Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts receivable	$ 2,380	$ 2,380
Amount current replacement cost of inventory costs exceeded book value		$ 2,462
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	9,988	9,988
Preferred stock, shares issued		0
Preferred stock, shares outstanding		0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	60,000	60,000
Common stock, shares issued	23,888	23,888
Common stock, shares outstanding	23,794	23,794
Treasury stock, shares	94	94
Series B Junior Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	400	400