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Note I - Supplemental Disclosures of Cash Flow Information and Non-cash Investing and Financing Activities (Details Textual)	12 Months Ended
	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