Accrued Expenses (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Payroll and related costs	$ 5,200	$ 18,100
Professional and consulting fees	42,700	77,400
Royalties	932,600	858,300
Stock payment guarantee liabilities	446,100	443,200
Other	101,100	115,800
Total	$ 1,527,700	$ 1,512,800