Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Schedule of Other Information related to Stamford Lease

Other information related to the Stamford Lease was as follows:

	Three Months Ended			Six Months Ended
	June 30, 2019			June 30, 2019
Cash paid for amounts included in    the measurement of lease    liability:
Operating cash outflows relating to    operating lease	$	(302	)	$	(603	)
ROU assets obtained in exchange    for new operating lease liabilities	$	—		$	3,636
Remaining lease term-operating    lease (years)	4.4			4.4
Discount rate - operating lease		7.0	%		7.0	%

Schedule of Future Minimum Lease Payments under Non-cancellable Operating Leases, Reconciliation of Undiscounted Cash Flows to the Operating Lease Liability

Future minimum lease payments under non-cancellable operating leases, as well as a reconciliation of these undiscounted cash flows to the operating lease liability as of June 30, 2019, were as follows:

Year Ending December 31,
2019 (Excluding the six months ended June 30, 2019)	$	613
2020		1,239
2021		1,264
2022		1,288
2023		1,164
Total future minimum lease payments, undiscounted		5,568
Less imputed interest		(796	)
Total	$	4,772
Operating lease liability reported as of June 30, 2019:
Operating lease liability - current	$	923
Operating lease liability - non-current		3,849
Total	$	4,772