Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Balance     $ 5,318    
Net proceeds from sale of common stock     1,926 $ 5,141  
Stock-based compensation expense     82    
Net loss $ (1,106) $ (1,503) (2,223) $ (2,723) $ 4,341
Balance $ 5,103   $ 5,103   $ 5,318
Common Stock [Member]          
Balance, shares     5,344,372    
Balance     $ 5    
Net proceeds from sale of common stock, shares     500,000    
Net proceeds from sale of common stock     $ 7,375    
Stock-based compensation expense, shares        
Stock-based compensation expense        
Net loss        
Balance, shares 5,844,372   5,844,372   5,344,372
Balance $ 6   $ 6   $ 5
Additional Paid in Capital [Member]          
Balance     33,099    
Net proceeds from sale of common stock     1,925    
Stock-based compensation expense     82    
Net loss        
Balance 35,106   35,106   33,099
Accumulated deficit [Member]          
Balance     (27,786)    
Net proceeds from sale of common stock        
Stock-based compensation expense        
Net loss     (2,223)    
Balance $ (30,009)   $ (30,009)   $ (27,786)