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Statement of Stockholders' Equity - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Balances at Dec. 31, 2013 $ 3,788,000 $ 1,000 $ 17,751,000 $ (13,964,000)
Balances (in shares) at Dec. 31, 2013   8,810,674    
Shares issued in registered direct offering ($8.00 per share) 6,500,000 $ 0 6,500,000 0
Shares issued in registered direct offering ($8.00 per share) (in shares)   812,500    
Issuance costs of registered direct offering (812,000) $ 0 (812,000) 0
Share based payments of warrants 92,000 0 92,000 0
Shares issued for services ($5.97 per share) 222,000 $ 0 222,000 0
Shares issued for services ($5.97 per share) (in shares)   21,625    
Shares issued upon exercise of options ($2.20 per share) 35,000 $ 0 35,000 0
Shares issued upon exercise of options ($2.20 per share) (in shares)   23,337    
Shares issued upon exercise of options ($4.88 per share) 65,000 $ 0 65,000 0
Shares issued upon exercise of options ($4.88 per share) (in shares)   13,340    
Share based compensation 365,000 $ 0 365,000 0
Share based compensation (in shares)   0    
Net loss (7,296,000) $ 0 0 (7,296,000)
Balances at Dec. 31, 2014 2,959,000 $ 1,000 24,218,000 (21,260,000)
Balances (in shares) at Dec. 31, 2014   9,681,476    
Shares issued in underwritten offering ($5.85 per share) 17,491,000 $ 0 17,491,000 0
Shares issued in underwritten offering ($5.85 per share) (in shares)   2,990,000    
Issuance costs of underwritten offering (1,212,000) $ 0 (1,212,000) 0
Issuance costs of underwritten offering (in shares)   0    
Shares issued for services ($5.97 per share) 137,000 $ 0 137,000 0
Shares issued for services ($5.97 per share) (in shares)   23,034    
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 upon exercise of options ($2.20 per share) 284,000 $ 0 284,000 0
Shares issued upon exercise of options ($2.20 per share) (in shares)   166,536    
Shares issued upon exercise of options ($4.88 per share) 0 $ 0 0 0
Shares issued upon exercise of options ($4.88 per share) (in shares)   2,813    
Shares issued upon exercise of options ($5.21 per share) 0 $ 0 0 0
Shares issued upon exercise of options ($5.21 per share) (in shares)   84    
Share based compensation 797,000 $ 0 797,000 0
Share based compensation (in shares)   0    
Net loss (7,898,000) $ 0 0 (7,898,000)
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