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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cash flows from operating activities:      
Net loss $ (5,845,087) $ (3,063,601) $ (4,134,068)
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation and amortization 45,212 34,963 39,857
Stock-based compensation 2,719,380 878,578 702,837
Bad debts 81,198      
Recovery of uncollectible receivables       (70,000)
Changes in assets and liabilities:      
Royalty receivables (260,042) (354,268) 116,127
Prepaid expenses and other current assets 94,544 (107,218) (5,037)
Accounts payable and accrued expenses (80,064) (67,547) (2,300)
Net cash used in operating activities (3,244,859) (2,679,093) (3,352,584)
Cash flows from investing activities:      
Purchases of fixed assets (50,536) (11,576) (12,517)
Purchase of investments (24,009) (3,797,865) (2,255,056)
Proceeds from sale of investment       1,000,000
Note and interest receivable on SPD Control Systems    224,903   
Net cash used in investing activities (74,545) (3,584,538) (1,267,573)
Cash flows from financing activities:      
Net proceeds from issuances of common stock and exercise of options and warrants 795,294 12,250,500 65,977
Net cash provided by financing activities 795,294 12,250,500 65,977
Net (decrease) increase in cash and cash equivalents (2,524,110) 5,986,869 (4,554,180)
Cash and cash equivalents at beginning of year 8,390,233 2,403,364 6,957,544
Cash and cash equivalents at end of year 5,866,123 8,390,233 2,403,364
Non Cash Financing and Investing Activities:      
Cashless Exercise of Stock Options $ 27,675    $ 276,750