Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Stockholders' deficit
Common stock, shares par value	$ 0.001	$ 0.001
Common stock, shares authorized	275,000,000	275,000,000
Common stock, shares issued	24,395,037	24,982,537
Common stock, shares outstanding	21,167,537	21,167,537
Treasury stock shares	3,815,000	3,815,000
Series A Convertible Preferred Stock [Member]
Stockholders' deficit
Preferred stock, shares par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series B Convertible Preferred Stock [Member]
Stockholders' deficit
Preferred stock, shares par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	64,000	64,000
Preferred stock, shares outstanding	64,000	64,000