REVENUE RECOGNITION (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 13,829,000	$ 14,671,000
Less: Current portion	6,499,000	6,742,000	[1]
Deferred revenue - less current portion	7,330,000	7,929,000	[1]
Deferred activation fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	515,000	532,000
Deferred revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	532,000	1,985,000
Deferred maintenance revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	4,001,000	3,211,000
Deferred remote transportation asset management product revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 8,781,000	$ 8,943,000

[1] Derived from audited balance sheet as of December 31, 2014.