Restatement and Revisions Consolidated Statements of Cash Flows (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Net cash provided by (used in) operating activities	$ 1,161	[1]	$ (1,638)
Net cash provided by (used in) investing activities	3,080	[1]	(7,149)
Previously Reported
Net cash provided by (used in) operating activities	1,703	[2]
Net cash provided by (used in) investing activities	3,622	[2]
Previously Reported | OverStatement
Net cash provided by (used in) operating activities	1,100
Net cash provided by (used in) investing activities	$ 1,100

[1] Restated and Revised, see Note 2

[2] The Company’s condensed consolidated statement of cash flows for the three months ended March 31, 2013 was previously restated for amounts related to purchases of property and equipment that were inadvertently overstated resulting in the overstatement of cash used in investing activities by $1.1 million and the overstatement of net cash provided by operating activities by the same amount.