Lease Commitments (Narrative) (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) lease
Number of operating leases identified | lease		16
Operating lease related to occupancy expenses	$ 192,000	$ 362,000
Operating lease related to equipment expenses	$ 41,000	$ 85,000
Minimum
Operating lease, term of contract	1 year	1 year
Maximum
Operating lease, term of contract	7 years	7 years