CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 307	$ 363
Other current assets	27	9
Total current assets	334	372
Property and equipment, net of depreciation
Land, buildings and equipment	626	636
Note and interest receivable - related party
Note receivable	3,542	3,542
Interest receivable	40	44
Note and interest receivable - related party	3,582	3,586
Total assets	4,542	4,594
Current liabilities
Accounts payable	27	20
Accrued expenses	36	37
Total current liabilities	63	57
Stockholders' equity
Preferred stock, Series B, $10 par value; authorized 100,000 shares, 1 issued and outstanding at September 30, 2025 and December 31, 2024	1	1
Common stock, $.01 par value; authorized, 100,000,000 shares; issued and outstanding, 5,131,934 shares at September 30, 2025 and December 31, 2024	51	51
Additional paid-in capital	63,579	63,579
Accumulated deficit	(59,152)	(59,094)
Total stockholders' equity	4,479	4,537
Total liabilities & stockholders' equity	$ 4,542	$ 4,594

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).