Fair Value of Financial Instruments	6 Months Ended
Fair Value of Financial Instruments	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	(11) Fair Value of Financial Instruments U.S. GAAP establishes a framework for measuring fair value under generally accepted accounting principles and enhances disclosures about fair value measurements. Fair value is defined as the amount that would be received for an asset or paid to transfer a liability (i.e., an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value maximize the use of observable inputs and minimize the use of unobservable inputs. The standard describes the following fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value: Level 1: Quoted prices in active markets for identical assets and liabilities. Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value of cash and cash equivalents are classified as Level 1 at June 30, 2015 and December 31, 2014. The fair value of the common stock warrant liability was $0 as of March 31, 2015 and the warrant expired in April 2015. Therefore, during the three months ended June 30, 2015 no income or expense was recorded to adjust the value of the common stock warrant liability to fair value. The value of the common stock warrant liability was determined by using the Black-Scholes option pricing model, which is based on the Company’s stock price at measurement date, exercise price of the common stock warrants, risk-free interest rate and historical volatility, and are classified as a Level 2 measurement. During the three and six months ended June 30, 2014 the Company recorded income of $0.1 million and $0.4 million, respectively, to adjust the value of the common stock warrant liability to fair value. The fair values of accounts receivable and accounts payable approximate their respective carrying amounts. The Company’s long-term debt is carried at amortized face value, which approximates fair value based on current market pricing of similar debt instruments and is categorized as a Level 2 measurement.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.