Notes Payable - Schedule of Notes Payable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total notes payable, current portion	$ 310	$ 296
Total notes payable, non-current portion	8,323	8,404
Green Bank
Total notes payable, current portion	310	296
Total notes payable, non-current portion	$ 8,323	$ 8,404

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LongTermNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant