Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Accrued Liabilities
Accrued compensation	$ 7,818	$ 1,833
Accrued professional fees	3,842	1,228
Accrued franchise and property taxes	37	44
Accrued other	174	296
Total other accrued liabilities	$ 11,871	$ 3,401