Summary of Significant Accounting Policies - Future Minimum Lease Payments from Capital Leases (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Accounting Policies [Abstract]
July 1 to December 31, 2019	$ 330
2020	636
2021	597
2022	505
2023	82
Thereafter	0
Total minimum lease payments	2,150
Less: Amount representing interest	(200)
Present value of minimum lease payments	$ 1,950

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Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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Amount of lessee's undiscounted obligation for lease payments for finance lease.

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Amount of lessee's undiscounted obligation for lease payments for finance lease, due in remainder of fiscal year following latest fiscal year ended.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

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