Income Taxes - Schedule of deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets:
Net operating loss (NOL)	$ 50,663	$ 29,634
Intangibles	1,252	1,407
Share-based compensation	2,704	83
Interest	0	148
Inventory reserve	1,509	0
Other	204	628
Total gross deferred tax assets	56,332	31,900
Deferred Tax liabilities:
Property, plant and equipment	(904)	(283)
Total gross deferred tax liabilities	(904)	(283)
Valuation allowance	55,428	31,617
Net deferred tax assets (liabilities)	$ 0	$ 0