Notes and Advances Payable (Tables)

12 Months Ended

Dec. 31, 2012

Notes and advances payable

Notes and advances payable consist of the following as of December 31, 2011 and 2012:

	2011		2012
Officers, directors and affiliates:
Notes and advances payable, interest at 8.0%, due on demand	$	24,319	$	12,882
Notes and advances payable, interest at 9.7%, due on demand		85,000		85,000
Note payable, interest at 12.0%, due March 2013		—		150,000
Collateralized note payable (see below)		—		261,109
Total officers, directors and affiliates		109,319		508,991
Unrelated parties:
Note payable, interest at 12.0%, due March 2012		250,000		—
Notes payable, interest at 12.0%, due March 2013		—		250,000
Total unrelated parties		250,000		250,000
Total notes and advance payable	$	359,319	$	758,991