Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Joint interest billings and other, allowance	$ 134	$ 134
Office and other equipment, accumulated depreciation	$ 3,033	$ 2,490
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	29,150,220	28,696,321
Common stock, shares outstanding (in shares)	29,150,220	28,696,321
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	35,416,446	35,452,178
Common stock, shares outstanding (in shares)	35,416,446	35,452,178
Earthstone Energy Holdings, LLC
Common stock, shares outstanding (in shares)	64,566,666	64,148,499
EEH Units Held By Earthstone and Lynden US | Earthstone Energy Holdings, LLC
Common stock, shares outstanding (in shares)	29,150,220	28,696,321
EEH Units Held By Others | Earthstone Energy Holdings, LLC
Common stock, shares outstanding (in shares)	35,416,446	35,452,178