Line of Credit - Additional Information (Detail) (USD $)	9 Months Ended	1 Months Ended
Sep. 30, 2013 Line of Credit	Sep. 27, 2013 New Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity	$ 4,000,000	$ 4,000,000
Debt instrument, basis spread on variable rate	3.25%	1.75%
Debt instrument, description of variable rate basis	Daily Three Month LIBOR plus 3.25%	1.75% above either the daily one month LIBOR or the LIBOR in effect on the first day of the applicable fixed rate term

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant