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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]        
Rent expense $ 203,000 $ 241,000 $ 407,000 $ 550,000
Sub lease income $ 96,000 $ 90,000 $ 192,000 $ 180,000