TRANSACTIONS WITH MANAGING SHAREHOLDER AND AFFILIATES (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014
TRANSACTIONS WITH MANAGING SHAREHOLDER AND AFFILIATES [Abstract]
Annual management fee	$ 2,332cik1060755_AnnualManagementFeeAmount
Annual management fee, percentage	2.50%
Annual interest rate on management fee balance	10.00%us-gaap_RelatedPartyTransactionRate
Percentage of distributions allocated to Managing Shareholder	1.00%
Maximum percentage of shareholder distributions	12.00%
Percentage of distributions allocated to Managing Shareholder after shareholders have received maximum distribution	20.00%
Percentage of proceeds from dispositions allocated to Managing Shareholder	1.00%
Percentage of proceeds from dispositions allocated to Managing Shareholder after shareholders have reached payout	20.00%
Ridgewood Renewable Power LLC [Member]
Related Party Transaction [Line Items]
Number of shares owned	2.66
Controlling Member [Member]
Related Party Transaction [Line Items]
Number of shares owned	0.15

The annual management fee amount.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

The annual management fee, expressed as a percentage of total contributed capital.

+ References

No definition available.

+ Details

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- Definition

The percentage threshold for when shareholders receive distributions, expressed as a percentage of their equity contribution, that determines the managing shareholder distribution percentage.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Number of shares owned

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The percentage of distributions allocated to the managing shareholder.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of distributions allocated to the managing shareholder after the shareholders have received the maximum distribution.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The percentage of proceeds from dispositions allocated to the managing shareholder.

+ References

No definition available.

+ Details

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Namespace Prefix:	cik1060755_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of proceeds from dispositions allocated to the managing shareholder after shareholders have reached the payout.

+ References

No definition available.

+ Details

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Namespace Prefix:	cik1060755_
Data Type:	num:percentItemType
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- Details

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- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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Period Type:	duration

- Details

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- Details

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- Details

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