Stockholders' Deficit, Option Plans, and Employee Benefit Plan (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Deficit, Option Plans, and Employee Benefit Plan [Abstract]

Restricted Stock Activities

A summary of restricted stock activities for the years ended December 31, 2019, 2018 and 2017 is as follows:

	December 31,
	2019			2018			2017
	(number of shares)
Outstanding at beginning of year		3,904,550			3,948,199			--
Granted		--			--			3,972,007
Forfeited		(11,904	)		(43,648	)		(23,808	)
Outstanding at end of year		3,892,646			3,904,550			3,948,199