Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

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Balance Type:	na
Period Type:	duration

- Definition

Represents the number of promissory notes issued.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent of the shares of the entity owned by a shareholder.

+ References

No definition available.

+ Details

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Namespace Prefix:	utgn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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Balance Type:
Period Type:

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- Details

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Credit Arrangements, Stock Buy-Back Program (Details)		1 Months Ended	9 Months Ended
Credit Arrangements, Stock Buy-Back Program (Details)	Jul. 22, 2016 USD ($) Note shares	Apr. 30, 2017 USD ($)	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($)
Stock Repurchase Program [Abstract]
Treasury stock shares acquired (in shares) \| shares			21,400
Repayments			$ 1,450,000	$ 0
SoftVest L P [Member]
Stock Repurchase Program [Abstract]
Repayments		$ 725,000
SoftSearch Investment L P [Member]
Stock Repurchase Program [Abstract]
Repayments		$ 725,000
Stock Buy-Back Program [Member]
Stock Repurchase Program [Abstract]
Treasury stock shares acquired (in shares) \| shares	300,000
% of shares owned by shareholder	8.00%
Stock Buy-Back Program [Member] \| Promissory Notes [Member]
Stock Repurchase Program [Abstract]
Number of promissory notes issued \| Note	2
Face amount of debt instruments issued	$ 2,900,000
Interest rate	0.00%
Stock Buy-Back Program [Member] \| Promissory Notes [Member] \| First Half of Note Value [Member]
Stock Repurchase Program [Abstract]
Term of debt			1 year
Stock Buy-Back Program [Member] \| Promissory Notes [Member] \| Second Half of Note Value [Member]
Stock Repurchase Program [Abstract]
Term of debt			2 years