Inventory - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Inventory [Line Items]
Inventory	$ 250	$ 2,253
Adjustment for surplus and obsolete inventories	801
Voyce Operations [Member]
Inventory [Line Items]
Inventory impairment based on estimated salvage values	3,800
Prepaid Expenses and Other Current Assets [Member]
Inventory [Line Items]
Inventory	2,600
Pet Health Monitoring [Member]
Inventory [Line Items]
Inventory	$ 250	2,300
Inventory, finished goods		1,900
Inventory, raw materials		$ 358