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Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period $ 80 $ 190 $ 132
Other comprehensive loss before reclassification adjustments (275) (109)  
Reclassification adjustment for realized gains on marketable securities included in net loss   (1)  
Total other comprehensive income (loss), net of tax (275) (110) 58
Balance at end of period (195) 80 190
Unrealized Gains and Losses on Available-for-Sale Marketable Securities      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period (58) 0 0
Other comprehensive loss before reclassification adjustments (36) (57)  
Reclassification adjustment for realized gains on marketable securities included in net loss   (1)  
Total other comprehensive income (loss), net of tax   (58) 0
Balance at end of period (94) (58) 0
Foreign Currency Translation Adjustments      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period 138 190 132
Other comprehensive loss before reclassification adjustments (239) (52)  
Reclassification adjustment for realized gains on marketable securities included in net loss   0  
Total other comprehensive income (loss), net of tax   (52) 58
Balance at end of period $ (101) $ 138 $ 190