Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.8.0.1
Basis of Presentation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Noncontrolling Interest [Line Items]          
Net income (loss) $ 2,348 $ 3,942 $ 3,791 $ 8,097  
Total shareholders’ equity $ 136,316   $ 136,316   $ 132,398
Noncurrent deferred tax assets         21,600
Accounting Standards Update 2015-07          
Noncontrolling Interest [Line Items]          
Current deferred tax assets         5,600
Previously Reported          
Noncontrolling Interest [Line Items]          
Noncurrent deferred tax assets         16,000
Ukraine          
Noncontrolling Interest [Line Items]          
Net sales as a percentage of revenue (as a percentage) 230.00% 230.00% 230.00% 220.00%  
Noncontrolling Interest          
Noncontrolling Interest [Line Items]          
Net income (loss)     $ (625) $ (700)  
Total shareholders’ equity $ 661   $ 661   $ 1,286