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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS (Tables) | 9 Months Ended
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Sep. 30, 2020
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts Receivable | Accounts Receivable
(In thousands) | September 30, 2020 |  | December 31, 2019
Accounts receivable trade | $ | 65,427 |  |  | $ | 61,036 |
Allowance for ship and debit | (30,088) |  |  | (33,475) |
Allowance for stock rotation and rebate | (4,974) |  |  | (2,524) |
Allowance for credit losses | (918) |  |  | (763) |
Total | $ | 29,447 |  |  | $ | 24,274 |
Accounts Receivable, Allowance for Credit Loss [Table Text Block] |
| Allowance for Credit Losses
| Three Months Ended |  | Nine Months Ended
(In thousands) | September 30, 2020 |  | September 30, 2020
Beginning balance | $ | (609) |  |  | $ | (763) |
Provision for credit loss expense | (309) |  |  | (309) |
Receivables written off | — |  |  | 154 |
Recoveries collected | — |  |  | — |
Ending balance | $ | (918) |  |  | $ | (918) |
Schedule of Inventory, Current | Inventories
(In thousands) | September 30, 2020 |  | December 31, 2019
Raw materials | $ | 38,977 |  |  | $ | 39,058 |
Work-in-process | 37,682 |  |  | 25,982 |
Finished goods | 28,146 |  |  | 25,340 |
Total | $ | 104,805 |  |  | $ | 90,380 |
Schedule of Prepaid Expenses and Other Current Assets | Prepaid Expenses and Other Current Assets
(In thousands) | September 30, 2020 |  | December 31, 2019
Prepaid legal fees | $ | 589 |  |  | $ | 16 |
Prepaid income tax | 1,440 |  |  | 5,615 |
Prepaid maintenance agreements | 1,729 |  |  | 819 |
Interest receivable | 1,395 |  |  | 1,279 |
Advance to suppliers | 4,297 |  |  | 3,579 |
Other | 5,305 |  |  | 4,289 |
Total | $ | 14,755 |  |  | $ | 15,597 |
Schedule Of Intangible Assets | Intangible Assets
| September 30, 2020 |  | December 31, 2019
(In thousands) | Gross |  | Accumulated Amortization |  | Net |  | Gross |  | Accumulated Amortization |  | Net
Domain name | $ | 1,261 |  |  | $ | — |  |  | $ | 1,261 |  |  | $ | 1,261 |  |  | $ | — |  |  | $ | 1,261 |
Developed technology | 37,960 |  |  | (28,327) |  |  | 9,633 |  |  | 37,960 |  |  | (25,933) |  |  | 12,027 |
Customer relationships | 16,700 |  |  | (15,471) |  |  | 1,229 |  |  | 20,030 |  |  | (18,098) |  |  | 1,932 |
Technology licenses | 1,926 |  |  | (467) |  |  | 1,459 |  |  | 1,926 |  |  | (281) |  |  | 1,645 |
Total | $ | 57,847 |  |  | $ | (44,265) |  |  | $ | 13,582 |  |  | $ | 61,177 |  |  | $ | (44,312) |  |  | $ | 16,865 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The estimated future amortization expense related to finite-lived intangible assets at September 30, 2020, is as follows:
Fiscal Year | Estimated Amortization (In thousands)
2020 (remaining three months) | $ | 1,076 |
2021 | 3,494 |
2022 | 2,415 |
2023 | 2,173 |
2024 | 1,279 |
Thereafter | 1,884 |
Total | $ | 12,321 |
Schedule of Accumulated Other Comprehensive Income (Loss) | Changes in accumulated other comprehensive loss for three and nine months ended September 30, 2020 and 2019, were as follows:
| Unrealized Gains and Losses on Marketable Securities |  | Defined Benefit Pension Items |  | Foreign Currency Items |  | Total
| Three Months Ended |  | Three Months Ended |  | Three Months Ended |  | Three Months Ended
| September 30, |  | September 30, |  | September 30, |  | September 30,
(In thousands) | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Beginning balance | $ | 2,197 |  |  | $ | 325 |  |  | $ | (2,375) |  |  | $ | (678) |  |  | $ | (1,542) |  |  | $ | (983) |  |  | $ | (1,720) |  |  | $ | (1,336) |
Other comprehensive income (loss) before reclassifications | (633) |  |  | 208 |  |  | — |  |  | — |  |  | (51) |  |  | 27 |  |  | (684) |  |  | 235 |
Amounts reclassified from accumulated other comprehensive loss | — |  |  | — |  |  | 49 |  | (1) | 17 |  | (1) | — |  |  | — |  |  | 49 |  |  | 17 |
Net-current period other comprehensive income (loss) | (633) |  |  | 208 |  |  | 49 |  |  | 17 |  |  | (51) |  |  | 27 |  |  | (635) |  |  | 252 |
Ending balance | $ | 1,564 |  |  | $ | 533 |  |  | $ | (2,326) |  |  | $ | (661) |  |  | $ | (1,593) |  |  | $ | (956) |  |  | $ | (2,355) |  |  | $ | (1,084) |
_______________ (1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the three months ended September 30, 2020 and 2019.
| Unrealized Gains and Losses on Marketable Securities |  | Defined Benefit Pension Items |  | Foreign Currency Items |  | Total
| Nine Months Ended |  | Nine Months Ended |  | Nine Months Ended |  | Nine Months Ended
| September 30, |  | September 30, |  | September 30, |  | September 30,
(In thousands) | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Beginning balance | $ | 583 |  |  | $ | (266) |  |  | $ | (2,484) |  |  | $ | (712) |  |  | $ | (1,229) |  |  | $ | (711) |  |  | $ | (3,130) |  |  | $ | (1,689) |
Other comprehensive income (loss) before reclassifications | 981 |  |  | 799 |  |  | — |  |  | — |  |  | (364) |  |  | (245) |  |  | 617 |  |  | 554 |
Amounts reclassified from accumulated other comprehensive loss | — |  |  | — |  |  | 158 |  | (1) | 51 |  | (1) | — |  |  | — |  |  | 158 |  |  | 51 |
Net-current period other comprehensive income (loss) | 981 |  |  | 799 |  |  | 158 |  |  | 51 |  |  | (364) |  |  | (245) |  |  | 775 |  |  | 605 |
Ending balance | $ | 1,564 |  |  | $ | 533 |  |  | $ | (2,326) |  |  | $ | (661) |  |  | $ | (1,593) |  |  | $ | (956) |  |  | $ | (2,355) |  |  | $ | (1,084) |
_______________ (1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the nine months ended September 30, 2020 and 2019.

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