Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases
Cash balance maintained to secure a letter of credit associated with a real estate lease	$ 424
Presentation of leases in condensed consolidated balance sheets:
Operating lease assets	7,875
Finance lease assets, net	1,602
Total lease assets	9,477
Operating lease liabilities, current	1,814
Current finance lease liability	$ 159
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedExpensesAndOtherCurrentLiabilities
Total current lease liabilities	$ 1,973
Non-current operating lease liability	5,290
Non-current finance lease liability	$ 367
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total non-current lease liabilities	$ 5,657
Total lease liabilities	7,630
Right-of-use asset derecognized	200
Lease liability derecognized	$ 200
Minimum
Leases
Remaining lease term (in years)	1 year
Maximum
Leases
Remaining lease term (in years)	4 years