11. Stockholders' deficit (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Mar. 15, 2013	Dec. 31, 2012	Jun. 30, 2012
Common Stock, Shares Authorized	100,000,000	500,000,000	100,000,000	50,000,000
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common Stock, Shares, Issued	27,234,279		27,234,279
Stock Issued During Period, Shares, Issued for Cash	13,521,568
Stock Issued During Period, Value, New Issues (in Dollars)	$ 1,062,831
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings	7,187,711
Incremental Common Shares Attributable to Conversion of Debt Securities	6,525,000