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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Aug. 08, 2018
Income Taxes Disclosure [Line Items]          
Income tax provision (benefit) from continuing operations $ 506,000 $ (36,000) $ 205,000 $ 135,000  
Discrete income tax provision $ 22,000        
Annual effective tax rate 109.80% (3.00%)      
Annual statutory tax rates 21.00%        
Total unrecognized tax benefits $ 1,016,000 $ 983,000 $ 1,016,000 $ 983,000  
Internal Revenue Service [Member]          
Income Taxes Disclosure [Line Items]          
Audit adjustments tax period     2015    
Internal Revenue Service [Member] | Subsequent Event [Member] | Tax Year 2015 [Member]          
Income Taxes Disclosure [Line Items]          
Change in tax liability due to examination of its 2015 tax return         $ 0
Italian Income Tax [Member]          
Income Taxes Disclosure [Line Items]          
Audit adjustments tax period     2013    
Romania Income Tax [Member] | Minimum [Member]          
Income Taxes Disclosure [Line Items]          
Audit adjustments tax period     2012    
Romania Income Tax [Member] | Maximum [Member]          
Income Taxes Disclosure [Line Items]          
Audit adjustments tax period     2016