Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Aug. 04, 2015	Sep. 30, 2015	Sep. 30, 2015
Discontinued Operations [Line Items]
Pretax gain on the disposal of the discontinued operations		$ 271,833	$ 271,833
Fiber Optic Licensing Division [Member]
Discontinued Operations [Line Items]
Sales price of fiber optic licensing operations	$ 1,000,000
Net cash proceeds from sale of fiber optic licensing operations	$ 848,000
Pretax gain on the disposal of the discontinued operations		272,000
Tax amount from gain loss of disposal of discontinued operations		(101,000)
Gain on sale, Net of tax		$ 171,000