Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current deferred tax assets:
Deferred revenues	$ 1,287	$ 1,280
Allowance for doubtful accounts	1,339	1,173
Inventory	865	396
Deferred compensation		477
Bonus accruals	1,163	82
Vacation accrual	219	184
Deferred rent	77	59
Warranty accrual	576	419
Installment sale note receivable		9
Other	(8)	8
Total current deferred tax assets	5,518	4,087
Non-current deferred tax assets:
Acquisition related costs	605	1,158
Deferred revenues	1,271	930
Deferred compensation	4,807	3,546
Deferred rent	1,025	1,070
Accrued expenses	444	299
Satellite network and other property	2,329
Installment sale note receivable		576
Foreign tax credit	4,398	1,646
Alternative minimum tax credit	325	329
Tax loss carryforwards and credits	5,089	1,913
Total non-current current deferred tax assets	20,293	11,467
Total deferred tax assets	25,811	15,554
Current deferred tax liabilities:
Accrued expenses	(482)
Total current deferred tax liabilities	(482)
Non-current deferred tax liabilities:
Satellite network and other property		(2,134)
Intangible Assets	(20,993)	(3,586)
Goodwill	(2,196)	(1,752)
Total non-current current deferred tax liabilities	(23,189)	(7,472)
Total deferred tax liabilities	(23,671)	(7,472)
Net deferred tax assets before valuation allowance	2,140	8,082
Less valuation allowance	(20,200)	(12,913)
Net deferred tax asset (liabilities)	(18,060)	(4,831)
Deferred tax assets, current	508	814
Deferred tax assets, non-current		1,827
Deferred tax liabilities, current	(128)
Deferred tax liabilities, non-current	$ (18,440)	$ (7,472)