Fair Value of Financial Assets and Liabilities - Schedule of Aggregate Fair Values of the Warrant Liability (Details) - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	8 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2017	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Balance as of the beginning of the period					$ 520
Initial fair value of warrant liability				479
Change in fair value	$ 561	$ 41	$ 41	41	1,057
Balance as of the end of the period	$ 1,577			$ 520	$ 1,577

Amount of expense (income) related to adjustment to fair value of warrant liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875

Name:	us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration