12. Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Lease cost

	Three Months ended June 30, 2019		Six Months ended June 30, 2019
Operating lease cost	$	134	$	268
Short-term lease cost		6		10
Variable lease cost		31		63
Total lease cost	$	171	$	341

Supplemental cash flow information related to leases

	Three Months ended June 30, 2019		Six Months ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows (fixed payments)	$	118	$	236
Operating cash flows (liability reduction)		78		156
Right-of-use assets obtained in exchange for lease obligations:
Operating leases		—		2,840

Other information related to operating leases

	June 30, 2019
Weighted average remaining lease term (in years)		7.91
Weighted average discount rate		5.50	%

Maturity of lease liabilities

	June 30, 2019
Remaining six months of 2019	$	236
2020		401
2021		431
2022		439
2023		448
Thereafter		1,394
Total payments		3,349
Less: imputed interest		697
Total liability	$	2,652