Annual report pursuant to Section 13 and 15(d)

Earnings Per Share and Stock Repurchase Plan - Computation of Basic and Diluted Earnings Per Share (Details)

v3.6.0.2
Earnings Per Share and Stock Repurchase Plan - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jul. 30, 2015
Numerator:                        
Net income (loss) $ (3,555,000) $ 541,000 $ 5,540,000 $ 989,000 $ (14,667,000) $ (12,137,000) $ 1,357,000 $ 83,000 $ 3,515,000 $ (25,364,000) $ 15,320,000  
Less: distributed loss / distributed and undistributed income (unvested restricted stock)                 30,000 84,000 104,000  
Net income (loss) attributable to common shareholders                 $ 3,485,000 $ (25,448,000) $ 15,216,000  
Denominator (basic and fully diluted):                        
Denominator for basic earnings per share-weighted-average shares                 14,631 14,546 14,505  
Basic and fully diluted earnings (loss) per share—common shareholders $ (0.24) $ 0.04 $ 0.37 $ 0.07 $ (1.01) $ (0.84) $ 0.09 $ 0.00 $ 0.24 $ (1.75) $ 1.05  
Stock repurchase program, authorized amount                       $ 10,000,000.0