Borrowing Arrangements	3 Months Ended
Jun. 30, 2011
Debt Disclosure Abstract
Debt Disclosure Text Block	8. Borrowing Arrangements Bank of the West On November 13, 2009, we entered into a credit agreement for a revolving line of credit with Bank of the West, or BOW, under which we could borrow up to $15.0 million and all amounts owed under the credit agreement were due and payable on October 31, 2011. On December 29, 2010, we entered into an amendment with BOW to increase the line of credit to $20.0 million and to extend the expiration date to October 31, 2013. Borrowings may be repaid and re-borrowed at any time during the term of the credit agreement. The obligations are guaranteed by two of our subsidiaries. At June 30, 2011, the outstanding principal balance under the credit agreement was $15.0 million. The credit agreement provides different interest rate alternatives under which we may borrow funds. We may elect to borrow based on LIBOR plus a margin, an alternative base rate plus a margin or a floating rate plus a margin. The margin can range from 1.5% to 3.25%, depending on interest rate alternatives and on our leverage of liabilities to effective tangible net worth. The effective interest rate as of June 30, 2011 was 3.25%. The credit agreement is subject to a set of financial covenants, including minimum effective tangible net worth, the ratio of cash, cash equivalents and accounts receivable to current liabilities, profitability, a ratio of EBITDA to interest expense and a minimum amount of U.S. domestic cash on hand. At June 30, 2011, we complied with all of these financial covenants. The credit agreement also includes a $3.0 million letter of credit subfacility. See Note 16, “Commitments and Contingencies” for further information regarding the terms of the subfacility. IKB Deutsche Industriebank On June 10, 2005, IXYS Semiconductor GmbH, our German subsidiary, borrowed €10.0 million, or about $12.2 million at the time, from IKB Deutsche Industriebank for a term of 15 years. The outstanding balance at June 30, 2011 was €6.0 million, or $8.6 million. The interest rate on the loan is determined by adding the then effective three month Euribor rate and a margin. The margin can range from 70 basis points to 125 basis points, depending on the calculation of a ratio of indebtedness to cash flow for our German subsidiary. In June 2010, we entered into an interest rate swap agreement commencing June 30, 2010. The swap agreement has a fixed interest rate of 1.99% and expires on June 30, 2015. It is not designated as a hedge in the financial statements. See Note 3, “Fair Value” for further information regarding the derivative contract. During each fiscal quarter, a principal payment of €167,000, or about $240,000, and a payment of accrued interest are required. Financial covenants for a ratio of indebtedness to cash flow, a ratio of equity to total assets and a minimum stockholders' equity for the German subsidiary must be satisfied for the loan to remain in good standing. The loan may be prepaid in whole or in part at the end of a fiscal quarter without penalty. At June 30, 2011, we complied with the financial covenants. The loan is partially collateralized by a security interest in the facility owned by our company in Lampertheim, Germany. Note payable issued in acquisition On September 10, 2008, we issued a note payable with a face value of $2.0 million in connection with the purchase of real property and the acquisition of the shares of Reaction Technology Incorporated, or RTI. The note is repayable in 60 equal monthly installments of $38,666, which includes interest at an annual rate of 6.0%. The note is collateralized by a security interest in the property acquired and the current assets of RTI.

Borrowing Arrangements

3 Months Ended

Jun. 30, 2011

8. Borrowing Arrangements

Bank of the West

On November 13, 2009, we entered into a credit agreement for a revolving line of credit with Bank of the West, or BOW, under which we could borrow up to $15.0 million and all amounts owed under the credit agreement were due and payable on October 31, 2011. On December 29, 2010, we entered into an amendment with BOW to increase the line of credit to $20.0 million and to extend the expiration date to October 31, 2013. Borrowings may be repaid and re-borrowed at any time during the term of the credit agreement. The obligations are guaranteed by two of our subsidiaries. At June 30, 2011, the outstanding principal balance under the credit agreement was $15.0 million.

The credit agreement provides different interest rate alternatives under which we may borrow funds. We may elect to borrow based on LIBOR plus a margin, an alternative base rate plus a margin or a floating rate plus a margin. The margin can range from 1.5% to 3.25%, depending on interest rate alternatives and on our leverage of liabilities to effective tangible net worth. The effective interest rate as of June 30, 2011 was 3.25%.

The credit agreement is subject to a set of financial covenants, including minimum effective tangible net worth, the ratio of cash, cash equivalents and accounts receivable to current liabilities, profitability, a ratio of EBITDA to interest expense and a minimum amount of U.S. domestic cash on hand. At June 30, 2011, we complied with all of these financial covenants.

The credit agreement also includes a $3.0 million letter of credit subfacility. See Note 16, “Commitments and Contingencies” for further information regarding the terms of the subfacility.

IKB Deutsche Industriebank

On June 10, 2005, IXYS Semiconductor GmbH, our German subsidiary, borrowed €10.0 million, or about $12.2 million at the time, from IKB Deutsche Industriebank for a term of 15 years. The outstanding balance at June 30, 2011 was €6.0 million, or $8.6 million.

The interest rate on the loan is determined by adding the then effective three month Euribor rate and a margin. The margin can range from 70 basis points to 125 basis points, depending on the calculation of a ratio of indebtedness to cash flow for our German subsidiary. In June 2010, we entered into an interest rate swap agreement commencing June 30, 2010. The swap agreement has a fixed interest rate of 1.99% and expires on June 30, 2015. It is not designated as a hedge in the financial statements. See Note 3, “Fair Value” for further information regarding the derivative contract.

During each fiscal quarter, a principal payment of €167,000, or about $240,000, and a payment of accrued interest are required. Financial covenants for a ratio of indebtedness to cash flow, a ratio of equity to total assets and a minimum stockholders' equity for the German subsidiary must be satisfied for the loan to remain in good standing. The loan may be prepaid in whole or in part at the end of a fiscal quarter without penalty. At June 30, 2011, we complied with the financial covenants. The loan is partially collateralized by a security interest in the facility owned by our company in Lampertheim, Germany.

Note payable issued in acquisition

On September 10, 2008, we issued a note payable with a face value of $2.0 million in connection with the purchase of real property and the acquisition of the shares of Reaction Technology Incorporated, or RTI. The note is repayable in 60 equal monthly installments of $38,666, which includes interest at an annual rate of 6.0%. The note is collateralized by a security interest in the property acquired and the current assets of RTI.