CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Redeemable Convertible Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Redeemable Convertible Preferred Stock, shares authorized	1,000,000,000	1,000,000,000
Redeemable Convertible Preferred Stock, shares issued	8,200,000	8,200,000
Redeemable Convertible Preferred Stock, shares outstanding	8,200,000	8,200,000
Redeemable Convertible Preferred Stock, liquidation preference	$ 39,570	$ 39,570
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	17,552,139	17,166,997
Common Stock, shares outstanding	15,922,321	15,537,179
Treasury Stock, shares at cost	1,629,818	1,629,818