Quarterly report pursuant to Section 13 or 15(d)

Nature Of Operations And Summary Of Significant Accounting Policies (Details)

v3.10.0.1
Nature Of Operations And Summary Of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 11, 2018
Jun. 30, 2018
Jun. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Contract liabilities   $ 57 $ 57 $ 360  
Revenue recognized from satisfaction of performance obligations   85 376    
Accounts receivable   32,461 32,461   $ 35,817
Accounts receivable,allowance   451 451   $ 382
ASU 2016-02 [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Operating Lease, Liability   2,400 2,400    
Trade Accounts Receivable [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Accounts receivable   32,823 32,823 35,940  
Accounts receivable,allowance   $ 451 $ 451 $ 382  
Subsequent Event [Member] | Modified Dutch Auction [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Number of shares acquired in tender offer 417,237        
Per share cost of tender offer $ 8.00        
Aggregate cost of tender offer $ 3,338