CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 304	$ 383
Other current assets	65	13
Total current assets	369	396
Property and equipment, net of depreciation
Land, buildings and equipment	616	622
Note and interest receivable - related party
Note receivable	3,542	3,542
Interest receivable
Note and interest receivable - related party	3,542	3,542
Total assets	4,527	4,560
Current liabilities
Accounts payable (including $8 due to related parties in 2026 and 2025)	47	26
Accrued expenses	69	43
Total current liabilities	116	69
Stockholders' equity
Preferred stock, Series B, $10 par value; authorized 100,000 shares, 1 issued and outstanding at June 30, 2026 and December 31, 2025	1	1
Common stock, $.01 par value; authorized, 100,000,000 shares; issued and outstanding, 5,131,934 shares at June 30, 2026 and December 31, 2025	51	51
Additional paid-in capital	63,579	63,579
Accumulated deficit	(59,220)	(59,140)
Total stockholders' equity	4,411	4,491
Total liabilities and stockholders' equity	$ 4,527	$ 4,560

No definition available.

Name:	gbr_NoteAndInterestReceivableRelatedParty
Namespace Prefix:	gbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).