Subsequent Events - Additional Information (Detail) (USD $)		0 Months Ended
Sep. 30, 2012	Nov. 07, 2012 Subsequent Event [Member] The Signature Bank [Member]
Subsequent Event [Line Items]
Additional borrowing line of credit		$ 9,000,000
Total Line of credit advanced to date	$ 5,934,616	$ 14,934,616

Increase for additional borrowings on the credit facility during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

Name:	us-gaap_LineOfCreditFacilityIncreaseAdditionalBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration