Stockholders' Equity (Details 3)	9 Months Ended
Sep. 30, 2019 $ / shares shares
Stockholders' Equity Note [Abstract]
Warrants outstanding and exercisable, beginning \| shares	863,084
Warrants exercised \| shares	(277,778)
Warrants outstanding and exercisable, ending \| shares	585,306
Weighted average exercise price outstanding and exercisable, beginning \| $ / shares	$ 6.00
Weighted average exercise price exercised \| $ / shares	.06
Weighted average exercise price outstanding and exercisable, ending \| $ / shares	$ 8.85
Weighted average remaining contractual life, beginning	2 years 6 months 4 days
Weighted average remaining contractual life, ending	2 years 11 months 12 days

Exercise price per share or per unit of warrants or rights exercised.

No definition available.

Name:	DCAR_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised
Namespace Prefix:	DCAR_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of warrants or rights exercised.

+ References

No definition available.

+ Details

Name:	DCAR_ClassOfWarrantOrRightExercised
Namespace Prefix:	DCAR_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	DCAR_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingBeginningWeightedAverageRemainingContractualTerms
Namespace Prefix:	DCAR_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration