Commitments and Contingencies - Additional Information (Detail)				1 Months Ended	3 Months Ended		12 Months Ended
	Oct. 26, 2016 USD ($) Patent	Jul. 15, 2016 USD ($)	Jul. 14, 2015 USD ($)	Apr. 30, 2014 USD ($)	Mar. 31, 2017 USD ($) Patent	Mar. 31, 2016 USD ($)	Dec. 31, 2001 USD ($)	Feb. 09, 2017 Patent	Oct. 19, 2016 Patent	Jul. 18, 2016 Patent	Apr. 07, 2016 Patent
Procurement Agreement [Member] | Europe [Member] | Airtime [Member]
Long Term Purchase Commitment [Line Items]
Credits provided							$ 3,736,000
Credits used					$ 7,000	$ 7,000
Unused credits granted					$ 2,002,000	$ 2,031,000
Launch Plus One Year In Orbit Insurance Coverage for First Launch of Six Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program				$ 66,000,000
Launch Vehicle Flight Only Insurance Coverage for First Launch of Six Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program				22,000,000
First Launch of Six Satellites [Member]
Long Term Purchase Commitment [Line Items]
Premium cost for launch of satellite				9,953,000
Launch Plus One Year In Orbit Insurance Coverage for Second Launch of Eleven Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program				120,000,000
Launch Vehicle Flight Only Insurance Coverage for Second Launch of Eleven Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program				22,000,000
Second Launch of Eleven Satellites [Member]
Long Term Purchase Commitment [Line Items]
Premium cost for launch of satellite				$ 16,454,000
Percentage of premium as to aggregate premium				5.00%
Launch Plus One Year In-orbit Insurance Coverage for Five Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program			$ 40,000,000
Extended insurance premium cost for satellites		$ 179,000
Extended insurance coverage end date		Dec. 21, 2016
Insurance policy expiration date			Dec. 21, 2016
CalAmp Corp [Member]
Long Term Purchase Commitment [Line Items]
Number of patent infringement | Patent											5
Number of patent denied for reconsideration | Patent									4
Number of patent in-suit | Patent										1
Number of remaining patent in-suit | Patent					1
Actions taken by court which impacted the lawsuit					Each of the Company and CalAmp filed motions for summary judgment with respect to CalAmp’s counterclaim for inequitable conduct related to the U.S. Patent and Trademark Office action to correct the one remaining patent-in-suit. CalAmp’s motion requested summary judgment finding inequitable conduct rendering the patent unenforceable and providing a basis to seek an award of its legal fees. The Company’s motion requested summary judgment to dismiss such counterclaim.
CalAmp Wireless Networks Corporation [Member]
Long Term Purchase Commitment [Line Items]
Number of patent infringement | Patent	2
Accrual for claims	$ 0
Number of invalid patent suit | Patent								1