Quarterly report pursuant to Section 13 or 15(d)

Equity - Summary of Option Activities (Details)

v3.8.0.1
Equity - Summary of Option Activities (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Number of Shares    
Number of shares outstanding, beginning of period 1,345,000  
Number of shares granted 230,000  
Number of shares outstanding, end of period 1,575,000 1,345,000
Number of shares exercisable, end of period 85,000  
Weighted Average Grant Date Fair Value    
Weighted average grant date fair value, outstanding, beginning of period (in dollars per share) $ 1.93  
Weighted average grant date fair value, granted (in dollars per share) 1.32  
Weighted average grant date fair value, outstanding, end of period (in dollars per share) 1.81 $ 1.93
Weighted average grant date fair value, exercisable (in dollars per share) 1.15  
Weighted Average Exercise Price    
Weighted average exercise price, outstanding balance (in dollars per share) 3.50  
Weighted average exercise price, granted (in dollars per share) 1.76  
Weighted average exercise price, outstanding balance (in dollars per share) 3.25 $ 3.50
Weighted average exercise price, exercisable (in dollars per share) $ 0.20  
Weighted average remaining contractual term (in years), outstanding 9 years 3 months 7 days 9 years 26 days
Weighted average remaining contractual term (in years), exercisable 2 years 5 months  
Aggregate intrinsic value, outstanding balance $ 80 $ 83
Aggregate intrinsic value, exercisable $ 80