SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Reconciliation of total consolidated assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Unallocated assets - DSIT headquarters	$ 5,519		$ 6,156		$ 6,181
Unallocated assets - OmniMetrix headquarters	640		1,072		0
Unallocated assets corporate headquarters	15,927	[1]	24,518	[1]	57,999	[1]
Total assets for reportable segments	50,956		67,336		85,805
Cash	15,829		22,676		33,666
Interest-bearing Deposits in Banks and Other Financial Institutions					18,000
Escrow Deposit					5,961
Restricted Cash and Cash Equivalents	306		814
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets for reportable segments	$ 28,870		$ 35,590		$ 21,625

[1] In 2013, includes $15,829 of unrestricted cash. In 2012, includes $22,676 of unrestricted cash. In 2011, includes $33,666 of unrestricted cash, $18,000 of short-term deposits and $5,961 of funds held in escrow.