Satellite Network and Other Equipment - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended
	Aug. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2016	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Depreciation and amortization expense		$ 11,022	$ 8,959
Products and Services [Member]
Property Plant And Equipment [Line Items]
Company capitalized internal costs attributable to the design, development and enhancements of the company's products and services		3,097	2,188
Fixed Assets [Member]
Property Plant And Equipment [Line Items]
Depreciation and amortization expense		$ 8,330	$ 5,431
Depreciation and amortization expense percentage related to cost of services		65.00%	67.00%
Depreciation and amortization expense percentage related to cost of product sales		8.00%	10.00%
Internal-use Software [Member]
Property Plant And Equipment [Line Items]
Amortization of internal-use software		$ 1,351	$ 850
Satellite Network [Member]
Property Plant And Equipment [Line Items]
Impairment loss on asset			466
Removal/decrease in satellite network and other equipment, net			2,374		$ 137
Accumulated depreciation on equipment			$ 1,908
OG2 Satellite Impairment [Member]
Property Plant And Equipment [Line Items]
Removal/decrease in satellite network and other equipment, net				$ 13,474
Non-cash impairment charge	$ 10,680
Accumulated depreciation on equipment				$ 2,794