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Note 4 - BALANCE SHEET COMPONENTS - Other (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Unbilled Receivables, Current | $ 8,900,000 | $ 11,800,000 |  | $ 8,900,000 |
Unbilled Receivables, Not Expected to be Billed and Collected in Next Twelve Months | 1,100,000 | 1,300,000 |  | 1,100,000 |
Depreciation, Depletion and Amortization, Nonproduction, Total | 1,400,000 |  | $ 1,600,000 | 2,800,000 | $ 3,300,000
Impairment of Intangible Assets, Finite-lived | 0 |  | 0 | 0 | 0
Goodwill | 14,123,000 | 14,123,000 |  | 14,123,000 |
Impairment of goodwill | 0 |  | 0 | 0 | 0
Amortization of Intangible Assets, Total | 867,000 |  | 849,000 | $ 1,734,000 | 1,698,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year) |  |  |  | 6 years 7 months 6 days |
Write-down in value of property and equipment |  | 3,200,000 |  |  |
Cost of Sales [Member] |  |  |  |  |
Amortization of Intangible Assets, Total | 553,000 |  | 536,000 | $ 1,106,000 | 1,071,000
Costs and Expenses [Member] |  |  |  |  |
Amortization of Intangible Assets, Total | 314,000 |  | $ 313,000 | 628,000 | $ 627,000
DFI Test Equipment [Member] |  |  |  |  |
Construction in Progress, Gross | $ 19,800,000 | $ 20,000,000.0 |  | $ 19,800,000 |

X
- Definition Amount of receivables under long-term contracts that have not been billed and were not billable that are expected to be collected after the next fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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