ACQUISITIONS (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended			0 Months Ended		1 Months Ended	3 Months Ended	0 Months Ended
	Feb. 28, 2013	May 31, 2013	May 31, 2012	Mar. 04, 2013 New Term Loan [Member]	May 07, 2012 Navman Wireless [Member]	May 07, 2012 Navman Wireless [Member] Pre-existing Term Loan [Member]	Feb. 28, 2013 Wireless Matrix USA, Inc. [Member]	May 31, 2012 Wireless Matrix USA, Inc. [Member]	Mar. 04, 2013 Wireless Matrix USA, Inc. [Member] Unaudited, Preliminary [Member]
Business Acquisition [Line Items]
Minimum amount of long-term supply commitment					$ 25,000
Purchase price		46,837			4,902
Cash payment for acquisition, net									46,837
Cash payment for acquisition			1,000						52,986
Proceeds from sale of common stock used to fund acquisition	44,800
Debt instrument, face amount				5,000		4,000
Estimated present value of debt						3,080
Estimated contingent royalties consideration at fair value		845			822
Percentage of rebate for products sold		15.00%			15.00%
Intangible asset amortization		$ 1,649	$ 317					$ 1,188
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares							5,175,000