Annual report pursuant to Section 13 and 15(d)

Share-based Payments - Summary of Stock Options Activity (Details)

v3.8.0.1
Share-based Payments - Summary of Stock Options Activity (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Number of Shares, Beginning 259,000 220,500
Number of Shares, Granted 38,500
Number of Shares, Exercised
Number of Shares, Forfeited (4,000)
Number of Shares, Cancelled/Expired
Number of Shares, Ending 255,000 259,000
Number of Shares, Exercisable 250,334 239,167
Weighted Average Exercise Price, Beginning $ 4.23 $ 4.38
Weighted Average Exercise Price, Granted 3.40
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited 3.25
Weighted Average Exercise Price, Cancelled/Expired
Weighted Average Exercise Price, Ending 4.25 4.23
Weighted Average Exercise Price, Exercisable $ 4.27 $ 4.31
Weighted Average Remaining Contractual Term, Beginning 3 years 18 days 3 years 9 months 22 days
Weighted Average Remaining Contractual Term, Granted 0 years 4 years 5 months 5 days
Weighted Average Remaining Contractual Term, Exercised 0 years 0 years
Weighted Average Remaining Contractual Term, Forfeited 3 years 7 months 17 days 0 years
Weighted Average Remaining Contractual Term, Cancelled/Expired 0 years 0 years
Weighted Average Remaining Contractual Term, Ending 2 years 7 days 3 years 18 days
Weighted Average Remaining Contractual Term, Exercisable 1 year 11 months 26 days 2 years 11 months 1 day
Aggregate Intrinsic Value, Beginning $ 20,100
Aggregate Intrinsic Value, Ending 20,100
Aggregate Intrinsic Value, Exercisable $ 20,100