Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Withholding taxes stock-based compensation	$ 7,000	$ 100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		300,000
Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation		$ 300,000

Adjustment to additional paid in capital related to the net effect of excess tax benefits and tax deficiencies associated with an equity-based compensation plan and employee stock ownership plan (ESOP).

No definition available.

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Namespace Prefix:	enzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration