Common Stock	6 Months Ended
Jun. 30, 2018
Stockholders' Equity Note [Abstract]
Common Stock	NOTE 9. COMMON STOCK The Company’s common stock is duly authorized, fully paid, and non-assessable. On January 24, 2017, the Company exchanged 23,160 warrants (the “New Warrants”) to purchase common stock of the Company for 576,923 warrants (the “Old Warrants”) held by RES. The number of New Warrants issued in exchange for the Old Warrants equaled the number of shares of common stock issuable upon exercise of the Old Warrants pursuant to a cashless exercise provision of the Old Warrants. The New Warrants were exercisable for 23,160 shares of common stock, had an exercise price of $0.0065 for each common share, and would have expired on January 24, 2019. On the date of the exchange, the New Warrants had a fair value in excess of the Old Warrants of $289, which is reflected as equity transactions expense and an increase in additional paid-in capital as the exchange is assumed to be equivalent to the modification of an equity classified instrument. The New Warrants were exercised in full on September 28, 2017. On February 28, 2017, the holders of the Series D Preferred Stock voluntarily converted their shares into 6,004,957 shares of common stock (adjusted for the reverse stock split discussed below) at $10.40 per share pursuant to the terms of the preferred stock (see Note 10). Effective on March 15, 2017, the Company effected a reverse stock split of its common stock at a ratio of 1-for-6.5. No fractional shares of common stock were issued as fractional shares were settled in cash. A total of 73 shares were settled for $1. Impacted amounts and share information included in the consolidated financial statements and notes thereto have been adjusted for the stock split as if such stock split occurred on the first day of the periods presented. On March 29, 2017, the Company sold in an underwritten public offering 4,772,500 shares of its common stock, including 622,500 shares issued pursuant to the full exercise of an option to purchase additional shares of common stock granted to the underwriters, at a public offering price per share of $10.50. Net proceeds, after the payment of related expenses incurred through June 30, 2017, from this offering totaled $45,888. The Company’s common stock began trading on the NYSE American under its current symbol “CDOR” beginning at the open of market trading on July 21, 2017. The Company’s common stock previously traded on the NASDAQ Stock Market. On September 20, 2017, the Company entered into an equity distribution agreement with KeyBanc Capital Markets Inc. and BMO Capital Markets Corp. (collectively, the “Sales Agents”), pursuant to which we may sell, from time to time, up to an aggregate sales price of $50,000, subject to decrease in compliance with General Instruction I.B.6 of Registration Statement on Form S-3, of shares of our common stock pursuant to a prospectus supplement we filed with the Securities and Exchange Commission (“SEC”) through the Sales Agents acting as sales agent and/or principal, through an at-the-market offering program (our “ATM program”). Pursuant to Instruction I.B.6 to Registration Statement on Form S-3, we may not sell more than the equivalent of one-third of our public float during any 12 consecutive months so long as our public float is less than $75,000. During the three and six months ended June 30, 2018, we sold 16,140 and 28,474 shares, respectively, of common stock under the ATM program at an average sales price of $10.40 per share in both periods, for gross proceeds totaling $168 and $296 and net proceeds totaling $154 and $257, respectively, after cash commissions of 2% of gross proceeds paid to the Sales Agents and additional related costs. Since the inception of the ATM program, we have sold 197,478 shares of common stock at an average sales price of $10.18 per share for gross proceeds totaling $2,011 and net proceeds totaling $1,876.

NOTE 9. COMMON STOCK

The Company’s common stock is duly authorized, fully paid, and non-assessable.

On January 24, 2017, the Company exchanged 23,160 warrants (the “New Warrants”) to purchase common stock of the Company for 576,923 warrants (the “Old Warrants”) held by RES. The number of New Warrants issued in exchange for the Old Warrants equaled the number of shares of common stock issuable upon exercise of the Old Warrants pursuant to a cashless exercise provision of the Old Warrants. The New Warrants were exercisable for 23,160 shares of common stock, had an exercise price of $0.0065 for each common share, and would have expired on January 24, 2019. On the date of the exchange, the New Warrants had a fair value in excess of the Old Warrants of $289, which is reflected as equity transactions expense and an increase in additional paid-in capital as the exchange is assumed to be equivalent to the modification of an equity classified instrument. The New Warrants were exercised in full on September 28, 2017.

On February 28, 2017, the holders of the Series D Preferred Stock voluntarily converted their shares into 6,004,957 shares of common stock (adjusted for the reverse stock split discussed below) at $10.40 per share pursuant to the terms of the preferred stock (see Note 10).

Effective on March 15, 2017, the Company effected a reverse stock split of its common stock at a ratio of 1-for-6.5. No fractional shares of common stock were issued as fractional shares were settled in cash. A total of 73 shares were settled for $1. Impacted amounts and share information included in the consolidated financial statements and notes thereto have been adjusted for the stock split as if such stock split occurred on the first day of the periods presented.

On March 29, 2017, the Company sold in an underwritten public offering 4,772,500 shares of its common stock, including 622,500 shares issued pursuant to the full exercise of an option to purchase additional shares of common stock granted to the underwriters, at a public offering price per share of $10.50. Net proceeds, after the payment of related expenses incurred through June 30, 2017, from this offering totaled $45,888.

The Company’s common stock began trading on the NYSE American under its current symbol “CDOR” beginning at the open of market trading on July 21, 2017. The Company’s common stock previously traded on the NASDAQ Stock Market.

On September 20, 2017, the Company entered into an equity distribution agreement with KeyBanc Capital Markets Inc. and BMO Capital Markets Corp. (collectively, the “Sales Agents”), pursuant to which we may sell, from time to time, up to an aggregate sales price of $50,000, subject to decrease in compliance with General Instruction I.B.6 of Registration Statement on Form S-3, of shares of our common stock pursuant to a prospectus supplement we filed with the Securities and Exchange Commission (“SEC”) through the Sales Agents acting as sales agent and/or principal, through an at-the-market offering program (our “ATM program”). Pursuant to Instruction I.B.6 to Registration Statement on Form S-3, we may not sell more than the equivalent of one-third of our public float during any 12 consecutive months so long as our public float is less than $75,000. During the three and six months ended June 30, 2018, we sold 16,140 and 28,474 shares, respectively, of common stock under the ATM program at an average sales price of $10.40 per share in both periods, for gross proceeds totaling $168 and $296 and net proceeds totaling $154 and $257, respectively, after cash commissions of 2% of gross proceeds paid to the Sales Agents and additional related costs. Since the inception of the ATM program, we have sold 197,478 shares of common stock at an average sales price of $10.18 per share for gross proceeds totaling $2,011 and net proceeds totaling $1,876.