Stockholders' Equity (Details 6) - Consultant Plan [Member] - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reserved but unissued shares under the Plan, beginning of year	99,159	83,633
Increases in the number of authorized shares under the Consultant Plan	110,546	25,526
Stock grants	(10,000)	(10,000)
Reserved but unissued shares under the Plan, end of year	199,705	99,159