Long-Term Loan, Related Party (Details Textual) (USD $)	0 Months Ended	3 Months Ended		41 Months Ended
	Nov. 17, 2010	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Principal amount of promissory note	$ 1,000	$ 1,000
Debt Instrument, Periodic Payment, Principal		17,400,000
Principal sum evidenced by the Note such that the unconverted portion multiple		1.00
Principal amount, which represents a conversion price (usd per share)		$ 2.6164			$ 2.6164
Debt Instrument, Convertible, Conversion Ratio	382.202837	382.202837
Interest expense		679,000	3,043,000
Amendment Three [Member]
Debt Instrument [Line Items]
Debt instrument loan agreement one-time fee		25,000
Legal fees and expenses paid		20,000
Kien Huat Realty Limited
Debt Instrument [Line Items]
Principal amount of promissory note		1,000
Unconverted Portion of Notes		1,000
Non-assessable shares of Empire's common stock at a conversion rate (shares)		377
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%
Interest Paid				4,100,000
Foreign Entity Affiliate, Interest, Tax Withholding Percentage				30.00%
Interest Paid, Withholding Tax Payable			1,200,000	1,200,000
Withholding Tax Payable, including Interest On Income Tax			1,300,000	1,300,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		154,000
Bridge Loan [Member]
Debt Instrument [Line Items]
Interest expense		$ 323,000	$ 323,000,000