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Consolidated Balance Sheets (USD $)
Jun. 30, 2012
Dec. 31, 2011
Assets    
Cash and cash equivalents $ 1,838,691 $ 2,403,364
Short term investments 1,050,000 1,255,056
Royalty receivables, net of reserves of $92,723 in both periods 537,251 334,050
Prepaid expenses and other current assets 50,962 169,634
Note receivable SPD Control Systems 0 150,000
Total current assets 3,476,904 4,312,104
Fixed assets, net 69,824 82,428
Note receivable, SPD Control Systems 0 0
Deposits and other assets 22,605 22,605
Total assets 3,569,333 4,417,137
Liabilities and Shareholders' Equity    
Accounts payable 174,451 96,146
Deferred revenue 156,250 25,000
Accrued expenses and other 142,585 188,793
Total liabilities 473,286 309,939
Commitments and Contingencies      
Shareholders' equity:    
Capital stock, par value $0.0001 per share; authorized 100,000,000 shares, issued and outstanding 18,907,555 and 18,544,355 shares, respectively 1,891 1,854
Additional paid-in capital 89,095,313 88,513,630
Accumulated deficit (86,001,157) (84,408,286)
Total shareholders' equity 3,096,047 4,107,198
Total liabilities and shareholders' equity $ 3,569,333 $ 4,417,137