Income Taxes -Tax provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loss before Income taxes:
Domestic	$ (20,935)	$ (15,313)
Foreign	(377)	(216)
Loss before income taxes	(21,312)	(15,529)
Deferred
Domestic	(7,085)	(4,283)
Foreign	(94)	(54)
Total deferred tax provision (benefit)	(7,179)	(4,337)
Change in valuation allowance - Domestic	7,085	4,283
Change in valuation allowance - Foreign	94	$ 54
Total tax provision (benefit)	$ 0