Organization and Summary of Significant Accounting Policies - Weighted Average Securities Excluded from Diluted Net Loss Per Share (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average diluted securities excluded from diluted net loss per share	12,959	13,970	21,327
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average diluted securities excluded from diluted net loss per share	12,959	13,970	11,338
Convertible Subordinated Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average diluted securities excluded from diluted net loss per share			9,989