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Consolidated Statements of Stockholders' Equity - USD ($)
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Balances at Dec. 31, 2015 $ 12,578,000 $ 1,000 $ 41,735,000 $ (29,158,000)
Balances (in shares) at Dec. 31, 2015   12,868,943    
Shares issued for services ($3.40 per share) 150,000 $ 0 150,000 0
Shares issued for services ($3.40 per share) (in shares)   44,112    
Shares issued for services ($3.96 per share) 20,000 $ 0 20,000 0
Shares issued for services ($3.96 per share) (in shares)   5,000    
Shares issued for services ($4.85 per share) 24,000 $ 0 24,000 0
Shares issued for services ($4.85 per share) (in shares)   5,000    
Shares issued upon exercise of warrants ($2.20 per share) 0 $ 0 0 0
Shares issued upon exercise of warrants ($2.20 per share) (in shares)   60,883    
Share based compensation 645,000 $ 0 645,000 0
Net loss (11,173,000) 0 0 (11,173,000)
Balances at Dec. 31, 2016 2,244,000 $ 1,000 42,574,000 (40,331,000)
Balances (in shares) at Dec. 31, 2016   12,983,938    
Shares issued in rights offering ($3.03 per share) 7,258,000 $ 1,000 7,257,000 0
Shares issued in rights offering ($3.03 per share) (in shares)   2,395,471    
Warrants issued in rights offering ($0.97 per warrant) 2,324,000 $ 0 2,324,000 0
Issuance costs of rights offering (915,000) 0 (915,000) 0
Shares issued in payment of accrued compensation ($3.60 per share) 490,000 $ 0 490,000 0
Shares issued in payment of accrued compensation ($3.60 per share) (in shares)   136,110    
Shares issued for services ($4.85 per share) 24,000 $ 0 24,000 0
Shares issued for services ($4.85 per share) (in shares)   5,000    
Shares issued for services ($3.50 per share) 18,000 $ 0 18,000 0
Shares issued for services ($3.50 per share) (in shares)   5,000    
Shares issued for 2017 board services ($3.60 per share) 300,000 $ 0 300,000 0
Shares issued for 2017 board services ($3.60 per share) (In shares)   83,334    
Share based compensation 369,000 $ 0 369,000 0
Net loss (9,680,000) 0 0 (9,680,000)
Balances at Dec. 31, 2017 $ 2,432,000 $ 2,000 $ 52,441,000 $ (50,011,000)
Balances (in shares) at Dec. 31, 2017   15,608,853