XML 45 R62.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 8 - Goodwill (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Oct. 01, 2014
Note 8 - Goodwill (Details) [Line Items] |  |
Percentage Fair Value Of Equity Above Carrying Value Of Equity | 13.00%strl_PercentageFairValueOfEquityAboveCarryingValueOfEquity |
Goodwill, Impairment Loss | $ 0 us-gaap_GoodwillImpairmentLoss |
2014 Step One Test [Member] |  |
Note 8 - Goodwill (Details) [Line Items] |  |
Percentage Fair Value Of Equity Above Carrying Value Of Equity | 19.00%strl_PercentageFairValueOfEquityAboveCarryingValueOfEquity / us-gaap_ValuationTechniqueAxis = strl_StepOne2014TestMember |
Fair Value, Inputs, Level 1 [Member] |  |
Note 8 - Goodwill (Details) [Line Items] |  |
Share Price | $ 6.39 us-gaap_SharePrice / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | $ 7.54 us-gaap_SharePrice / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member

X
- Details
Name: | strl_Note8GoodwillDetailsLineItems
Namespace Prefix: | strl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of the company fair value of equity above the carrying value of equity. + References No definition available. + Details
Name: | strl_PercentageFairValueOfEquityAboveCarryingValueOfEquity
Namespace Prefix: | strl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=strl_StepOne2014TestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |