Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Narrative) (Details)

v3.10.0.1
Commitments and Contingencies (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Commitments and Contingencies [Line Items]    
Rent expense $ 255,000 $ 474,000
(Income) expense for long-term compensation plan (11,000) (5,000)
Accrual for long-term compensation plans 0 11,000
Performance Units [Member]    
Commitments and Contingencies [Line Items]    
Award payouts, cash 0 0
Line of Credit [Member]    
Commitments and Contingencies [Line Items]    
Line of credit, amount outstanding 0 $ 0
Line of credit, maximum borrowing capacity 15,000,000  
Line of credit, remaining borrowing capacity $ 9,728,000  
Line of credit, basis spread on variable rate 2.00%  
Line of credit facility, interest rate at period end 4.50%  
Line of credit, expiration date Aug. 12, 2021  
Long-Term Compensation Plan [Member]    
Commitments and Contingencies [Line Items]    
Award payouts, stock 0 0
Long-Term Compensation Plan [Member] | 2016 to 2018 and 2017 to 2019 [Member] | Performance Units [Member]    
Commitments and Contingencies [Line Items]    
Percentage paid out in stock 50.00%  
Percentage paid out in cash 50.00%  
Maximum [Member]    
Commitments and Contingencies [Line Items]    
Operating lease terms 5 years  
Minimum [Member]    
Commitments and Contingencies [Line Items]    
Operating lease terms 1 year  
Minimum [Member] | Line of Credit [Member]    
Commitments and Contingencies [Line Items]    
Line of credit, covenant, liquidity requirement $ 10,000,000