Note 18 - Redeemable Noncontrolling Interests (Details Textual) - Beijing Tongmei Xtal Technology [Member] - USD ($) $ in Millions		1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Jan. 25, 2021	Jan. 31, 2021	Dec. 31, 2020	Jun. 30, 2025	Dec. 31, 2020
Capital Received From Private Equity Funds		$ 1.5	$ 48.1		$ 48.1
Redeemable Non Controlling Interests, Ownership Percentage			7.06%
Capital Received, Approved	$ 49.0
Percentage of Equity Issued on Conversion of Non Controlling Interests	7.28%			14.50%	7.59%
Redeemable Noncontrolling Interest, Equity, Redemption Value				$ 49.0