Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies [Abstract]

Schedule of carrying and estimated fair values of financial instruments

The carrying amounts and estimated fair values of other financial instruments (all are liabilities) at December 30, 2012 and 2011, are as follows (in thousands):

	December 31
	2012					2011
	Carrying Amount			Estimated Fair  Value		Carrying Amount			Estimated Fair  Value
Promissory notes	$	3,280		$	3,248	$	830		$	816
Zero-coupon promissory notes		230			225		230			225
Debentures		537			515		549			557
Senior promissory notes		1,771			1,757		1,759			1,786
Long-term promissory notes		125			120		2,600			2,648
Less unamortized discount		(80	)		—		(361	)		—
	$	5,863		$	5,865	$	5,607		$	6,032

Schedule of assumptions for options and warrants

The following table lists the assumptions utilized in applying the Black-Scholes valuation model for options and warrants.

	Year ended December 31
	2012			2011
Expected volatility		160	%		160	%
Expected life (in years) of options		5			1-10
Expected life (in years) of warrants		2-3			3-10
Risk-free interest rate range, options		0.64	%		0.10-2.03	%
Risk-free interest rate range, warrants		0.24-0.57	%		0.62-1.97	%
Expected dividend yield		0	%		0	%

Computation of basic loss per common share

The following table sets forth the computation of basic loss per common share (amounts in thousands, except per share data):

	Year ended December 31,
	2012			2011
Numerator:
Net loss attributable to common stockholders	$	(6,990	)	$	(14,088	)
Denominator:
Weighted average common shares		59,270			57,031
Basic loss per share attributable to common stockholders	$	(0.12	)	$	(0.25	)