Long-Term Loan, Related Party (Details Textual) (USD $)	0 Months Ended	12 Months Ended				0 Months Ended			0 Months Ended		12 Months Ended
	Aug. 08, 2012	Dec. 31, 2012	Dec. 31, 2011	Nov. 17, 2010	Sep. 23, 2010	Aug. 08, 2012 Amendment One [Member]	Nov. 17, 2010 Kien Huat Realty Limited [Member]	May 20, 2011 Kien Huat Realty Limited [Member]	May 20, 2011 Bridge Loan [Member]	Nov. 17, 2010 Bridge Loan [Member]	Dec. 31, 2012 Bridge Loan [Member]	Dec. 31, 2011 Bridge Loan [Member]
Debt Instrument [Line Items]
Stated percentage on debt instrument					5.50%
Bridge Loan bears interest rate						7.50%				5.00%
Possible maturity date of bridge loan										Jun. 30, 2011
Expiration of rights offering											5 days
Empire Prepaid Indebtedness in Amount Equal Aggregate Amount of Gross Proceeds Received									100.00%
Principal amount of the Bridge Loan extended									2 years
Provisions for Loan Agreement							$ 1,000
Principal sum evidenced by the Note such that the unconverted portion multiple				1.00
Non-assessable shares of Empire's common stock at a conversion rate (shares)							377
Shares of common stock							1,000
Principal amount, which represents a conversion price (usd per share)							$ 2.65
Average of last reported bid prices common stock for consecutive trading days							20 days
Conversion Price in Effect on Measuring Date							200.00%
Short-term bridge loan in the principal amount								17,600,000
Extend maturity date of Bridge loan	Dec. 31, 2014								May 17, 2013
Interest expense		1,063,000	1,225,000								1,100,000	1,200,000
Debt instrument loan agreement one-time fee						$ 174,261
Percentage of fees as of outstanding principal amount						1.00%