Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Lease Obligations) (Details)

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Commitments and Contingencies (Lease Obligations) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]        
Rent expense $ 268,000 $ 258,000 $ 811,000 $ 808,000
Sub lease income $ 96,000 $ 90,000 $ 288,000 $ 279,000