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Discontinued Operations - Components of the Balance Sheet (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Current assets of discontinued operations $ 0 $ 1,070
Non-current assets of discontinued operations 0 73
Current liabilities of discontinued operations $ 0 939
Discontinued Operations, Disposed of by Means Other than Sale [Member] | EFLS [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash and cash equivalents   93
Trade accounts receivable   312
Inventories   0
Prepaid and other current assets   7
Current assets of discontinued operations   412
Property and equipment, net   0
Other assets   0
Non-current assets of discontinued operations   0
Total assets of discontinued operations   412
Accounts payable   163
Accrued liabilities   73
Billings in excess of costs and estimated earnings on uncompleted contracts   23
Current liabilities of discontinued operations   259
Total liabilities of discontinued operations   259
Discontinued Operations, Disposed of by Sale [Member] | CLL [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash and cash equivalents   4
Trade accounts receivable   145
Inventories   414
Prepaid and other current assets   95
Current assets of discontinued operations   658
Property and equipment, net   23
Other assets   50
Non-current assets of discontinued operations   73
Total assets of discontinued operations   731
Accounts payable   318
Accrued liabilities   362
Billings in excess of costs and estimated earnings on uncompleted contracts   0
Current liabilities of discontinued operations   680
Total liabilities of discontinued operations   680
Discontinued Operations [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash and cash equivalents   97
Trade accounts receivable   457
Inventories   414
Prepaid and other current assets   102
Current assets of discontinued operations   1,070
Property and equipment, net   23
Other assets   50
Non-current assets of discontinued operations   73
Total assets of discontinued operations   1,143
Accounts payable   481
Accrued liabilities   435
Billings in excess of costs and estimated earnings on uncompleted contracts   23
Current liabilities of discontinued operations   939
Total liabilities of discontinued operations   $ 939