Note 2 - Significant Accounting Policies - Distributions Declared (Details) $ / shares in Units, $ in Thousands	6 Months Ended
Jun. 30, 2026 USD ($) $ / shares
Distribution Amount	$ 96
Distribution, common	$ 7,248
O 2026 M3 Dividends [Member]
Record Date	Mar. 31, 2026
Payment Date	Apr. 30, 2026
Distribution per Share, preferred (in dollars per share) \| $ / shares	$ 0.144
Distribution Amount	$ 48
Distribution per Share, common (in dollars per share) \| $ / shares	$ 0.06
Distribution, common	$ 1,176
O 2026 M1 Dividends [Member]
Record Date	Jan. 30, 2026
Payment Date	Apr. 30, 2026
Distribution per Share, common (in dollars per share) \| $ / shares	$ 0.082
Distribution, common	$ 1,511
O 2026 M6 Dividends [Member]
Record Date	Jun. 30, 2026
Payment Date	Jul. 31, 2026
Distribution per Share, preferred (in dollars per share) \| $ / shares	$ 0.144
Distribution Amount	$ 48
Distribution per Share, common (in dollars per share) \| $ / shares	$ 0.058
Distribution, common	$ 1,198
O 2026 M2 Dividends [Member]
Record Date	Feb. 27, 2026
Payment Date	Apr. 30, 2026
Distribution per Share, common (in dollars per share) \| $ / shares	$ 0.054
Distribution, common	$ 1,027
O 2026 M4 Dividends [Member]
Record Date	Apr. 30, 2026
Payment Date	Jul. 31, 2026
Distribution per Share, common (in dollars per share) \| $ / shares	$ 0.058
Distribution, common	$ 1,145
O 2025 M5 Dividends [Member]
Record Date	May 31, 2026
Payment Date	Jul. 31, 2026
Distribution per Share, common (in dollars per share) \| $ / shares	$ 0.059
Distribution, common	$ 1,191

Aggregate dividends declared during the period for each share of common stock outstanding.

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

+ References

+ Details

Name:	us-gaap_DividendsCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 405
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477787/942-405-45-2

+ Details

Name:	us-gaap_DividendsPreferredStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

+ Details

Name:	us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DividendsAxis=remc_O2026M3DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=remc_O2026M1DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=remc_O2026M6DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=remc_O2026M2DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=remc_O2026M4DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=remc_O2025M5DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: