Variable Interest Entity ("VIE") (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 3,899	$ 8,360	$ 7,303	$ 8,779
Prepaid expenses and other current assets	73		105
Total current assets	3,972		7,408
Non-current assets	293		295
Total assets	7,172		7,703
Revenue
General and administrative expenses	(287)	(463)
Operating loss	(287)	(463)
Three Lions Entertainment, LLC ("Three Lions")
Current assets:
Cash and cash equivalents	2,568
Prepaid expenses and other current assets	9
Total current assets	2,577
Non-current assets	435
Total assets	3,012
Accounts payable and other current liabilities	82
Total liabilities	82
Net assets	2,930
Revenue
General and administrative expenses	(405)
Operating loss	(405)
Net loss	$ (405)