For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies - Schedule of Customers Representing Greater than 10% of Accounts Receivable and Revenue (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Geographic Concentration Risk \| Revenue \| State of Ohio
Concentration Risk [Line Items]
Percentage of concentration risk		28.00%
Geographic Concentration Risk \| Accounts Receivable \| State of Ohio
Concentration Risk [Line Items]
Percentage of concentration risk		100.00%
Customer Concentration Risk \| Revenue \| Customer A
Concentration Risk [Line Items]
Percentage of concentration risk		72.00%
Customer Concentration Risk \| Revenue \| Customer B
Concentration Risk [Line Items]
Percentage of concentration risk	52.00%
Customer Concentration Risk \| Revenue \| Customer C
Concentration Risk [Line Items]
Percentage of concentration risk	40.00%
Customer Concentration Risk \| Accounts Receivable \| Customer D
Concentration Risk [Line Items]
Percentage of concentration risk	100.00%