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Restructuring - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended			3 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
Restructuring - Additional Information (Detail) (USD $)	Mar. 31, 2014 Employees	Feb. 28, 2014 Employees	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Employee Severance Costs [Member]	Dec. 31, 2013 Employee Severance Costs [Member]	Mar. 31, 2014 Facility Exit Related Costs [Member]	Mar. 31, 2014 Restructuring Charges [Member]	Dec. 31, 2013 Restructuring Charges [Member]	Mar. 31, 2014 Mobile Computing Products [Member]	Mar. 31, 2014 Mobile Computing Products [Member]	Mar. 31, 2014 M2M Products and Solutions [Member]	Mar. 31, 2014 M2M Products and Solutions [Member]	Mar. 31, 2014 Short-term [Member]	Mar. 31, 2014 Long-term [Member]
Restructuring Cost and Reserve [Line Items]
Reduction in number of employees after restructuring	21	41
Restructuring charges			$ 1,166,000	$ 0		$ 1,100,000		$ 72,000	$ 4,500,000	$ 3,300,000	$ 1,100,000	$ 4,200,000	$ 42,000.0	$ 248,000.0
Restructuring liability	$ 1,041,000		$ 1,041,000		$ 881,000	$ 331,000	$ 0								$ 775,000	$ 266,000

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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