Long-Term Debt and Line of Credit - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	Aug. 01, 2015
Debt Instrument, Description of Variable Rate Basis	LIBOR rate plus 1.75%, which was 1.92%
Bank Of America Libor Rate
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	5,000,000

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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