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Consolidated Balance Sheets (USD $)
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 3,637,975 $ 5,866,123
Short term investments 8,080,845 5,076,930
Royalty receivables, net of reserves of $173,921 in 2014 and 2013 1,221,627 867,162
Prepaid expenses and other current assets 76,593 135,080
Total current assets 13,017,040 11,945,295
Fixed assets, net 151,379 64,365
Deposits and other assets 33,566 22,605
Total assets 13,201,985 12,032,265
Current liabilities:    
Accounts payable 71,411 56,603
Accrued expenses and other 186,189 80,725
Deferred revenue 16,250 25,000
Total current liabilities 273,850 162,328
Shareholders' equity:    
Common stock, par value $0.0001 per share; authorized 100,000,000 shares, issued and outstanding 23,124,465 and 23,109,665 shares for 2014 and 2013 2,392 2,311
Additional paid-in capital 109,594,372 105,584,606
Accumulated deficit (96,668,629) (93,716,980)
Total shareholders' equity 12,928,135 11,869,937
Total liabilities and shareholders' equity $ 13,201,985 $ 12,032,265