Note 1 - Unaudited Condensed Consolidated Financial Statements (Details Textual) - IXYS [Member] - Littlefuse [Member]	Aug. 28, 2017 $ / shares
Business Acquisition, Share Price	$ 23
Business Acquisition, Shares, Per Share	0.1265
Business Acquisition, Acquired in Cash, Percent	50.00%
Business Acquisition, Acquired in Stock, Percent	50.00%

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

No definition available.

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant