XML 43 R32.htm IDEA: XBRL DOCUMENT v3.21.1

Summary of Significant Accounting Policies - Convertible Preferred Stock (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounting Policies [Abstract]
Weighted average convertible preferred stock	43,750	96,250

X

- Definition

Weighted Average Number of Shares, Convertible Preferred Stock

+ References

No definition available.

+ Details

Name:	crk_WeightedAverageNumberOfSharesConvertiblePreferredStock
Namespace Prefix:	crk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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