Stock Options (Tables)
|3 Months Ended|
Mar. 31, 2018
|Disclosure of Compensation Related Costs, Share-based Payments [Abstract]|
|Schedule of Stock Options Outstanding and Exercisable||
Stock options outstanding and exercisable as of March 31, 2018 were:
Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.
Reference 1: http://www.xbrl.org/2003/role/presentationRef