Consolidated Balance Sheets - Parenthetical - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common Stock, Shares, Outstanding	7,854,736	7,776,164
Treasury Stock, Shares	3,798,052	3,790,308