of Shares Weighted Average Weighted Average Aggregate Outstanding at December 31, 2019 967 $ 8.55 5.63 $ 16 Granted 456 7.58 Exercised (76) 7.62 Canceled or expired (519) 8.46 Outstanding as of December 31, 2020 828 $ 8.16 4.36 $ 2,628 Vested and expected to vest at December 31, 2020 734 $ 8.24 4.20 $ 2,273 Exercisable at December 31, 2020 362 $ 8.26 2.71 $ 887
Summary of restricted stock units activities	The following summarizes RSUs activities for the year ended December 31, 2020: Number of Restricted Stock Unis Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Life (Years) Aggregate Outstanding at December 31, 2019 945 $ 8.81 1.25 $ 7,020 Granted 515 5.95 Released (367) 9.01 Forfeited (291) 8.53 Outstanding at December 31, 2020 802 $ 6.98 1.00 $ 9,057
Summary of restricted stock awards activities	The following summarizes RSA activities for the year ended December 31, 2020: Number of Restricted Stock Awards (in thousands) Weighted Average Grant Date Fair Value Weighted Average Remaining Recognition Period Outstanding at December 31, 2019 91 $ 7.45 0.45 Granted 142 6.43 Released (71) 7.18 Forfeited (32) 7.27 Outstanding at December 31, 2020 130 $ 6.53 0.45
Summary of stock-based compensation expenses	The stock-based compensation related to all of our stock-based awards and ESPP for the years ended December 31, 2020 and 2019 is as follows (in thousands): For the Years Ended 2020 2019 Stock options $ 1,062 $ 701 RSUs, RSAs and PSUs 3,638 4,692 ESPP 56 71 Total $ 4,756 $ 5,464 Sales and marketing $ 846 $ 947 Research and development 870 1,304 General and administrative 3,040 3,213 Total $ 4,756 $ 5,464
Summary of assumptions used to value option grants	The assumptions used to value options granted under our equity incentive program are as follows: Time-based stock options: For the Year Ended 2020 2019 Expected life (in years) 4.2 4.4 Volatility 52% 55% Interest rate 1.0% 2.0% Dividend yield — — Market condition based restricted stock units: For the Year Ended 2020 2019 1 Expected life (in years) 1.2 N/A Volatility 52% N/A Interest rate 1.0% N/A Dividend yield — N/A (1) No market condition based restricted stock units were granted during the year ended December 31, 2019.

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of income tax provisions	Income tax benefit from (provisions for) the years ended December 31, 2020 and 2019 consisted of the following (in thousands): For the Year Ended 2020 2019 Income (loss) before provision for income taxes $ 3,159 $ (19,573) Benefit from (provision for) income taxes 2,242 (471) Effective tax rate (71.0) % (2.4) %
Schedule of pre-tax book income or loss from continuing operations	The components of our income (loss) before benefit from (provision for) income taxes were as follows (in thousands): For the Year Ended 2020 2019 Domestic $ (4,602) $ (17,970) Foreign 7,761 (1,603) Total $ 3,159 $ (19,573)
Schedule of provisions for income taxes	The benefit from (provisions for) income taxes consisted of the following (in thousands): For the Year Ended 2020 2019 Current: U.S, federal — $ — States and local (3) (3) Foreign (114) (190) Total current $ (117) $ (193) Deferred: U.S, federal — — States and local — — Foreign 2,359 (278) Total deferred 2,359 (278) Total benefit from (provision for) income taxes $ 2,242 $ (471)
Details of significant components of net deferred tax assets and liabilities	Deferred tax assets and liabilities are recognized for the temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, tax losses, and credit carryforwards. Significant components of the net deferred tax assets and liabilities consisted of (in thousands); December 31, 2020 2019 Deferred tax assets: Net operating loss carryforwards $ 9,239 $ 4,936 State income taxes 1 1 Deferred revenue 5,426 6,291 Research and development and other credits 8,638 8,282 Reserve and accruals recognized in different periods 1,027 1,128 Capitalized research and development expenses 3,318 3,447 Depreciation and amortization 3,134 3,636 Lease liability 351 806 Total deferred tax assets 31,134 28,527 Valuation allowance (28,475) (28,057) Net deferred tax assets 2,659 470 Deferred tax liabilities: Right of use lease assets (344) (466) Foreign credits (14) (23) Other deferred tax liabilities — (40) Total deferred tax liabilities (358) (529) Net deferred taxes $ 2,301 $ (59)
Reconciliation between provision for income taxes at statutory rate and effective tax rate	reconciliation between the effective federal statutory rate and our effective tax rates are as follows: For the Year Ended 2020 2019 Federal statutory rate 21.0 % 21.0 % Foreign withholding 2.0 % (0.3) % Stock-based compensation expense 12.9 % (11.3) % Foreign rate differential (33.0) % (2.6) % Prior year true-up items 1.1 % 0.2 % Tax reserves (4.0) % (2.1) % Other 0.1 % (1.3) % FTC conversion true up (10.3) % (5.9) % State taxes, net of federal benefit 0.1 % — % Global intangible low-taxed income 21.0 % — % Nondeductible officers compensation 3.5 % (0.2) % Irish corporation restructure (169.2) % — % Valuation allowance 83.8 % 0.1 % Effective tax rate (71.0) % (2.4) %
Reconciliation of beginning and ending amount of gross unrecognized tax benefits	A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows (in thousands): For the Year Ended 2020 2019 Balance at beginning of year $ 4,826 $ 4,611 Gross increases for tax positions of prior years — 394 Gross increases for tax positions of current year 10 34 Lapse of statute of limitations (311) (213) Balance at end of year $ 4,525 $ 4,826

NET INCOME (LOSS) PER SHARE (Ta

NET INCOME (LOSS) PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Reconciliation used in computing basic and diluted net income per share	For the Year Ended 2020 2019 Numerator: Net income (loss) $ 5,401 $ (20,044) Denominator: Weighted-average common stock outstanding, basic 28,117 31,529 Dilutive potential common shares: Stock options, stock awards and ESPP 360 — Total shares, diluted 28,477 31,529 Basic net income (loss) per share $ 0.19 $ (0.64) Diluted net income (loss) per share $ 0.19 $ (0.64)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	These outstanding securities consisted of the following (in thousands): For the Year Ended 2020 2019 Stock options 1,236 967 Stock awards — 1,036 1,236 2,003

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Summary of ROU assets and lease liabilities	Below is a summary of our ROU assets and lease liabilities as of December 31, 2020 and 2019, respectively (in thousands): December 31, Balance Sheets Classification 2020 2019 Assets Right-of-use assets Other assets $ 1,607 $ 2,202 Liabilities Operating lease liabilities - current Other current liabilities 1,382 1,150 Operating lease liabilities - long-term Other long-term liabilities 1,677 2,664 Total lease liabilities $ 3,059 $ 3,814
Schedule of supplemental information related to operating leases and expenses	The table below provides supplemental information related to operating leases during the years ended December 31, 2020 and 2019 (in thousands except for lease term): For the Year Ended 2020 2019 Cash paid within operating cash flow $ 1,431 $ 1,178 Weighted average lease terms (in years) 2.25 3.35 Weighted average discount rates 3.50 % 3.25 % For the Year Ended 2020 2019 Operating lease cost $ 1,139 $ 1,120 Sublease income (585) — Total lease cost $ 554 $ 1,120
Schedule of minimum future lease payment obligations	Minimum future lease payments obligations as of December 31, 2020 are as follows (in thousands): For the Years Ending December 31, 2021 $ 1,510 2022 1,231 2023 460 2024 25 Total $ 3,226
Schedule of Future Minimum Rental Payments for Operating Leases	Future lease payments from our sublease agreement as of December 31, 2020 are as follows (in thousands): For the Years Ending December 31, 2021 $ 1,046 2022 1,077 2023 351 Total $ 2,474

EMPLOYEE BENEFITS (Tables)

EMPLOYEE BENEFITS (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Details of company contribution to plan	In 2019, we matched 50% of the employees’ contribution up to $4,000. In the first quarter of 2020, as one of the COVID-19 related cost cutting initiatives, we temporarily suspended the 401 (k) match. A summary of 401(k) contribution for the years ended December 31, 2020 and 2019 are as follows (in thousands): For the Year Ended 2020 2019 Contribution to 401(k) plan $ 48 $ 125

SEGMENT REPORTING, GEOGRAPHIC_2

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedules of concentration risk	The following is a summary of revenues by market areas. Revenue as a percentage of total revenues by market are as follows: For the Year Ended 2020 2019 Mobile, Wearables, and Consumer 69 % 63 % Gaming Devices 15 % 16 % Automotive 15 % 21 % Other 1 % — % Total 100 % 100 % For the Year Ended 2020 2019 Asia 76 % 65 % North America 16 % 28 % Europe 8 % 7 % Total 100 % 100 % A summary of revenue by country as a percentage of total revenues are as follows: For the Year Ended 2020 2019 Korea 49 % 45 % Japan 18 % 17 % United States of America 16 % 28 % Other countries with less than 10% in a year 17 % 10 % Total 100 % 100 % Property and equipment, net by geographic areas as a percentage of total property and equipment, net are as follows: December 31, 2020 2019 Canada 68 % 15 % United States of America 32 % 85 % Total 100 % 100 % A summary of customers with 10% or greater of our outstanding accounts and other receivables are as follows: December 31, 2020 2019 Customer A 39% 22% Customer B 33% * Customer C 15% * Customer D 10% * * Represents less than 10% of our total accounts and other receivables.

SIGNIFICANT ACCOUNTING POLICI_4

SIGNIFICANT ACCOUNTING POLICIES - Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2020
Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Useful life of property and equipment	3 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life of property and equipment	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life of property and equipment	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life of property and equipment	5 years

SIGNIFICANT ACCOUNTING POLICI_5

SIGNIFICANT ACCOUNTING POLICIES - Narrative (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Item Effected [Line Items]
Depreciation									$ 1,100	$ 900
Royalty Revenue, Adjustment	$ 600	$ 300	$ (20)	$ (100)	$ (200)	$ (100)	$ 200	$ 100
Canada Emergency Wage Subsidy, Subsidy Received During Period									$ 500
Fixed fee license revenue | Minimum
Item Effected [Line Items]
Revenue, payment term									30 days
Fixed fee license revenue | Maximum
Item Effected [Line Items]
Revenue, payment term									45 days
Per-unit royalty revenue | Minimum
Item Effected [Line Items]
Revenue, payment term									30 days
Per-unit royalty revenue | Maximum
Item Effected [Line Items]
Revenue, payment term									60 days

SIGNIFICANT ACCOUNTING POLICI_6

SIGNIFICANT ACCOUNTING POLICIES - Advertising (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Advertising expense	$ 180	$ 173

REVENUE RECOGNITION - Disaggreg

REVENUE RECOGNITION - Disaggregated Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 30,456	$ 35,953
Royalty and license
Disaggregation of Revenue [Line Items]
Revenue	30,176	35,643
Fixed fee license revenue
Disaggregation of Revenue [Line Items]
Revenue	5,472	12,627
Per-unit royalty revenue
Disaggregation of Revenue [Line Items]
Revenue	24,704	23,016
Development, services, and other
Disaggregation of Revenue [Line Items]
Revenue	$ 280	$ 310

REVENUE RECOGNITION - Narrative

REVENUE RECOGNITION - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Increase (decrease) in contract with customer, asset	$ (3,800)
Contract assets - current	11,623	$ 13,128
Contract assets - Long-term	4,596	$ 6,928
Capitalized contract costs	200
Fixed fee license revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 14,400
Revenue, remaining performance obligation, period	3 years
Fixed fee license revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 12,000
Revenue, remaining performance obligation, period
Fixed fee license revenue | Performance Obligation B | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 26,400
Revenue, remaining performance obligation, period

FAIR VALUE DISCLOSURES - Narrat

FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Other-than-temporary impairment charges	$ 0	$ 0

FAIR VALUE DISCLOSURES - Schedu

FAIR VALUE DISCLOSURES - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 3,019
Cash	$ 13,908	23,127
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		3,019
Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	45,614	66,370
Fair value, measurements, recurring | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		3,019
Fair value, measurements, recurring | Money market accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	45,614	63,351
Fair value, measurements, recurring | Quoted Prices  in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	45,614	63,351
Fair value, measurements, recurring | Quoted Prices  in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		0
Fair value, measurements, recurring | Quoted Prices  in Active Markets for Identical Assets (Level 1) | Money market accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	45,614	63,351
Fair value, measurements, recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	0	3,019
Fair value, measurements, recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		3,019
Fair value, measurements, recurring | Significant Other Observable Inputs (Level 2) | Money market accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	0	0
Fair value, measurements, recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	0	0
Fair value, measurements, recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		0
Fair value, measurements, recurring | Significant Unobservable Inputs (Level 3) | Money market accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	$ 0	$ 0

FAIR VALUE DISCLOSURES - Sche_2

FAIR VALUE DISCLOSURES - Schedule of Short-Term Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		$ 3,018
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses		0
Fair Value		$ 3,019
Debt securities, available-for-sale, term	1 year	1 year
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		$ 3,018
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses		0
Fair Value		$ 3,019

BALANCE SHEET DETAILS - Cash an

BALANCE SHEET DETAILS - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents, at Carrying Value [Abstract]
Cash	$ 13,908	$ 23,127
Money market funds	45,614	63,351
Cash and cash equivalents	$ 59,522	$ 86,478

BALANCE SHEET DETAILS - Account

BALANCE SHEET DETAILS - Accounts and Other Receivables (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Trade accounts receivable	$ 1,618	$ 2,972
Other Receivables, Net, Current	600	413
Accounts and other receivables	$ 2,218	$ 3,385

BALANCE SHEET DETAILS - Prepaid

BALANCE SHEET DETAILS - Prepaid Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid expenses	$ 816	$ 933
Contract assets - current	11,623	13,128
Other current assets	171	17
Prepaid expenses and other current assets	$ 12,610	$ 14,078

BALANCE SHEET DETAILS - Propert

BALANCE SHEET DETAILS - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment	$ 7,967	$ 8,722
Less accumulated depreciation and amortization 1	(7,758)	(7,496)
Property, Plant and Equipment, Net	209	1,226
Computer equipment and purchased software
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment	2,548	3,011
Machinery and equipment
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment	423	699
Furniture and fixtures
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment	1,104	1,115
Leasehold improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment	3,892	$ 3,897
San Jose California Facility | Leasehold improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment	$ 900

BALANCE SHEET DETAILS - Other A

BALANCE SHEET DETAILS - Other Assets, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Assets, Net [Abstract]
Contract assets - Long-term	$ 4,596	$ 6,928
Lease right-of-use assets	1,607	2,202
Deferred tax assets	2,659	470
Other assets	138	0
Total other assets, net	$ 9,000	$ 9,600

BALANCE SHEET DETAILS - Other C

BALANCE SHEET DETAILS - Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities, Current [Abstract]
Accrued legal	$ 202	$ 1,077
Lease liabilities - current	1,382	1,150
Other current liabilities	873	1,251
Total other current liabilities	$ 2,457	$ 3,478

CONTINGENCIES (Details)

CONTINGENCIES (Details)	Apr. 08, 2020USD ($)	Apr. 08, 2020KRW (₩)	Mar. 27, 2019USD ($)	Mar. 27, 2019KRW (₩)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Loss Contingencies [Line Items]
Long-term deposits					$ 5,077,000	$ 6,870,000
LGE
Loss Contingencies [Line Items]
Long-term deposits	$ 5,000,000	₩ 5,916,845,454
Samsung | Withholding taxes on royalty payments
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			$ 6,900,000	₩ 7,841,324,165
Litigation settlement			$ 871,454

STOCK-BASED COMPENSATION - Narr

STOCK-BASED COMPENSATION - Narrative (Details)	12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of available shares consumed for each restricted stock and restricted stock units issued	1.75
Intrinsic value of stock options exercised | $	$ 100,000	$ 200,000
Expected dividend yield	0.00%
Unrecognized compensation cost | $	$ 6,600,000
Unrecognized compensation cost, recognized over an estimated weighted-average period	1 year 10 months 24 days
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period	4 years
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award expiration period	7 years
Time-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.21	$ 3.69
Intrinsic value of stock options exercised | $	$ 2,273,000
RSAs outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period	1 year
Shares of PSUs granted (in shares)	142,000
PSUs outstanding (in shares)	130,000	91,000
RSUs outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period	3 years
Shares of PSUs granted (in shares)	515,000
PSUs outstanding (in shares)	802,000	945,000
Market Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of PSUs granted (in shares)	250,000
Award vesting rights, percentage	25.00%
PSUs outstanding (in shares)	250,000
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value on the purchase date	85.00%
Maximum number of shares per employee (in shares)	2,000
Maximum value of shares per employee | $	$ 25,000
Common stock reserved for issuance (in shares)	1,000,000
Purchases under ESPP (in shares)	22,556
Average purchase price (in dollars per share) | $ / shares	$ 5.96
Shares available for purchase (in shares)	230,881

STOCK-BASED COMPENSATION - Summ

STOCK-BASED COMPENSATION - Summary of Equity Incentive Program (Details) - shares shares in Thousands	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares available for grant (in shares)	3,254
Time-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Standard and market condition-based stock options outstanding (in shares)	828	967
RSAs outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock outstanding (in shares)	130	91
RSUs outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock outstanding (in shares)	802	945
Market Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock outstanding (in shares)	250

STOCK-BASED COMPENSATION - Su_2

STOCK-BASED COMPENSATION - Summary of Time-based Stock Options (Details) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Exercise Price Per Share
Aggregate intrinsic value, vested and expected to vest	$ 100,000	$ 200,000
Time-based stock options
Number of Shares Underlying Stock Options
Beginning outstanding balance (in shares)	967
Granted (in shares)	456
Exercised (in shares)	(76)
Canceled or expired (in shares)	(519)
Ending outstanding balance (in shares)	828	967
Weighted Average Exercise Price Per Share
Beginning outstanding balance (in dollars per share)	$ 8.55
Granted (in dollars per share)	7.58
Exercised (in dollars per share)	7.62
Canceled or expired (in dollars per share)	8.46
Ending outstanding balance (in dollars per share)	$ 8.16	$ 8.55
Weighted average remaining contractual life, outstanding	4 years 4 months 9 days	5 years 7 months 17 days
Aggregate intrinsic value, outstanding	$ 2,628,000	$ 16,000
Number of shares underlying stock options, vested and expected to vest (in shares)	734
Weighted average exercise price, vested and expected to vest (in dollars per share)	$ 8.24
Weighted average remaining contractual life, vested and expected to vest	4 years 2 months 12 days
Aggregate intrinsic value, vested and expected to vest	$ 2,273,000
Number of shares underlying stock options, exercisable (in shares)	362
Weighted average exercise price, exercisable (in dollars per share)	$ 8.26
Weighted average remaining contractual life, exercisable	2 years 8 months 15 days
Aggregate intrinsic value, exercisable	$ 887,000

STOCK-BASED COMPENSATION - Su_3

STOCK-BASED COMPENSATION - Summary of Restricted Stock Units and Restricted Stock Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
RSUs outstanding
Number of Restricted Stock Units / Awards
Beginning outstanding balance (in shares)	945
Granted (in shares)	515
Released (in shares)	(367)
Forfeited (in shares)	(291)
Ending outstanding balance (in shares)	802	945
Weighted Average Grant Date Fair Value
Beginning outstanding balance (in dollars per share)	$ 8.81
Granted (in dollars per share)	5.95
Released (in dollars per share)	9.01
Forfeited (in dollars per share)	8.53
Ending outstanding balance (in dollars per share)	$ 6.98	$ 8.81
Weighted average remaining contractual life / recognition period, outstanding	1 year	1 year 3 months
Aggregate intrinsic value, outstanding	$ 9,057	$ 7,020
RSAs outstanding
Number of Restricted Stock Units / Awards
Beginning outstanding balance (in shares)	91
Granted (in shares)	142
Released (in shares)	(71)
Forfeited (in shares)	(32)
Ending outstanding balance (in shares)	130	91
Weighted Average Grant Date Fair Value
Beginning outstanding balance (in dollars per share)	$ 7.45
Granted (in dollars per share)	6.43
Released (in dollars per share)	7.18
Forfeited (in dollars per share)	7.27
Ending outstanding balance (in dollars per share)	$ 6.53	$ 7.45
Weighted average remaining contractual life / recognition period, outstanding	5 months 12 days	5 months 12 days

STOCK-BASED COMPENSATION - Su_4

STOCK-BASED COMPENSATION - Summary of Stock-based Compensation Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	$ 4,756	$ 5,464
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	846	947
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	870	1,304
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	3,040	3,213
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	1,062	701
RSUs and RSAs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	3,638	4,692
Employee stock purchase plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	$ 56	$ 71

STOCK-BASED COMPENSATION - Valu

STOCK-BASED COMPENSATION - Valuation Assumptions (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Time-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	4 years 2 months 12 days	4 years 4 months 24 days
Volatility	52.00%	55.00%
Interest rate	1.00%	2.00%
Dividend yield	0.00%	0.00%
Market Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	1 year 2 months 12 days
Volatility	52.00%
Interest rate	1.00%
Dividend yield	0.00%

STOCKHOLDERS' EQUITY - Narrativ

STOCKHOLDERS' EQUITY - Narrative (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Oct. 22, 2014	Nov. 01, 2007
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 50,000,000
Stock repurchase program, additional authorized amount				$ 30,000,000
Repurchase of stock (in shares)	400,000	4,900,000
Repurchased shares, value	$ 2,700,000	$ 30,642,000	$ 2,741,000
Stock repurchase program, average cost (in dollars per share)	$ 7.08	$ 6.21

INCOME TAXES - Schedule of Inco

INCOME TAXES - Schedule of Income Tax Provisions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income (loss) before provision for income taxes	$ 3,159	$ (19,573)
Benefit from (provision for) income taxes	$ 2,242	$ (471)
Effective tax rate	(71.00%)	(2.40%)

INCOME TAXES - Details of Pre-T

INCOME TAXES - Details of Pre-Tax Book Income or Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (4,602)	$ (17,970)
Foreign	7,761	(1,603)
Income (loss) before benefit from (provision for) income taxes	$ 3,159	$ (19,573)

INCOME TAXES - Summary of Provi

INCOME TAXES - Summary of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current:
U.S, federal	$ 0	$ 0
State and local	(3)	(3)
Foreign	(114)	(190)
Total current	(117)	(193)
Deferred:
United States federal	0	0
State and local	0	0
Foreign	2,359	(278)
Total deferred	2,359	(278)
Income tax, total	$ 2,242	$ (471)

INCOME TAXES - Narrative (Detai

INCOME TAXES - Narrative (Detail)	12 Months Ended
	Dec. 31, 2020USD ($)
Federal
Income Taxes [Line Items]
Net operating loss carryforwards	$ 21,700,000
Tax credit carryforwards	6,400,000
State and local
Income Taxes [Line Items]
Net operating loss carryforwards	53,000,000
Tax credit carryforwards	2,600,000
Foreign tax authority
Income Taxes [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	2,200,000
Foreign tax authority | Canada | Research and development
Income Taxes [Line Items]
Tax credit carryforwards	$ 1,700,000

INCOME TAXES - Details of Signi

INCOME TAXES - Details of Significant Components of Net Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 9,239	$ 4,936
State income taxes	1	1
Deferred revenue	5,426	6,291
Research and development and other credits	8,638	8,282
Reserve and accruals recognized in different periods	1,027	1,128
Capitalized research and development expenses	3,318	3,447
Depreciation and amortization	3,134	3,636
Lease liability	351	806
Total deferred tax assets	31,134	28,527
Valuation allowance	(28,475)	(28,057)
Deferred tax liabilities:	2,659	470
Right of use lease assets	(344)	(466)
Foreign credits	(14)	(23)
Other deferred tax liabilities	0	(40)
Total deferred tax liabilities	(358)	(529)
Net deferred taxes		$ (59)
Net deferred taxes	$ 2,301

INCOME TAXES - Reconciliation B

INCOME TAXES - Reconciliation Between the Benefit (Provision) for Income Taxes at Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory rate	21.00%	21.00%
Foreign withholding	2.00%	(0.30%)
Stock-based compensation expense	12.90%	(11.30%)
Foreign rate differential	(33.00%)	(2.60%)
Prior year true-up items	1.10%	0.20%
Tax reserves	(4.00%)	(2.10%)
Other	0.10%	(1.30%)
FTC conversion true up	(10.30%)	(5.90%)
State taxes, net of federal benefit	0.10%	0.00%
Global intangible low-taxed income	21.00%	0.00%
Nondeductible officers compensation	3.50%	(0.20%)
Irish corporation restructure	(169.20%)	0.00%
Valuation allowance	83.80%	0.10%
Effective tax rate	(71.00%)	(2.40%)

INCOME TAXES - Details of Begin

INCOME TAXES - Details of Beginning and Ending Amount of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 4,826	$ 4,611
Gross increases for tax positions of prior years	0	394
Gross increases for tax positions of current year	10	34
Lapse of statute of limitations	(311)	(213)
Balance at end of year	$ 4,525	$ 4,826

NET INCOME (LOSS) PER SHARE - R

NET INCOME (LOSS) PER SHARE - Reconciliation used in Computing Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income (loss)	$ 5,401	$ (20,044)
Denominator:
Weighted-average common stock outstanding, basic (in shares)	28,117	31,529
Dilutive potential common shares:
Stock options, RSU's, RSAs and ESPP (in shares)	360	0
Shares used in computation of diluted net income (loss) per share (in shares)	28,477	31,529
Basic net income (loss) per share (in dollars per share)	$ 0.19	$ (0.64)
Diluted net income (loss) per share (in dollars per share)	$ 0.19	$ (0.64)

NET INCOME (LOSS) PER SHARE - N

NET INCOME (LOSS) PER SHARE - Narrative (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to purchase shares of common stock (in shares)	1,236	2,003
Standard and market condition stock options outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to purchase shares of common stock (in shares)	1,236	967
Share-based Payment Arrangement
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to purchase shares of common stock (in shares)	0	1,036

LEASES - Narrative (Details)

LEASES - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Mar. 31, 2020USD ($)	Jan. 31, 2020ft²	Nov. 12, 2014ft²
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 3,059	$ 3,814	$ 3,059	$ 3,814
Operating lease, borrowing rate	3.50%	3.25%	3.50%	3.25%
Right-of-use assets	$ 1,607	$ 2,202	$ 1,607	$ 2,202
Sublease, initial direct costs			300
Impairment of right-of-use lease asset			271	$ 939
Prepaid Expenses and Other Current Assets
Lessee, Lease, Description [Line Items]
Sublease, initial direct costs			100
Other Assets
Lessee, Lease, Description [Line Items]
Sublease, initial direct costs			$ 100
San Francisco California Facility
Lessee, Lease, Description [Line Items]
Operating lease liabilities					$ 600
Operating lease, borrowing rate					3.50%
Right-of-use assets					$ 600
Area | ft²						5,000
Impairment of right-of-use lease asset	$ 300
San Jose California Facility
Lessee, Lease, Description [Line Items]
Area | ft²							42,000
Impairment of right-of-use lease asset		$ 900

LEASES - Summary of Right of Us

LEASES - Summary of Right of Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Operating lease, right-of-use asset	$ 1,607	$ 2,202
Liabilities
Operating lease liabilities - current	1,382	1,150
Operating lease liabilities - long-term	1,677	2,664
Total lease liabilities	$ 3,059	$ 3,814
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent

LEASES - Schedule of Supplement

LEASES - Schedule of Supplemental Information Related To Operating Leases and Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Payments	$ 1,431	$ 1,178
Operating Lease, Weighted Average Remaining Lease Term	2 years 3 months	3 years 4 months 6 days
Operating lease, borrowing rate	3.50%	3.25%
Operating lease cost	$ 1,139	$ 1,120
Sublease income	(585)	0
Total lease cost	$ 554	$ 1,120

LEASES - Schedule of Minimum Fu

LEASES - Schedule of Minimum Future Lease Payment Obligations (Details) $ in Thousands	Dec. 31, 2020USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 1,510
2022	1,231
2023	460
2024	25
Total	$ 3,226

LEASES - Future Minimum Subleas

LEASES - Future Minimum Sublease Payments 840 (Details) $ in Thousands	Dec. 31, 2020USD ($)
Leases [Abstract]
2021	$ 1,046
2022	1,077
2023	351
Total	$ 2,474

EMPLOYEE BENEFITS - Narrative (

EMPLOYEE BENEFITS - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Company matched employee's contribution	50.00%	50.00%
Employee's contribution	$ 4,000	$ 4,000
Employee termination fees	$ 500,000

EMPLOYEE BENEFITS - Details of

EMPLOYEE BENEFITS - Details of Company Contribution to Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Company contribution to 401 (k) plan	$ 48	$ 125

SEGMENT REPORTING, GEOGRAPHIC_3

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS - Schedule of Revenue by Market Areas (Detail) - Revenues - Market area	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Concentration risk	100.00%	100.00%
Mobile, Wearables, and Consumer
Concentration Risk [Line Items]
Concentration risk	69.00%	63.00%
Gaming Devices
Concentration Risk [Line Items]
Concentration risk	15.00%	16.00%
Automotive
Concentration Risk [Line Items]
Concentration risk	15.00%	21.00%
Other
Concentration Risk [Line Items]
Concentration risk	1.00%	0.00%

SEGMENT REPORTING, GEOGRAPHIC_4

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS - Summary of Revenues by Geographic Revenue by Region (Detail) - Revenues - Geographic concentration risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Concentration risk	100.00%	100.00%
Asia
Concentration Risk [Line Items]
Concentration risk	76.00%	65.00%
North America
Concentration Risk [Line Items]
Concentration risk	16.00%	28.00%
Europe
Concentration Risk [Line Items]
Concentration risk	8.00%	7.00%

SEGMENT REPORTING, GEOGRAPHIC_5

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS - Summary of Revenues by Geographic Revenue by Country (Detail) - Revenues - Geographic concentration risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Concentration risk	100.00%	100.00%
Korea
Concentration Risk [Line Items]
Concentration risk	49.00%	45.00%
United States of America
Concentration Risk [Line Items]
Concentration risk	16.00%	28.00%
Japan
Concentration Risk [Line Items]
Concentration risk	18.00%	17.00%
Other countries with less than 10% in a year
Concentration Risk [Line Items]
Concentration risk	17.00%	10.00%

SEGMENT REPORTING, GEOGRAPHIC_6

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS - Property and Equipment, Net by Country (Details) - Property and equipment, net - Geographic concentration risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Concentration risk	100.00%	100.00%
United States of America
Segment Reporting, Asset Reconciling Item [Line Items]
Concentration risk	32.00%	85.00%
Canada
Segment Reporting, Asset Reconciling Item [Line Items]
Concentration risk	68.00%	15.00%

SEGMENT REPORTING, GEOGRAPHIC_7

SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS - Summary of Significant Customers (Detail) - Customer concentration risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues | Customer 1 [Member]
Concentration Risk [Line Items]
Concentration risk	40.00%	27.00%
Outstanding accounts and other receivables | Customer A [Member]
Concentration Risk [Line Items]
Concentration risk	39.00%	22.00%
Outstanding accounts and other receivables | Customer B
Concentration Risk [Line Items]
Concentration risk	33.00%
Outstanding accounts and other receivables | Customer C [Member]
Concentration Risk [Line Items]
Concentration risk	15.00%
Outstanding accounts and other receivables | Customer D
Concentration Risk [Line Items]
Concentration risk	10.00%

Related Party Disclosures (Deta

Related Party Disclosures (Details) - Affiliated Entity $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Reimbursement Fees and Expenses For Board Member Nominations
Related Party Transaction [Line Items]
Reimbursement fees and expenses	$ 0.2
Viex | Immersion
Related Party Transaction [Line Items]
Percent ownership by parent	5.00%

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event - USD ($) shares in Millions, $ in Millions	Mar. 03, 2021	Feb. 11, 2021	Feb. 09, 2021
Subsequent Event [Line Items]
Shelf registration, amount of capital authorized for future issuance			$ 250
Stock issued during period (in shares)	3.3
Proceeds from issuance of common stock	$ 36.3
Forecast
Subsequent Event [Line Items]
Maximum value authorized for future issuance		$ 50
Common stock issued, commission fee, percentage		2.25%