Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets:
Reserves and accruals	$ 8,254	$ 4,880
Deferred revenue	1,219	1,201
Share-based compensation	2,955	1,259
Tax credit carryforward	11,307	2,484
Net operating losses	6,008	1,692
Depreciation and amortization	7,151	4,298
Operating lease right-of-use assets	4,965
Other	1,128	777
Gross deferred tax assets	42,987	16,591
Less: valuation allowance	(14,160)	(3,172)
Total deferred tax assets after valuation allowance	28,827	13,419
Deferred Tax Liabilities:
Depreciation and amortization	(89,286)	(609)
Operating lease liabilities	(4,709)
Other	(416)
Gross deferred tax liabilities	(94,411)	(609)
Net deferred tax (liabilities)	$ (65,584)
Net deferred tax assets		$ 12,810