Annual report pursuant to Section 13 and 15(d)

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details)

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QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
 3 Months Ended 12 Months Ended
Jul. 31, 2016
Dec. 31, 2016
Sep. 30, 2016
 [1]
Jun. 30, 2016
 [2]
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Quarterly results of operations [Abstract]                        
Revenues   $ 54,203 $ 57,142 $ 48,854 $ 52,200 $ 60,545 $ 66,938 $ 59,350 $ 55,143 $ 212,399 $ 241,976 $ 289,643
Gross profit   7,652 8,905 11,574 11,771 11,257 16,035 14,594 15,123 39,902 57,009 43,503
Net Income   $ (847) $ 2,799 $ 10,252 $ 7,224 $ 1,122 $ 5,318 $ 6,374 $ 5,784 $ 19,428 $ 18,598 $ 15,571
Basic EPS (in dollars per share)   $ (0.03) [3] $ 0.12 [3] $ 0.42 [3] $ 0.30 [3] $ 0.05 [3] $ 0.21 [3] $ 0.26 [3] $ 0.24 [3] $ 0.80 [3] $ 0.76 [3] $ 0.64
Diluted EPS (in dollars per share)   $ (0.03) [3] $ 0.11 [3] $ 0.41 [3] $ 0.29 [3] $ 0.05 [3] $ 0.21 [3] $ 0.25 [3] $ 0.23 [3] $ 0.78 [3] $ 0.74 [3] $ 0.63
Bargain purchase gain from acquisition                   $ 11,549 $ 0 $ 0
Shares issued by AMAK (in shares) 4                      
Gain from equity issuance by AMAK                   $ 3,168 $ 0 $ 0
[1] As discussed in Note 11, in July 2016 AMAK issued four million shares. As a result of the equity issuance, our share of the net assets of AMAK increased approximately $3.2 million which we recognized as a gain.
[2] On May 2, 2016, we purchased the idle BASF facility adjacent to our TC facility. As discussed in Note 2, we recorded a bargain purchase gain of approximately $11.5 million on the transaction.
[3] Basic and diluted earnings per share are computed independently for each of the quarters presented based on the weighted average number of common shares outstanding during that period. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.