DISCONTINUED OPERATIONS - Summary of financial results of discontinued operations (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2014
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Net loss from discontinued operations $ (492)
Discontinued operation | BNI Solutions, Inc. Digilog, Inc. and DCX Systems, Inc  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Revenues from discontinued operations 207
Loss from discontinued operations before income taxes (285)
Income tax benefit (127)
Loss from discontinued operations, net of income taxes (158)
Loss on disposal of subsidiary included in discontinued operations (309)
Loss on dissolution of subsidiaries included in discontinued operations (25)
Net loss from discontinued operations $ (492)