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Note I - Supplemental Disclosures of Cash Flow Information and Non-cash Investing and Financing Activities (Details Textual) | 12 Months Ended
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Dec. 31, 2025 USD ($) shares
Convertible Common Stock, Shares Issuable upon Conversion | shares | 174
Payments for Accrued Dividends on Unconverted Shares | $ | $ 174

X
- Definition Number of shares issuable upon the conversion of convertible common stock. + References No definition available. + Details
Name: | ug_ConvertibleCommonStockSharesIssuableUponConversion
Namespace Prefix: | ug_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of cash outflow for payments for accrued dividends on unconverted shares. + References No definition available. + Details
Name: | ug_PaymentsForAccruedDividendsOnUnconvertedShares
Namespace Prefix: | ug_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration