Other Related Party Transactions - Additional Information (Detail) (Executive Vice President [Member], USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Executive Vice President [Member]
Related Party Transaction [Line Items]
Fees for consulting work performed	$ 65,000	$ 62,500
Payment of annual bonus compensation	$ 77,500	$ 47,500

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration