Note 1 - Unaudited Condensed Consolidated Financial Statements	6 Months Ended
Sep. 30, 2017
Notes to Financial Statements
Basis of Accounting [Text Block]	1. Unaudited Condensed Consolidated Financial Statements The accompanying interim unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10 -Q and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America, or U.S. GAAP, for complete financial statements. The unaudited condensed consolidated financial statements include the accounts of IXYS Corporation, or IXYS, and its wholly-owned subsidiaries. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. Some of the accounting estimates that require significant judgments by management include, but are not limited to, revenue reserves, inventory valuation, accounting for investments, accounting for income taxes and allocation of purchase price in business combinations. All significant intercompany transactions have been eliminated in consolidation. All adjustments of a normal recurring nature that, in the opinion of management, are necessary for a fair statement of the results for the interim periods have been made. The condensed consolidated balance sheet as of March 31, 2017 has been derived from our audited consolidated balance sheet as of that date. It is recommended that the interim financial statements be read in conjunction with our audited consolidated financial statements and notes thereto for the fiscal year ended March 31, 2017, or fiscal 2017, contained in our Annual Report on Form 10 -K. Interim results are not necessarily indicative of the operating results expected for later quarters or the full fiscal year. Our fiscal year end is March 31. References to any numerically identified year preceded by the word “fiscal” are references to the year ending on March 31 of such numerically identified year. Acquisition by Littelfuse, Inc. On August 28, 2017, we announced the Agreement and Plan of Merger, dated August 25, 2017, by and among IXYS Corporation, Littelfuse, Inc., or Littelfuse, and Iron Merger Co., Inc., or the merger agreement. Under the terms of the merger agreement, Littelfuse will acquire all of our outstanding shares in a cash and stock transaction and each of our stockholders will be entitled to elect to receive, per IXYS share, either $23.00 in cash or 0.1265 of a share of Littelfuse common stock, subject to proration. In total, 50% of IXYS common stock will be converted into cash and 50% into Littelfuse common stock. The transaction has been approved by our Board of Directors and is expected to close in the fi rst calendar quarter of 2018. The transaction is subject to the satisfaction of customary closing conditions, including regulatory approvals and approval by our stockholders. Littelfuse expects to finance the cash portion of the transaction consideration through a combination of existing cash and additional debt.

Unaudited Condensed Consolidated Financial Statements

The accompanying interim unaudited condensed consolidated financial statements have

been prepared in accordance with the instructions to Form

-Q and do

not

include all of the information and footnotes required by accounting principles generally accepted in the United States of America, or U.S. GAAP, for complete financial statements. The unaudited condensed consolidated financial statements include the accounts of IXYS Corporation, or IXYS, and its wholly-owned subsidiaries. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. Some of the accounting estimates that require significant judgments by management include, but are

not

limited to, revenue reserves, inventory valuation, accounting for investments, accounting for income taxes and allocation of purchase price in business combinations. All significant intercompany transactions have been eliminated in consolidation. All adjustments of a normal recurring nature that, in the opinion of management, are necessary for a fair statement of the results for the interim periods have been made. The condensed consolidated balance sheet as of

March 31, 2017

has been derived from our audited consolidated balance sheet as of that date. It is recommended that the interim financial statements be read in conjunction with our audited consolidated financial statements and notes thereto for the fiscal year ended

March 31, 2017,

or fiscal

2017,

contained in our Annual Report on Form

-K. Interim results are

not

necessarily indicative of the operating results expected for later quarters or the full fiscal year. Our fiscal year end is

March 31.

References to any numerically identified year preceded by the word “fiscal” are references to the year ending on

March 31

of such numerically identified year.

Acquisition by Littelfuse, Inc.

August 28, 2017,

we announced the Agreement and Plan of Merger, dated

August 25, 2017,

by and among IXYS Corporation, Littelfuse, Inc., or Littelfuse, and Iron Merger Co., Inc., or the merger agreement. Under the terms of the merger agreement, Littelfuse will acquire all of our outstanding shares in a cash and stock transaction and each

of our stockholders will be entitled to elect to receive, per IXYS share, either

$23.00

in cash or

0.1265

of a share of Littelfuse common stock, subject to proration. In total,

50%

of IXYS common stock will be converted into cash and

50%

into Littelfuse common stock.

The transaction has been approved by our Board of Directors and is expected to close in the fi

rst calendar quarter of

2018.

The transaction is subject to the satisfaction of customary closing conditions, including regulatory approvals and approval by our stockholders. Littelfuse expects to finance the cash portion of the transaction consideration through a combination of existing cash and additional debt.