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CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - shares	Sep. 30, 2018	Jun. 30, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock subject to possible forfeiture (in shares)	750,000	750,000

X

- Definition

Number of shares of common stock subject to forfeiture in the event of the over-allotment option is not exercised by the underwriters.

+ References

No definition available.

+ Details

Name:	amci_CommonStockSubjectToPossibleForfeiture
Namespace Prefix:	amci_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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