Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	15. SUBSEQUENT EVENT *Registered Direct Offering* On February 3, 2016, URI and Aspire Capital entered into a stock purchase agreement whereby URI sold 296,666 shares of its common stock in a registered direct offering for gross and net proceeds of $0.8 million. There were no underwriting discounts or placement agent fees. *Option Agreement with Aspire Capital* On February 3, 2016, URI and Aspire Capital, entered into an option agreement by which Aspire Capital granted us the right at any time or times prior to April 30, 2017 to require Aspire Capital to enter into up to two common stock purchase agreements, each having a term of up to 24 months and collectively requiring Aspire Capital to purchase up to $10 million in the aggregate of our common stock (or such lesser amount as we may determine) on an ongoing basis when required by URI. As consideration for Aspire Capital entering into the option agreement, we issued 75,000 shares of our common stock to Aspire Capital. *Special Meeting of Stockholders* URI held a special meeting of stockholders at which our stockholders approved an amendment to the our Restated Certificate of Incorporation to effect a reverse stock split of our issued and outstanding common stock by a ratio of not less than 1-for-2 and not more than 1-for-20, such ratio to be determined in the discretion of the Board of Directors at any time on or before July 31, 2016. URI also received stockholder approval for a reduction in the number of authorized shares of our common stock if the reverse stock split is implemented. The special meeting, as previously adjourned, was held on February 11, 2016.

Subsequent Events

12 Months Ended

Dec. 31, 2015

15. SUBSEQUENT EVENT

Registered Direct Offering

On February 3, 2016, URI and Aspire Capital entered into a stock purchase agreement whereby URI sold 296,666 shares of its common stock in a registered direct offering for gross and net proceeds of $0.8 million. There were no underwriting discounts or placement agent fees.

Option Agreement with Aspire Capital

On February 3, 2016, URI and Aspire Capital, entered into an option agreement by which Aspire Capital granted us the right at any time or times prior to April 30, 2017 to require Aspire Capital to enter into up to two common stock purchase agreements, each having a term of up to 24 months and collectively requiring Aspire Capital to purchase up to $10 million in the aggregate of our common stock (or such lesser amount as we may determine) on an ongoing basis when required by URI. As consideration for Aspire Capital entering into the option agreement, we issued 75,000 shares of our common stock to Aspire Capital.

Special Meeting of Stockholders

URI held a special meeting of stockholders at which our stockholders approved an amendment to the our Restated Certificate of Incorporation to effect a reverse stock split of our issued and outstanding common stock by a ratio of not less than 1-for-2 and not more than 1-for-20, such ratio to be determined in the discretion of the Board of Directors at any time on or before July 31, 2016. URI also received stockholder approval for a reduction in the number of authorized shares of our common stock if the reverse stock split is implemented. The special meeting, as previously adjourned, was held on February 11, 2016.