Leases - Summary of Components of Lease Costs (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Finance lease costs:
Amortization of right-of-use assets	$ 972
Interest on finance lease liabilities	919
Operating lease costs	2,161
Short-term lease costs	255
Variable lease costs	749
Total lease costs	$ 5,056