v3.25.4
Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2025
Income Tax Disclosure [Abstract]  
Schedule of Income (Loss) before Income Tax, Domestic and Foreign
Domestic and foreign pre-tax loss from continuing operations is as follows:
 Year Ended December 31,
 20252024
Domestic$(8,128)$(13,772)
Foreign(305)1,162 
Domestic and foreign pre-tax loss$(8,433)$(12,610)
Schedule of Components of Income Tax Expense (Benefit)
Income tax expense (benefit) attributable to continuing operations is comprised of the following: 
 Year Ended December 31,
 20252024
Current:
State$3 $5 
Foreign(187)24 
Total current(184)29 
Deferred:
Foreign— 15 
Total deferred— 15 
Provision for income taxes, net:
State3 5 
Foreign(187)39 
Provision for income taxes, net:$(184)$44 
Schedule of Effective Income Tax Rate Reconciliation
The reconciliation from the U.S. federal statutory income tax rate to our effective income tax rate, applying ASU 2023-09 prospectively, is as follows: 
 Year Ended December 31, 2025
AmountRate
U.S. statutory federal tax rate$(1,771)21.0 %
State taxes and credits, net of federal benefit3 0.0 
Foreign tax effects127 (1.5)
Tax credits
Research tax credits(71)0.8 
Changes in valuation allowance1,305 (15.5)
Nontaxable or nondeductible items
Equity compensation435 (5.2)
Other2 0.0 
Changes in unrecognized tax benefits(221)2.7 
Other adjustments7 (0.1)
Total$(184)2.2 %
Schedule of Deferred Tax Assets, Liabilities, and Valuation Allowance Significant components of our deferred tax assets and liabilities are as follows: 
 December 31,
 20252024
Deferred tax assets:
Research and experimentation credit and deduction carryforwards$9,376 $10,532 
Net operating loss carryforwards34,206 33,648 
Depreciation and amortization199 494 
Reserves and accrued expenses243 67 
Deferred stock-based compensation318 631 
Foreign tax credit carryforwards53 82 
Other187 256 
Total gross deferred tax assets44,582 45,710 
Deferred tax liabilities:
Other(231)(303)
Total gross deferred tax liabilities(231)(303)
Less valuation allowance(44,382)(45,434)
Net deferred tax liabilities$(31)$(27)
Schedule of Unrecognized Tax Benefits Roll Forward
The following is a summary of the change in our liability for uncertain tax positions and interest and penalties: 
20252024
Uncertain tax positions:
Balance at beginning of year$1,536 $1,601 
Reversal of accrual for positions taken in a prior year44 14 
Reversals due to lapse of statute of limitations(163)(79)
Balance at end of year$1,417 $1,536 
Interest and penalties:
Balance at beginning of year$105 $97 
Accrual for positions taken in prior year1 10 
Reversals due to lapse of statute of limitations(97)(2)
Balance at end of year$9 $105 
Schedule of Cash Flow, Supplemental Disclosures
Cash paid for income taxes (net of refunds) consisted of the following:
 Year Ended December 31, 2025
State
California$6 
Other1 
Foreign
China5 
Taiwan28 
Total income taxes paid$40