Debt	12 Months Ended
Dec. 31, 2018
Warrants Expiring March 2023, Tranche 2 [Member]
Debt	6. DEBT Credit Facility On October 17, 2014 (the "Closing Date"), the Company entered into the Credit Facility with the Lenders, pursuant to which the Lenders agreed, subject to certain conditions, to make term loans totaling up to $10.0 million available to the Company. The first $5.0 million term loan was funded on the Closing Date. A second term loan of $5.0 million was funded at the Company's request on July 23, 2015. The first and second term loans had annual interest rates of 7.95% and 8.01%, respectively. The repayment schedule provided for interest-only payments in arrears until November 2015, followed by consecutive equal monthly payments of principal and interest in arrears through the original maturity date, which was October 1, 2018 (the "Maturity Date"). On the Closing Date, the Company issued warrants to purchase up to an aggregate of 646 shares of common stock at an exercise price of $387.00 per share to the Lenders. On July 23, 2015, in connection with the funding of the second term loan, the Company issued additional warrants to purchase up to an aggregate of 508 shares of common stock at an exercise price of $492.00 per share to the Lenders. The warrants were exercisable upon issuance and expire ten years from their dates of issuance. The warrants were classified in equity since they do not include provisions that would require the Company to repurchase its shares or cash settle, among other factors that would require liability classification. The fair value of the warrants at issuance of approximately $0.1 million was initially recorded as a discount to the principal balance and was being amortized over the life of the Credit Facility using the effective interest method. As a result of the prepayment of the Credit Facility in March 2017, the remaining discount was also written off. On March 8, 2017, pursuant to the Ferring Asset Purchase Agreement, the Company repaid to the Lenders all amounts due and owed in full under the Credit Facility. Per the Credit Facility, the Company was subject to a prepayment fee of up to 3% since prepaying the outstanding balance of the term loans in full prior to the Maturity Date. Upon repayment of each term loan, the Company was also required to make a final payment to the Lenders equal to 6% of the original principal amount of each term loan. This final payment had been partially accreted over the life of the Credit Facility using the effective interest method. The final payment included the outstanding balance of the term loans in full as well as (i) a prepayment fee of approximately 2%, or $0.1 million, (ii) a final payment equal to 6% of the original principal amount of each term loan, or $0.6 million, and (iii) per diem interest of approximately $0.05 million, for a total payment of $6.6 million. The Company's notes payable balance was zero for each of the years ended December 31, 2018 and 2017, respectively. The Company recognized interest expense related to the Credit Facility of $0 and $0.1 million during the years ended December 31, 2018 and 2017, respectively. Although the extinguishment of the debt was a closing condition of the Ferring Asset Purchase Agreement, since the Credit Facility was related to corporate debt, the loss on extinguishment and related interest expense is presented on the consolidated statements of operations as continuing operations.

Debt

12 Months Ended

Dec. 31, 2018

Warrants Expiring March 2023, Tranche 2 [Member]

6. DEBT

Credit Facility

On October 17, 2014 (the "Closing Date"), the Company entered into the Credit Facility with the Lenders, pursuant to which the Lenders agreed, subject to certain conditions, to make term loans totaling up to $10.0 million available to the Company. The first $5.0 million term loan was funded on the Closing Date. A second term loan of $5.0 million was funded at the Company's request on July 23, 2015. The first and second term loans had annual interest rates of 7.95% and 8.01%, respectively. The repayment schedule provided for interest-only payments in arrears until November 2015, followed by consecutive equal monthly payments of principal and interest in arrears through the original maturity date, which was October 1, 2018 (the "Maturity Date").

On the Closing Date, the Company issued warrants to purchase up to an aggregate of 646 shares of common stock at an exercise price of $387.00 per share to the Lenders. On July 23, 2015, in connection with the funding of the second term loan, the Company issued additional warrants to purchase up to an aggregate of 508 shares of common stock at an exercise price of $492.00 per share to the Lenders. The warrants were exercisable upon issuance and expire ten years from their dates of issuance. The warrants were classified in equity since they do not include provisions that would require the Company to repurchase its shares or cash settle, among other factors that would require liability classification. The fair value of the warrants at issuance of approximately $0.1 million was initially recorded as a discount to the principal balance and was being amortized over the life of the Credit Facility using the effective interest method. As a result of the prepayment of the Credit Facility in March 2017, the remaining discount was also written off.

On March 8, 2017, pursuant to the Ferring Asset Purchase Agreement, the Company repaid to the Lenders all amounts due and owed in full under the Credit Facility. Per the Credit Facility, the Company was subject to a prepayment fee of up to 3% since prepaying the outstanding balance of the term loans in full prior to the Maturity Date. Upon repayment of each term loan, the Company was also required to make a final payment to the Lenders equal to 6% of the original principal amount of each term loan. This final payment had been partially accreted over the life of the Credit Facility using the effective interest method. The final payment included the outstanding balance of the term loans in full as well as (i) a prepayment fee of approximately 2%, or $0.1 million, (ii) a final payment equal to 6% of the original principal amount of each term loan, or $0.6 million, and (iii) per diem interest of approximately $0.05 million, for a total payment of $6.6 million.

The Company's notes payable balance was zero for each of the years ended December 31, 2018 and 2017, respectively.

The Company recognized interest expense related to the Credit Facility of $0 and $0.1 million during the years ended December 31, 2018 and 2017, respectively. Although the extinguishment of the debt was a closing condition of the Ferring Asset Purchase Agreement, since the Credit Facility was related to corporate debt, the loss on extinguishment and related interest expense is presented on the consolidated statements of operations as continuing operations.