Long-Term Obligations (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Apr. 30, 2015
Series A Convertible Redeemable Preferred Stock
Temporary Equity [Line Items]
Number of shares issued	4,207,987
Share Price	$ 1.85
Warrant \| Series A Warrant
Temporary Equity [Line Items]
Warrants to purchase shares	2,042,583	1,661,055
Warrants exercise price	$ 3.70
Private Placement \| Series A Warrant
Temporary Equity [Line Items]
Warrants to purchase shares	2,000,000
Warrants exercise price	$ 3.70
Private Placement \| Series A Convertible Redeemable Preferred Stock
Temporary Equity [Line Items]
Number of shares issued	4,200,000
Share Price	$ 1.85
Proceeds from transactions	$ 7.3

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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.(i)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

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- Definition

The cash inflow from issuance of callable preferred stock which is identified as being convertible to another type of financial security at the option of the issuer or the holder.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

Price of a single share of a number of saleable stocks of a company.

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