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Debt - Borrowing Thresholds (Details) | Jun. 30, 2013
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Level I |
Debt Instrument [Line Items] |
Liquidity is less than or equal to at any time during the period | Liquidity ≤ $20,000 at any time during the period
Excess Availability is less than or equal to at any time during the period | Excess Availability ≤ $7,500 at any time during the period
Fixed charge coverage ratio is less than | Fixed charge coverage ratio < 1:1
Percentage points | 4.00 percentage points
Level II |
Debt Instrument [Line Items] |
Liquidity is greater than at all times during the period | Liquidity > $20,000 at all times during the period; and Liquidity ≤ $30,000 at any time during the period; and
Excess availability is | Excess Availability ≤ $7,500 at any time during the period
Fixed charge coverage is greater than or equal to | Fixed charge coverage ratio ≥ 1:1
Percentage points | 3.50 percentage points
Level III |
Debt Instrument [Line Items] |
Liquidity is greater than at all times during the period | Liquidity > $30,000 at all times during the period
Percentage points | 3.00 percentage points

X
- Definition The amount of excess availability as established by the borrowing thresholds. + References No definition available. + Details
Name: | iesc_Excessavailability
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of excess availability as established by the borrowing thresholds. + References No definition available. + Details
Name: | iesc_ExcessAvailabilityLessThanEqual
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The fixed charge coverage ratio as established by the borrowing thresholds. + References No definition available. + Details
Name: | iesc_FixedChargeCoverageRatioGreaterThanEqual
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The fixed charge coverage ratio as established by the borrowing thresholds. + References No definition available. + Details
Name: | iesc_FixedChargeCoverageRatioLessThan
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of Liquidity as established by the borrowing thresholds. + References No definition available. + Details
Name: | iesc_LiquidityGreaterThan
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of Liquidity as established by the borrowing thresholds. + References No definition available. + Details
Name: | iesc_LiquidityLessThanEqual
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage points assessed to each level of the borrowing thresholds. + References No definition available. + Details
Name: | iesc_PercentagePoints
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration