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Condensed Statements of Cash Flows - USD ($)
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows from operating activities:    
Net loss $ (8,866,000) $ (5,340,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Common stock issued for services 144,000 110,000
Share based payments 492,000 576,000
Depreciation and amortization 139,000 159,000
Abandonment and impairment of capitalized patents pending 1,971,000 5,000
Deferred rent (13,000) (9,000)
Change in operating assets and liabilities:    
Prepaid expenses (287,000) (125,000)
Costs on uncompleted contracts in excess of billings (144,000) 0
Accounts payable 89,000 117,000
Accrued compensation (260,000) (293,000)
Billings on uncompleted contracts in excess of costs 318,000 0
Net cash used in operating activities (6,417,000) (4,800,000)
Cash flows from investing activities:    
Acquisition of fixed assets (176,000) (37,000)
Disbursements for patents and other intangible assets (834,000) (888,000)
Net cash used in investing activities (1,010,000) (925,000)
Cash flows from financing activities:    
Proceeds from issuance of common stock for cash, net of offering costs 0 16,279,000
Proceeds from exercise of stock options 0 284,000
Net cash provided by financing activities 0 16,563,000
Net increase (decrease) in cash and cash equivalents (7,427,000) 10,838,000
Cash and cash equivalents, beginning of period 10,985,000 1,845,000
Cash and cash equivalents, end of period $ 3,558,000 $ 12,683,000