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 and credit carryforwards	$ 69,718	$ 54,966
Accrued liabilities	4,184	4,271
Allowance for doubtful accounts	217	400
Deferred revenue	408	832
Accrued compensation	1,301	1,081
Long-term lease liabilities	1,992
Intangibles	88	4
Gross deferred tax assets	77,908	61,554
Valuation allowance	(59,939)	(47,127)
Net deferred tax assets	17,969	14,427
Deferred tax liabilities:
Property and equipment	(384)	(370)
Amortized intangibles	(68)	(155)
Other	(58)	0
Right of use assets	(1,755)
Deferred compensation - Current	(5,017)	0
Convertible senior notes	(10,687)	(13,902)
Gross deferred tax liabilities	(17,969)	(14,427)
Net deferred taxes	$ 0	$ 0