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 9 Months Ended
Aug. 06, 2018
Jul. 11, 2018
Sep. 30, 2018
Sep. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]            
Contract liabilities     $ 125 $ 125 $ 360  
Revenue recognized from satisfaction of performance obligations     56 433    
Accounts receivable     39,295 39,295   $ 35,817
Accounts receivable,allowance     495 $ 495   $ 382
Dividend annualized $ 0.10          
Dividend per quarter $ 0.025          
Dividend date declared       Aug. 06, 2018    
Dividend date of record       Nov. 02, 2018    
Dividend date to be paid       Nov. 16, 2018    
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        
ASU 2016-02 [Member]            
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]            
Operating Lease, Liability     1,318 $ 1,318    
Trade Accounts Receivable [Member]            
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]            
Accounts receivable     39,790 39,790 35,940  
Accounts receivable,allowance     $ 495 $ 495 $ 382