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Statements of Cash Flows - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Cash flows from operating activities:    
Net loss $ (2,379,000) $ (2,589,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Common stock issued for services 87,000 47,000
Share based payments 143,000 168,000
Depreciation and amortization 60,000 42,000
Amortization of right of use asset 48,000 0
Payments of lease liabilities (35,000) 0
Abandonment and impairment of capitalized patents pending 0 65,000
Other 0 (4,000)
Change in operating assets and liabilities:    
Accounts receivable (216,000) 0
Prepaid expenses and other costs 223,000 29,000
Accounts payable and accrued liabilities (175,000) 35,000
Accrued compensation and taxes 49,000 (516,000)
Billings on uncompleted contracts in excess of costs (72,000) 0
Net cash used in operating activities (2,267,000) (2,723,000)
Cash flows from investing activities:    
Acquisition of fixed assets (28,000) (11,000)
Disbursements for patents and other intangible assets (105,000) (370,000)
Net cash used in investing activities (133,000) (381,000)
Cash flows from financing activities:    
Proceeds from issuance of units of common stock and warrants for cash, net of offering costs 8,667,000 0
Net cash provided by financing activities 8,667,000 0
Net increase (decrease) in cash and cash equivalents 6,267,000 (3,104,000)
Cash and cash equivalents, beginning of period 1,259,000 10,985,000
Cash and cash equivalents, end of period $ 7,526,000 $ 7,881,000