Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2018
Dec. 31, 2017
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 20,500,000 20,500,000
Common stock, shares issued 7,307,000 7,301,000
Common stock, shares outstanding 7,307,000 7,301,000