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Note 12 - Segment Information (Details Textual) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 USD ($) | Apr. 01, 2017 USD ($)
Number of Operating Segments | 3 |
Inventory Charge Related to Step-up in Cost Basis | $ 17,896 |
IXYS Corporation [Member] |  |
Business Combination, Acquisition Related Costs | 38,600 |
Inventory Charge Related to Step-up in Cost Basis | 17,900 |
Selling, General and Administrative Expenses [Member] | IXYS Corporation [Member] |  |
Business Combination, Acquisition Related Costs | 10,200 |
Other Segments [Member] |  |
Restructuring Charges, Total | 800 |
Other Segments [Member] | IXYS Corporation [Member] |  |
Inventory Charge Related to Step-up in Cost Basis | 17,900 |
Other Segments [Member] | Operating Income (Loss) [Member] |  |
Business Combination, Acquisition Related Costs | 39,500 |
Other Segments [Member] | Cost of Sales [Member] |  |
Restructuring Charges, Total | 500 |
Other Segments [Member] | Cost of Sales [Member] | IXYS Corporation [Member] |  |
Business Combination, Acquisition Related Costs | 18,400 |
Other Segments [Member] | Selling, General and Administrative Expenses [Member] |  |
Business Combination, Acquisition Related Costs |  | $ 1,500
Restructuring Charges, Total | 300 |
Other Segments [Member] | Selling, General and Administrative Expenses [Member] | IXYS Corporation [Member] |  |
Business Combination, Acquisition Related Costs | 16,100 |
Other Segments [Member] | Selling, General and Administrative Expenses [Member] | All 2017 Acquisitions [Member] |  |
Business Combination, Acquisition Related Costs | 100 |
Other Segments [Member] | Research and Development Expense [Member] | IXYS Corporation [Member] |  |
Business Combination, Acquisition Related Costs | 1,600 |
Other Segments [Member] | Backlog Amortization Expense [Member] | IXYS Corporation [Member] |  |
Business Combination, Acquisition Related Costs | $ 2,500 |

X
- Definition The aggregate expense charged against earnings to allocate the cost of inventory previously stepped-up in cost basis in a business acquisition. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Details
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Namespace Prefix: |
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- Details
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Balance Type: |
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