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Shareholders' Equity (Detail) (USD $)	0 Months Ended			1 Months Ended	6 Months Ended
	Mar. 28, 2013	Mar. 28, 2012	Mar. 29, 2007	May 31, 2013	Jun. 30, 2013	Jun. 30, 2012	May 09, 2013
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues				3,903,004
Share Price							$ 4.14
Payments of Stock Issuance Costs				$ 39,000
Proceeds from issuance of common stock upon direct offering					16,120,000	0
Period for issuance			5 years
Extension period		1 year
Shares of common stock to purchase by warrant			197,478
Exercise price of warrants			12.25
Warrant expiration date	Mar. 29, 2014	Mar. 29, 2013
Change in fair value of warrants					$ 41,000	$ 511,000

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The exercise price of each class of warrants or rights outstanding.

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