Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Changes in Accumulated Other Comprehensive Income, Net of Income Taxes (Detail)

v3.7.0.1
Stockholders' Equity - Changes in Accumulated Other Comprehensive Income, Net of Income Taxes (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ 810  
Other comprehensive income (loss) before reclassifications 45  
Amounts reclassified from accumulated other comprehensive income (loss) 0  
Net current-period other comprehensive income (loss) 45 $ 727
Ending balance 855  
Unrealized gains and (losses) of available-for-sale securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (255)  
Other comprehensive income (loss) before reclassifications 47  
Amounts reclassified from accumulated other comprehensive income (loss) 0  
Net current-period other comprehensive income (loss) 47  
Ending balance (208)  
Foreign currency translation [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 1,065  
Other comprehensive income (loss) before reclassifications (2)  
Amounts reclassified from accumulated other comprehensive income (loss) 0  
Net current-period other comprehensive income (loss) (2)  
Ending balance $ 1,063