Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 02, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Lease termination option	3 years
Sales-type Lease, Revenue	$ 0	$ 151
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Rolling Twelve Months	458			$ 533
Capital Leases, Lessor Balance Sheet, Net Investment in Direct Financing and Sales Type Leases, Noncurrent	639			475
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of Fiscal Year	368
Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year	1,694
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	707
Operating Lease, Right-of-Use Asset	1,882		$ 2,100
Operating Lease, Liability, Current	855
Operating Lease, Liability, Noncurrent	1,064
Operating Lease, Liability	$ 1,919		$ 2,100
Operating Lease, Weighted Average Remaining Lease Term	2 years 3 months
Operating Lease, Weighted Average Discount Rate, Percent	6.00%
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	$ 837
Lessee, Operating Lease, Liability, Payments, Due Year Three	473
Lessee, Operating Lease, Liability, Payments, Due Year Four	0
Lessee, Operating Lease, Liability, Payments, Due Year Five	0
Lessee, Operating Lease, Liability, Payments, Due after Year Five	0
Lessee, Operating Lease, Liability, Payments, Due	2,017
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(98)
Lessor, Operating Lease, Payments to be Received, Two Years	1,123
Lessor, Operating Lease, Payments to be Received, Three Years	304
Lessor, Operating Lease, Payments to be Received, Four Years	26
Lessor, Operating Lease, Payments to be Received, Rolling Year Five	0
Lessor, Operating Lease, Payments to be Received, Thereafter	0
Lessor, Operating Lease, Payments to be Received	3,147
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years	394
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years	198
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years	150
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years	52
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter	0
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	1,162
Sales-type and Direct Financing Leases, Lease Receivable	1,097			$ 1,008
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	65
Cost of Goods Sold, Sales-type Lease	0	(58)
Sales-type Lease, Selling Profit (Loss)	0	93
Sales-type Lease, Interest Income, Lease Receivable	12	12
Operating Leases, Income Statement, Initial Direct Costs	0	(8)
Operating Lease, Lease Income	$ 1,237	$ 1,285
Lessee, Operating Lease, Renewal Term	5 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessor, Operating Lease, Term of Contract	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessor, Operating Lease, Term of Contract	8 years