Variable Interest Entity ("VIE") - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 18, 2013	Mar. 31, 2013	Mar. 22, 2013	Apr. 12, 2013 Subsequent event	Mar. 31, 2013 Minimum	Mar. 31, 2013 Maximum	Mar. 31, 2013 45 days	Mar. 31, 2013 120 days
Variable Interest Entity [Line Items]
Equity investment at risk		$ 3,340,000
Future capital contributions period after March 15, 2013					45 days	120 days
Future capital contributions amount by company							1,850,000	3,500,000
Capital contribution made by non controlling interest	185,000
Maximum capital contributions amount by company		8,500,000
Maximum capital contributions amount by minority interest		500,000
Ownership Percentage to be held by OA3 LLC in the event the company can not contribute the last contribution		9.00%
Capital contribution made by company	3,150,000		3,150,000
Carrying value of investment		2,910,000
Investment		3,350,000
Letter of credit issued				$ 200,000
Letter of credit expiration date				Apr. 15, 2014