Restructuring Expenses - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		12 Months Ended
	May 06, 2014	Jun. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Restructuring Reserve [Abstract]
Reductions in company's worldwide workforce	20.00%			26.00%
Reduction of overall cost structure	2,000,000	2,000,000
Special charges for restructuring plan		$ 1.8	$ 5.6
Severance costs for affected employees		0.4	1.1
Other restructuring related costs		0.1	0.2
Non-cash stock based compensation expense		1.3
Restructuring plan expected to implemented primarily and result in negative cash impact		0.4
Annualized savings				16.0
Lease/rental termination charges for restructuring			3.3
Equipment and improvements write-offs due to lease/rental terminations		0.6	1.0
Restructuring liability included in accrued liabilities		1.5
Restructuring liability is included in deferred rent and other long term liabilities		$ 1.9