Annual report pursuant to section 13 and 15(d)

PREFERRED STOCK ISSUANCE AND CONVERSION (Details)

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PREFERRED STOCK ISSUANCE AND CONVERSION (Details) (East Tennessee Materials and Energy Corporation [Member], Series B Preferred Stock [Member], USD $)
 12 Months Ended
Dec. 31, 2012
East Tennessee Materials and Energy Corporation [Member] | Series B Preferred Stock [Member]
  
Subsidiary or Equity Method Investee [Line Items]  
Preferred stock of subsidiary, liquidation preference per share (in dollars per share) $ 1.00
Preferred stock of subsidiary, redeemable price per share (in dollars per share) $ 1
Preferred stock of subsidiary, dividend rate (in hundredths) 5.00%
Preferred stock of subsidiary, per share amount on which dividend rate applied (in dollars per share) $ 1
Preferred stock of subsidiary, accrued dividends $ 675,000
Preferred stock of subsidiary, accrued dividends in each year from 2003 to 2012 $ 64,000