Stockholders' Equity (Deficit)	3 Months Ended
Mar. 31, 2018
Equity [Abstract]
Stockholders' Equity (Deficit)	Stockholders’ Equity (Deficit) Intermountain Purchase Agreement As discussed in Note 1, Business Description and Basis of Presentation, on January 23, 2018, the Company entered into the Intermountain Services Agreement and the Intermountain Purchase Agreement, pursuant to which the Company sold to Intermountain, in private placements under the Securities Act, (i) 4,665,594 shares of common stock, at a purchase price of $4.2867 per share (representing the per share average closing price of the Company’s Common Stock for the period from January 1, 2018 to January 12, 2018), and (ii) a warrant to acquire up to 1,500,000 shares of Common Stock at an initial exercise price of $6.00 per share, on the terms and subject to the conditions set forth in the Warrant Agreement, for an aggregate purchase price of $20 million. As a result of the sale of the common stock and warrant, the Company recorded $47 thousand to common stock and $19.3 million to additional paid-in-capital, net of $0.7 million of issuance costs. Preferred Stock and Warrant The Company has 5,000,000 shares of authorized preferred stock, each with a par value of $0.01. The preferred stock may be issued from time to time in one or more series. The board of directors of the Company ("Board") is authorized to determine the rights, preferences, privileges and restrictions of the Company’s authorized but unissued shares of preferred stock. On February 16, 2016, at the close of the Transaction, the Company issued to TCP-ASC ACHI Series LLLP, a limited liability limited partnership jointly owned by Ascension Health Alliance and investment funds affiliated with TowerBrook (the "Investor"): (i) 200,000 shares of its 8.00% Series A Convertible Preferred Stock, par value $0.01 per share (the "Series A Preferred Stock" or "Preferred Stock"), for an aggregate price of $200 million and (ii) an exercisable warrant to acquire up to 60 million shares of its common stock with an exercise price of $3.50 per common share and a term of ten years. The Series A Preferred Stock is immediately convertible into shares of common stock. As of March 31, 2018 and December 31, 2017, the Company had 232,032 and 227,483 shares of Preferred Stock outstanding, respectively. See Note 12, 8% Series A Convertible Preferred Stock, for additional information. Common Stock Each outstanding share of the Company's common stock, par value $0.01 per share ("common stock"), is entitled to one vote per share on all matters submitted to a vote by shareholders. Subject to the rights of any preferred stock which may from time to time be outstanding, the holders of outstanding shares of common stock are entitled to receive dividends and, upon liquidation or dissolution, are entitled to receive pro rata all assets legally available for distribution to stockholders. No dividends were declared or paid on the common stock during 2018 or 2017. Treasury Stock On November 13, 2013, the Board authorized a repurchase of up to $50.0 million of the Company’s common stock in the open market or in privately negotiated transactions. The timing and amount of any shares repurchased will be determined by the Company based on its evaluation of market conditions and other factors. The repurchase program may be suspended or discontinued at any time at the sole discretion of the Board. Any repurchased shares will be available for use in connection with the Company’s stock plans and for other corporate purposes. The Company funds the repurchases from cash on hand. During the year ended December 31, 2017, the Company repurchased 855,474 shares of the Company stock for $2.5 million. During the three months ended March 31, 2018, no shares were repurchased. No shares have been retired. As of March 31, 2018 and December 31, 2017, the Company held in treasury 5,321,393 shares of repurchased stock, respectively. Treasury stock also includes repurchases of Company stock related to employees’ tax withholding upon vesting of restricted shares. For the three months ended March 31, 2018, the Company repurchased 362,402 shares related to employees’ tax withholding upon vesting of restricted shares. Additionally, treasury stock includes restricted stock awards that have been canceled or forfeited. See Note 9, Share-Based Compensation.

Stockholders’ Equity (Deficit)

Intermountain Purchase Agreement

As discussed in Note 1, Business Description and Basis of Presentation, on January 23, 2018, the Company entered into the Intermountain Services Agreement and the Intermountain Purchase Agreement, pursuant to which the Company sold to Intermountain, in private placements under the Securities Act, (i) 4,665,594 shares of common stock, at a purchase price of $4.2867 per share (representing the per share average closing price of the Company’s Common Stock for the period from January 1, 2018 to January 12, 2018), and (ii) a warrant to acquire up to 1,500,000 shares of Common Stock at an initial exercise price of $6.00 per share, on the terms and subject to the conditions set forth in the Warrant Agreement, for an aggregate purchase price of $20 million. As a result of the sale of the common stock and warrant, the Company recorded $47 thousand to common stock and $19.3 million to additional paid-in-capital, net of $0.7 million of issuance costs.

Preferred Stock and Warrant

The Company has 5,000,000 shares of authorized preferred stock, each with a par value of $0.01. The preferred stock may be issued from time to time in one or more series. The board of directors of the Company ("Board") is authorized to determine the rights, preferences, privileges and restrictions of the Company’s authorized but unissued shares of preferred stock. On February 16, 2016, at the close of the Transaction, the Company issued to TCP-ASC ACHI Series LLLP, a limited liability limited partnership jointly owned by Ascension Health Alliance and investment funds affiliated with TowerBrook (the "Investor"): (i) 200,000 shares of its 8.00% Series A Convertible Preferred Stock, par value $0.01 per share (the "Series A Preferred Stock" or "Preferred Stock"), for an aggregate price of $200 million and (ii) an exercisable warrant to acquire up to 60 million shares of its common stock with an exercise price of $3.50 per common share and a term of ten years. The Series A Preferred Stock is immediately convertible into shares of common stock. As of March 31, 2018 and December 31, 2017, the Company had 232,032 and 227,483 shares of Preferred Stock outstanding, respectively. See Note 12, 8% Series A Convertible Preferred Stock, for additional information.

Common Stock

Each outstanding share of the Company's common stock, par value $0.01 per share ("common stock"), is entitled to one vote per share on all matters submitted to a vote by shareholders. Subject to the rights of any preferred stock which may from time to time be outstanding, the holders of outstanding shares of common stock are entitled to receive dividends and, upon liquidation or dissolution, are entitled to receive pro rata all assets legally available for distribution to stockholders. No dividends were declared or paid on the common stock during 2018 or 2017.

Treasury Stock

On November 13, 2013, the Board authorized a repurchase of up to $50.0 million of the Company’s common stock in the open market or in privately negotiated transactions. The timing and amount of any shares repurchased will be determined by the Company based on its evaluation of market conditions and other factors. The repurchase program may be suspended or discontinued at any time at the sole discretion of the Board. Any repurchased shares will be available for use in connection with the Company’s stock plans and for other corporate purposes. The Company funds the repurchases from cash on hand. During the year ended December 31, 2017, the Company repurchased 855,474 shares of the Company stock for $2.5 million. During the three months ended March 31, 2018, no shares were repurchased. No shares have been retired. As of March 31, 2018 and December 31, 2017, the Company held in treasury 5,321,393 shares of repurchased stock, respectively.

Treasury stock also includes repurchases of Company stock related to employees’ tax withholding upon vesting of restricted shares. For the three months ended March 31, 2018, the Company repurchased 362,402 shares related to employees’ tax withholding upon vesting of restricted shares. Additionally, treasury stock includes restricted stock awards that have been canceled or forfeited. See Note 9, Share-Based Compensation.