Variable Interest Entity ("VIE") - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Apr. 12, 2013	Jun. 30, 2013	Apr. 26, 2013	Mar. 22, 2013	Mar. 18, 2013
Variable Interest Entity [Line Items]
Equity investment at risk		$ 5.3	$ 1.9		$ 3.1
Future capital contributions amount by company		3.5
Capital contribution made by company		5.00	1.85	3.15
Capital contribution made by non controlling interest		0.3
Maximum capital contributions amount by company		8.5
Maximum capital contributions amount by minority interest		0.5
Rights Offering Description		If the rights offering is either not consummated, or is consummated but the participation rate in the offering is less than 75% of the total offering amount of approximately $5 million, then it is likely that, without additional financing, the Company will not have sufficient funds to make its final $3.5 million scheduled capital contribution to Three Lions, pay for the offering expenses and have sufficient funds remaining to fund the Company's near-term operating expenses.
Carrying value of investment		4.1
Investment		5.2
Cash collateral letter of credit issued	$ 0.2
Letter of credit expiration date	Apr. 15, 2014