Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended					12 Months Ended			12 Months Ended		0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 SENS [Member]	Sep. 30, 2013 GlobalTrak [Member]	Dec. 31, 2013 GlobalTrak [Member]	Oct. 31, 2013 GlobalTrak [Member]	Sep. 30, 2013 MobileNet [Member]	Dec. 31, 2013 MobileNet [Member]	Dec. 31, 2013 MobileNet [Member] Second Condition [Member]	Dec. 31, 2013 MobileNet [Member] First Condition [Member]	Dec. 31, 2013 LMS [Member]	Dec. 31, 2012 LMS [Member]	Dec. 31, 2013 PAR [Member]	Dec. 31, 2013 StarTrak [Member]	Dec. 31, 2013 Warranty Obligations [Member]	Dec. 31, 2013 Relating to Fuel Sensor [Member]	Dec. 31, 2012 Relating to Fuel Sensor [Member]	Mar. 28, 2012 Satcom [Member]	Dec. 31, 2013 Satcom [Member]	Dec. 31, 2012 Satcom [Member]
Business Acquisition [Line Items]
Cash			$ 1,978,000		$ 2,990,000			$ 3,231,000			$ 4,000,000			$ 18,242,000				$ 119,000
Acquisition effective date			Oct. 01, 2013		Apr. 03, 2013			Apr. 01, 2013			Jan. 12, 2012			May 16, 2011
Discount rate to reflect risk characteristics of intangible assets			43.00%		37.00%			24.00%
Cash deposited in escrow with third party escrow agent					500,000
Amount available to pay indemnification obligations					500,000
Working capital adjustment				86,000			28,000				112,000
Measurement period for goodwill adjustment					1 year
Amount deposited in escrow account					500,000
Escrow disbursement agreement					one-half of the $500, less the aggregate amount of claims made by the Company against SPC six months from April 3, 2013
Escrow amount to be released						250,000
Common stock, shares issued	48,216,480	46,783,568						329,344
Common stock issued, per share								$ 4.96
Earn-out payment								2,000,000
Earn-out payment percentage									35.00%	50.00%
Potential earn-out amounts paid in common stock at Company's option								50.00%
Average closing price of distribution event	20 days							20 days
Potential earn-out amount payment, description	Within 30 days							Contingent consideration payable by the Company to MobileNet if service revenues attributable to the MobileNet business for either of the two one year earn-out periods May 1, 2013 through April 30, 2014 and May 1, 2014 through April 30, 2015 are in excess of the specified baseline amount.
Liability for earn-out payment								1,539,000			740,000
Portion of earn-out in other liabilities								918,000			184,000	270,000
Reduction in liability								Achievement below certain thresholds will reduce the liability to zero
Discount percentage	19.00%							18.00%
Changes in fair value of earn-out amounts								621,000			382,000
Shares deposited into escrow account								164,672			387,097			166,611
Period for amount kept in escrow account	Up to fifteen months										Up to fifteen months
Issuance of Company's common stock											645,162
Working capital measurement period	1 year
Additional consideration paid for contingent payments											3,950,000
Consideration paid for contingent payments based on achieving subscriber targets											3,000,000
Consideration paid for contingent payments based on achieving sales targets											950,000
Common stock issuance term, description	20-day average closing price ending on the third trading day preceding the date of payment
Portion of earn-out in accrued liabilities											24,000	320,000
Result of lower sales targets achievement than the targets	950,000
Decreased fair value of earn-out amounts	150,000
Claim made against PAR under the escrow agreement, remaining balance													285,000
Claim made against PAR under the escrow agreement													843,000
Indemnification claim recorded in escrow account													285,000
Interest percentage of secured promissory note forgive														6.00%
Warranty coverage on accrued product	1 year
Coverage percentage of certain costs relating to fuel sensor warranty obligations															50.00%
Minimum amount of warranty expenses and fuel sensors to issue notice																600,000
Percentage of the fuel sensor damages for the calculation of number of shares issuable to escrow agent	50.00%
Common stock share issued valued at per share																$ 3.001
Portion of earn out in other liabilities																662,000
Gain on fair value of common stock																253,000	97,000
Noncontrolling ownership interests																		48.00%
Purchase noncontrolling ownership interests			1,747,000		440,000			3,504,000										1,119,000
Issuance of common stock																		263,133
Common stock per share price																		$ 3.80
Transaction fees																		80,000
Increase in noncontrolling interests																			180,000
Increase in accumulated other comprehensive income																			16,000
Decrease in additional paid-in capital																			395,000
Payment made to note holders																				253,000
Payment made to related-party creditor																				43,000
Outstanding principal and accrued interest																				1,340,000
Outstanding principal and accrued interest owed to the related-party																				290,000
Gain on extinguishment of debt		1,062,000																		1,062,000
Expenses related to extinguishment of debt																				24,000
Payment made to trade creditor																				128,000
Outstanding trade payables																				256,000
Reduction in selling, general and administrative expenses																				$ 128,000