Restructuring - Narrative (Details)		1 Months Ended
	Nov. 28, 2018 USD ($) $ / shares	Jul. 31, 2018 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Expected savings amount		$ 3,000,000
Expected percentage of workforce reduction		20.00%
Severance payment	$ 864,000
Payment of other amounts due	$ 458,500
Exercise price (USD per share) | $ / shares	$ 7.01
Exercise period	90 days
Minimum
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated | employee		35
Maximum
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated | employee		40