Condensed Consolidated Statement of Changes in Stockholder's Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Series D-1 Preferred Stock [Member]
Stock Transactions, Parenthetical Disclosures [Abstract]
Offering expenses	$ 76
Series D-2 Preferred Stock [Member]
Stock Transactions, Parenthetical Disclosures [Abstract]
Offering expenses	114
Series D-2 Preferred Stock for Cash [Member]
Stock Transactions, Parenthetical Disclosures [Abstract]
Offering expenses	$ 115