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 $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Sep. 30, 2012
Restated - see Note 2 [Member]
Jun. 30, 2012
Restated - see Note 2 [Member]
Mar. 31, 2012
Restated - see Note 2 [Member]
Dec. 31, 2011
Restated - see Note 2 [Member]
Sep. 30, 2011
Restated - see Note 2 [Member]
Jun. 30, 2011
Restated - see Note 2 [Member]
Mar. 31, 2011
Restated - see Note 2 [Member]
Dec. 31, 2011
Restated - see Note 2 [Member]
Dec. 31, 2010
Restated - see Note 2 [Member]
Quarterly results of operations [Abstract]                          
Revenues $ 49,936 $ 222,858 [1] $ 199,517 [2] $ 139,110 [2] $ 54,278 $ 61,849 $ 56,795 $ 61,478 $ 61,545 $ 42,738 $ 33,756    
Gross profit 6,906 30,758 [1] 25,917 [2] 17,215 [2] 8,767 8,367 6,718 10,161 9,216 3,248 3,292    
Net income (loss) $ 1,850 $ 10,321 [1] $ 13,884 [2] $ 2,075 [2] $ 3,004 $ 3,472 $ 1,995 $ 3,823 $ 10,153 $ (95) $ 3    
Basic EPS (in dollars per share) $ 0.08 $ 0.43 [1] $ 0.58 [2] $ 0.09 [2] $ 0.13 $ 0.14 $ 0.08 $ 0.16 $ 0.42 $ 0.00 $ 0.00 $ 0.58 $ 0.09
Diluted EPS (in dollars per share) $ 0.08 $ 0.42 [1] $ 0.57 [2] $ 0.09 [2] $ 0.12 $ 0.14 $ 0.08 $ 0.15 $ 0.42 $ 0.00 $ 0.00 $ 0.57 $ 0.09
[1] Restated - see Note 3
[2] Restated - see Note 2