Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions (Details Textual)

v3.8.0.1
Related Party Transactions (Details Textual) - Enovation Controls [Member]
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Officer
Apr. 01, 2017
USD ($)
Related Party Transaction [Line Items]    
Due from entity $ 324 $ 815
Due to entity $ 359 968
Inventory Transactions [Member]    
Related Party Transaction [Line Items]    
Number of officers purchasing and selling inventory | Officer 1  
Total sales to entity $ 861 756
Total purchases from entity/related party 1,751 2,448
'Transition Services Agreement [Member]    
Related Party Transaction [Line Items]    
Total purchases from entity/related party $ 22 411
Maximum transition services period for specified services 1 year  
'Transition Services Agreement [Member] | Miscellaneous Expense, Net [Member]    
Related Party Transaction [Line Items]    
Sales $ 39 650
Related costs incurred $ 39 $ 650