12. Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Lease cost

	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Operating lease cost	$	134	$	402
Short-term lease cost		6		16
Variable lease cost		31		94
Total lease cost	$	171	$	512

Supplemental cash flow information related to leases

	Three Months Ended September 30, 2019		Nine Months  Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows (fixed payments)	$	118	$	354
Operating cash flows (liability reduction)		78		234
Right-of-use assets obtained in exchange for lease obligations:
Operating leases		—		2,840

Other information related to operating leases

	September 30, 2019
Weighted average remaining lease term (in years)		7.61
Weighted average discount rate		5.50	%

Maturity of lease liabilities

	September 30, 2019
Remaining three months of 2019	$	118
2020		401
2021		431
2022		439
2023		448
Thereafter		1,379
Total payments		3,216
Less: imputed interest		658
Total liability	$	2,558