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Discontinued Operations - Condensed Consolidated Statements of Cash Flows (Detail)
$ 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 increase (decrease) in cash and cash equivalents $ 802
American Access Technologies, Inc.  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]  
Net cash (used in) operating activities (1,967)
Net cash provided by (used in) investing activities 2,769 [1]
Advances (to) from parent $ (802)
[1] Includes sale proceeds of $2.3 million.