Equity (Deficit) (Tables)

12 Months Ended

Dec. 31, 2019

Equity And Distributions [Line Items]

Summary of Changes in Number of Outstanding Common Units and Shares of Common Stock

The following table summarizes the changes in the number of outstanding common units and shares of common stock:

	Common
	Shares
Balance, December 31, 2016 (Predecessor)		83,827,920
Restricted common units issued		—
Restricted common units forfeited		(12,952	)
Restricted common units repurchased (1)		(14,681	)
Balance, May 4, 2017 (Predecessor)		83,800,287
Cancellation of Predecessor common units		(83,800,287	)
Balance, May 4, 2017 (Predecessor)		—
Issuance of Successor common stock		25,000,000
Balance, May 5, 2017 (Successor)		25,000,000
Issuance of Successor common stock		—
Balance, December 31, 2017 (Successor)		25,000,000
Issuance of common stock		—
Restricted stock units vested		163,700
Repurchase of common shares		(65,152	)
Restricted common stock repurchased and retired under tender offer		(2,916,667	)
Balance, December 31, 2018 (Successor)		22,181,881
Issuance of common stock		—
Restricted stock units vested		412,938
Repurchase of common shares		(120,163	)
Common stock repurchased and retired under share repurchase program		(169,400	)
Balance, June 30, 2019		22,305,256
Restricted stock units vested		38,181
Repurchase of common shares		(9,427	)
Balance, August 5, 2019		22,334,010
Ratio to convert Amplify shares		0.933
Common stock issued to Legacy Amplify stockholders		20,837,633
Midstates stock outstanding and acquired with the Merger		20,415,005
Treasury shares acquired from the Merger		205,861
Restricted stock units vested		682,552
Repurchase of common shares		(31,697	)
Common stock repurchased and retired under share repurchase program		(4,195,247	)
Cancelation and retirement of shares		(347,567	)
Balance, December 31, 2019		37,566,540

(1) Restricted common units were generally net-settled by our Predecessor unitholders to cover the required withholding tax upon vesting. The Predecessor unitholders surrendered units with value equivalent to the employees’ minimum statutory obligation for the applicable income and other employment taxes. Total payments remitted for the employees’ tax obligations to the appropriate taxing authorities were less than approximately $0.1 million for the period from January 1, 2017 through May 4, 2017. These net-settlements had the effect of unit repurchases by the Company as they reduced the number of units that would have otherwise been outstanding as a result of the vesting and did not represent an expense to the Company.

Warrants [Member]

Equity And Distributions [Line Items]

Summary of Assumptions used to Estimate the Fair Value

The fair values for the warrants upon issuance on the Effective Date have been estimated using the Black-Scholes option pricing model using the following assumptions:

	Warrants Issued in
	Successor Period
Risk-free interest rate		2.06	%
Dividend yield		—
Expected life (in years)		5.0
Expected volatility		50.0	%
Strike Price	$	42.60
Calculated fair value	$	2.20