License Agreements and Acquired Product Rights	9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
License Agreements and Acquired Product Rights	7. License agreements and acquired product rights: *Purdue license and supply agreement:* On July 12, 2017, the Company, along with Purdue Pharma, an Ontario limited partnership (“Purdue”), announced that they had executed an exclusive agreement granting to Purdue the licensing, distribution, marketing and sale rights related to BELBUCA^® in Canada. Financial terms of the Purdue agreement include: (i) total upfront and other cash milestone payments (ii) a low double digit percent royalty payable quarterly by Purdue to the Company based on Canadian net sales of BELBUCA^® (iii) an annual royalty fee commencing a period of time after the commercial launch of BELBUCA^® in Canada, which fee is creditable against royalties payable by Purdue and subject to reduction in certain circumstances; and (iv) payment by Purdue of certain costs incurred to obtain and transfer the marketing authorization for BELBUCA^® in Canada. On January 30, 2018, the Company and Purdue announced that BELBUCA^® was now commercially available in Canada. The first commercial sale of BELBUCA^® in Canada triggered a milestone payment to the Company from Purdue in the amount of CAD 1 million (US $0.8 million), which the Company received and recognized as revenue in March 2018. *TTY license and supply agreement* The Company has a license and supply agreement with TTY Biopharm Co., Ltd. (“TTY”) for the exclusive rights to develop and commercialize BEMA^® Fentanyl in the Republic of China, Taiwan. The Company received cumulative payments of $0.9 million from TTY during each of the nine month periods ended September 30, 2018 and 2017, respectively, related to royalties based on product purchased in Taiwan by TTY of PAINKYL^™ which is recorded in the accompanying condensed consolidated statement of operations.

7. License agreements and acquired product rights:

Purdue license and supply agreement:

On July 12, 2017, the Company, along with Purdue Pharma, an Ontario limited partnership (“Purdue”), announced that they had executed an exclusive agreement granting to Purdue the licensing, distribution, marketing and sale rights related to BELBUCA^® in Canada. Financial terms of the Purdue agreement include: (i) total upfront and other cash milestone payments (ii) a low double digit percent royalty payable quarterly by Purdue to the Company based on Canadian net sales of BELBUCA^® (iii) an annual royalty fee commencing a period of time after the commercial launch of BELBUCA^® in Canada, which fee is creditable against royalties payable by Purdue and subject to reduction in certain circumstances; and (iv) payment by Purdue of certain costs incurred to obtain and transfer the marketing authorization for BELBUCA^® in Canada.

On January 30, 2018, the Company and Purdue announced that BELBUCA^® was now commercially available in Canada. The first commercial sale of BELBUCA^® in Canada triggered a milestone payment to the Company from Purdue in the amount of CAD 1 million (US $0.8 million), which the Company received and recognized as revenue in March 2018.

TTY license and supply agreement

The Company has a license and supply agreement with TTY Biopharm Co., Ltd. (“TTY”) for the exclusive rights to develop and commercialize BEMA^® Fentanyl in the Republic of China, Taiwan.

The Company received cumulative payments of $0.9 million from TTY during each of the nine month periods ended September 30, 2018 and 2017, respectively, related to royalties based on product purchased in Taiwan by TTY of PAINKYL^™ which is recorded in the accompanying condensed consolidated statement of operations.