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Loan Agreement Quarterly Financial Covenants (Details) - Minimum | 12 Months Ended
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Dec. 31, 2017
Required Minimum Value [Member] |
Line of Credit Facility [Line Items] |
EBITDA to Fixed Charges | 1.00
Actual Value [Member] |
Line of Credit Facility [Line Items] |
EBITDA to Fixed Charges | 1.00

X
- Definition EBITDA to Fixed Charges as defined by the loan agreement + References No definition available. + Details
Name: | laws_EBITDAtoFixedCharges
Namespace Prefix: | laws_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | laws_DebtCovenantValueAxis=laws_RequiredMinimumValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | laws_DebtCovenantValueAxis=laws_ActualValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |