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Wind-Down Expenses - Summary of Changes to Wind-Down Reserve (Detail) (USD $)	3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Facility Closing In Rhode Island [Member]	Mar. 31, 2013 Facility Closing In Rhode Island [Member]	Jun. 30, 2013 Facility Closing In Rhode Island [Member]	Dec. 31, 2012 Facility Closing In Rhode Island [Member]
Restructuring Cost and Reserve [Line Items]
Accrued wind-down reserve at beginning of period	$ 505,000			$ 505,000	$ 854,000	$ 854,000	$ 1,683,000
Less actual expenses recorded against estimated reserve during the period	505,000			(505,000)	(372,000)	(877,000)	(1,185,000)
Additional expense recorded to revise estimated reserve at period-end					23,000	23,000	356,000
Revised reserve at period-end					505,000		854,000
Add deferred rent at period-end		(392,057)	(46,495)		124,000		249,000
Total accrued wind-down expenses at period-end, current					$ 629,000		$ 1,103,000

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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