The Company and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013 Subsidiaries
Accounting Policies [Line Items]
Number of consolidated subsidiaries	7
Period of maturity on conversion of cash equivalents	90 days
NAVB Stock [Member]
Accounting Policies [Line Items]
Number of common stock include in Short-term investments	95,000
Minimum [Member]
Accounting Policies [Line Items]
Estimated useful lives of the assets	3 years
Maximum [Member]
Accounting Policies [Line Items]
Estimated useful lives of the assets	5 years