Commitments and Contingencies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016 USD ($) patent
Loss Contingencies [Line Items]
Losses up to per occurrence related to product liability, automotive, workers' compensation and general liability	$ 250,000
Liability recorded for such risk insurance reserves	1,421,000
Aggregate vendors and insurers letters of credit related to product purchases and insurance coverage of product liability, workers' compensation and general liability	5,559,000
Group health claims up to annual stop loss limit per participant	$ 200,000
Annual group health insurance claims in excess of expected claims	125.00%
Liability recorded for such group health insurance reserves	$ 1,566,000
Patent Infringement from Minute Key Inc. [Member]
Loss Contingencies [Line Items]
Number of patents found not infringed | patent	2
Maximum [Member]
Loss Contingencies [Line Items]
Occurrences in excess for purchased catastrophic coverage	$ 40,000,000
Minimum [Member]
Loss Contingencies [Line Items]
Occurrences in excess for purchased catastrophic coverage	$ 250,000