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Condensed Statements of Cash Flows (USD $)
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Cash flows from operating activities:    
Net loss $ (4,994,000) $ (4,125,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Common stock issued for services 166,000 181,000
Share based payments 247,000 110,000
Depreciation 181,000 154,000
Abandonment of capitalized patents 67,000 4,000
Deferred rent 5,000 (2,000)
Change in operating assets and liabilities:    
Prepaid expenses (31,000) (94,000)
Accounts payable 25,000 (71,000)
Accrued compensation 41,000 538,000
Net cash used in operating activities (4,293,000) (3,305,000)
Cash flows from investing activities:    
Acquisition of fixed assets (77,000) (170,000)
Disbursements for patents and other intangible assets (880,000) (602,000)
Net cash used in investing activities (957,000) (772,000)
Cash flows from financing activities:    
Proceeds from issuance of common stock for cash 5,780,000 39,000
net of offering costs 59,000 0
Net cash provided by financing activities 5,839,000 39,000
Net increase (decrease) in cash and cash equivalents 589,000 (4,038,000)
Cash and cash equivalents, beginning of period 2,688,000 8,027,000
Cash and cash equivalents, end of period $ 3,277,000 $ 3,989,000