Accrued Liabilities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Schedule of Accrued Liabilities [Line Items]
Royalties	$ 325,407	$ 235,772
Interest	309,828	248,763
Rent	145,073	78,797
Payroll	121,820	119,937
Miscellaneous	53,744	30,125
Total accrued liabilities	1,115,669	896,740
Redeemable Preferred Stock
Schedule of Accrued Liabilities [Line Items]
10% convertible preferred stock dividends	$ 159,797	$ 183,346