Income Taxes - Schedule of Provision for Income Taxes (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Taxes at the U.S. statutory rate	34.00%	34.00%
Increase (decrease) resulting from:
Tax credits	4.50%
State income tax	0.60%	0.70%
International operations	10.30%	(21.30%)
Incentive stock options	(0.60%)	1.00%
Valuation allowance	(118.00%)	(8.30%)
Expiration of state NOLs	(6.20%)	22.10%
Other, net	3.70%	0.40%
Total	(71.70%)	28.60%