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Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Consolidated Statements of Comprehensive Income (Loss)      
Net income (loss) $ (31,978) $ (66,940) $ (42,263)
Other comprehensive income (loss), net of tax      
Unrealized gain (loss) on available-for-sale securities (49) 51 34
Benefit (expense) for income taxes     11
Reclassifications from AOCI into net income   (65) (61)
Net unrealized loss on available-for-sale securities (49) (14) (16)
Minimum pension liability 15 (145) 125
Benefit (expense) for income taxes     (86)
Net minimum pension liability 15 (145) 39
Foreign currency translation (87) 149 (1,322)
Benefit (expense) for income taxes     (53)
Reclassifications from AOCI into net income   (3,142)  
Net foreign currency translation (87) (2,993) (1,375)
Other comprehensive income (loss), net of tax (121) (3,152) (1,352)
Comprehensive income (loss) $ (32,099) $ (70,092) $ (43,615)