Consolidated Balance Sheets (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 7,030,474	$ 8,390,233
Short term investments	5,059,456	5,052,921
Royalty receivables, net of reserves of $92,723 in 2013 and 2012	839,169	688,318
Prepaid expenses and other current assets	64,162	201,949
Total current assets	12,993,261	14,333,421
Fixed assets, net	72,917	59,041
Deposits and other assets	22,605	22,605
Total assets	13,088,783	14,415,067
Current liabilities:
Accounts payable	111,272	72,269
Accrued expenses and other current liabilities	128,567	145,123
Deferred revenue	127,500	25,000
Total current liabilities	367,339	242,392
Commitments and Contingencies
Shareholders' equity:
Capital stock, par value $0.0001 per share; authorized 100,000,000 shares, issued and outstanding 22,916,095 and 22,646,782 shares for 2013 and 2012	2,293	2,265
Additional paid-in capital	102,559,702	101,642,297
Accumulated deficit	(89,840,551)	(87,471,887)
Total shareholders' equity	12,721,444	14,172,675
Total liabilities and shareholders' equity	$ 13,088,783	$ 14,415,067

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Also includes aggregate carrying amount, as of the balance sheet date, of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed in the balance sheet. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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