Stockholders' equity and earnings per share (Details Narrative) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended		6 Months Ended	12 Months Ended		0 Months Ended
	Feb. 28, 2013	Dec. 31, 2012	May 21, 2012	May 26, 2011	Feb. 28, 2013 Red Mountain Resources	Feb. 28, 2013 Red Mountain Resources Notes Payable	Jun. 30, 2013 Stock Options	Dec. 31, 2012 Stock Options	Dec. 31, 2011 Stock Options Directors	May 26, 2011 Warrants - $2.25 exercise price	Jun. 30, 2013 Warrants - $5.00 exercise price
Private offering, units issued				$ 3,600,000
Sales price, units				1.50
Warrant exercise price										2.25	5.00
Shares callable under warrants issued										3,600,000	3,125
Fair value of warrants										898,384
Volatility factor							50.00%			50.00%
Expected life							2 years 6 months			2 years 11 months 1 day
Issuance of shares to settle change of control liability with former CEO, shares		150,000
Severance payments under employment agreement, total payable			478,298
Amount of severance payments covered by shares issued		239,149
Number of options granted									85,000
Option exercise price									$ 4.80
Cash paid to settle claims	$ 633,975
Shares issued to settle claims	745,854				422,650	611,630