Annual report pursuant to Section 13 and 15(d)

Summary of significant accounting policies - Agreement with Southern California Gas Company (Details)

v2.4.0.8
Summary of significant accounting policies - Agreement with Southern California Gas Company (Details) (Common stock, USD $)
0 Months Ended
Jun. 13, 2011
Common stock
 
Class of Stock [Line Items]  
Redeemable common stock $ 500,000
Redeemable common stock, redemption right maximum period 5 years