Severance Arrangements (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Restructuring and related activities description	In the nine months ended September 2019, we completed the development work under the April 2017 contract, therefore, to better align our resources to support our business needs, we reduced our workforce by approximately 27%. In the three months ended June 30, 2019, we recorded expenses related to severance of approximately $300,000 to research and development expense and approximately $90,000 to sales, marketing, and general and administrative expense. We paid $284,000 during the three months ended September 30, 2019 related to the severance agreements for these employees. We plan to make the remaining severance payments during the fourth quarter of 2019.
Payments for restructuring	$ 284,000
Research and Development
Restructuring charges		$ 300,000
Sales, Marketing and General and Administrative
Restructuring charges		$ 90,000