Notes and advances payable (Parenthetical) (Detail)						12 Months Ended
	Sep. 29, 2012 Note payable interest at 12.0% due March 2013	Dec. 31, 2012 Officers directors and affiliates Notes and advances payable, interest at 8.0%, due on demand	Dec. 31, 2011 Officers directors and affiliates Notes and advances payable, interest at 8.0%, due on demand	Dec. 31, 2012 Officers directors and affiliates Notes and advances payable, interest at 9.7%, due on demand	Dec. 31, 2011 Officers directors and affiliates Notes and advances payable, interest at 9.7%, due on demand	Dec. 31, 2012 Officers directors and affiliates Note payable interest at 12.0% due March 2013	Dec. 31, 2011 Officers directors and affiliates Note payable interest at 12.0% due March 2013	Dec. 31, 2012 Unrelated Parties Note payable interest at 12.0% due March 2013	Dec. 31, 2011 Unrelated Parties Note payable interest at 12.0% due March 2013	Dec. 31, 2012 Unrelated Parties Note Payable interest at 12.0% due March 2012	Dec. 31, 2011 Unrelated Parties Note Payable interest at 12.0% due March 2012
Notes Payable [Line Items]
Notes and advances payable, interest rate	12.00%	8.00%	8.00%	9.70%	9.70%	12.00%	12.00%	12.00%	12.00%	12.00%	12.00%
Notes and advances payable, maturity period						2013-03	2013-03	2013-03	2013-03	2012-03	2012-03