Commitments and Contingencies - Schedule of Maturities of Operating Lease Liabilities (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Operating lease, 2019	$ 1,567
Operating lease, 2020	3,330
Operating lease, 2021	3,413
Operating lease, 2022	3,497
Operating lease, 2023	3,378
Operating lease, Thereafter	1,744
Operating Lease, Total lease payments	16,929
Less: Operating lease, Effects of discounting	(3,871)
Operating lease, Present value of lease liabilities	13,058
Less: Operating lease, current portion	(2,022)
Operating lease, Long-term lease liabilities	$ 11,036
Operating Lease, Weighted-average remaining lease term	5 years
Operating Lease, Weighted-average incremental borrowing rate	11.00%
Financing lease, 2019	$ 17
Financing lease, 2020	34
Financing lease, 2021	35
Financing lease, 2022	9
Financing lease, Total lease payments	95
Less: Financing lease, Effects of discounting	(29)
Financing lease, Present value of lease liabilities	66
Less: Financing lease, current portion	(19)
Financing lease, Long-term lease liabilities	$ 47
Financing lease, Weighted-average remaining lease term	2 years 9 months 18 days
Financing lease, Weighted-average incremental borrowing rate	23.00%
Remaining Lease Payments, 2019	$ 1,584
Remaining Lease Payments, 2020	3,364
Remaining Lease Payments, 2021	3,448
Remaining Lease Payments, 2022	3,506
Remaining Lease Payments, 2023	3,378
Remaining Lease Payments, Thereafter	1,744
Total lease payments	17,024
Less: Effects of discounting	(3,900)
Present value of lease liabilities	13,124
Less: current portion	(2,041)
Long-term lease liabilities	$ 11,083