Equity Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended		1 Months Ended		0 Months Ended	1 Months Ended
	Jan. 15, 2014	Jun. 30, 2014	Mar. 17, 2014	Jun. 20, 2014 IPO [Member]	Jun. 20, 2014 Underwriters [Member]	Jun. 16, 2014 Series A Convertible Preferred Stock [Member]	Mar. 17, 2014 Consultant [Member]
Stock Issued During Period, Shares, Issued for Services	7,333						9,595
Stockholders' Equity, Reverse Stock Split		May 30, 2014, the Company affected a 1-for-15 reverse stock split, by which each share of EnerJex common stock was reclassified, and changed into 1/15th of a fully paid and non-assessable share of common stock. In lieu of fractions of a share, the Company paid to holders of fractions of a share cash equal to $11.25 per share
Stock Issued During Period, Shares, Conversion of Convertible Securities						318,630
Stock Issued During Period, Shares, New Issues				639,157	83,368
Sale of Stock, Price Per Share				$ 23.75
Stock Issued During Period, Value, New Issues				$ 15.2
Share Price	$ 7.05		$ 7.50