Restatement and Revisions on the Condensed Consolidated Balance Sheets (Parenthetical) (Detail) (USD $)	Mar. 31, 2013		Dec. 31, 2012
Preferred stock, par value	$ 0.0025	[1]	$ 0.0025	[2]
Common stock, par value	$ 0.0025	[1]	$ 0.0025	[2]

[1] Restated and Revised, see Notes 2 and 7

[2] Revised, see Note 2