Condensed Statement of Changes in Shareholder's Equity (Parenthetical)
|3 Months Ended|
Mar. 31, 2019
|Statement of Stockholders' Equity [Abstract]|
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef