Three Months Ended June 30,

Six Months Ended June 30,

2021

2020

2021

2020

Components of lease cost

Finance lease cost components:

Amortization of finance lease assets

$

254

$

156

$

440

$

285

Interest on finance lease liabilities

105

48

173

74

Total finance lease costs

359

204

613

359

Operating lease cost components:

Operating lease cost

760

811

1,519

1,576

Short-term lease cost

178

155

374

287

Variable lease cost (1)

197

193

427

388

Sublease income

(46

)

(45

)

(92

)

(90

)

Total operating lease costs

1,089

1,114

2,228

2,161

Total lease cost

$

1,448

$

1,318

$

2,841

$

2,520

Supplemental cash flow information related to our operating leases is as follows for the six months ended June 30, 2021 and 2020:

Cash paid for amounts included in the measurement of lease liabilities:

Operating cash outflow from operating leases

$

1,800

$

1,764

Weighted-average remaining lease term-finance leases at end of period (in years)

2.2

1.8

Weighted-average remaining lease term-operating leases at end of period (in years)

9.3

10.4

Weighted-average discount rate-finance leases at end of period

8.6

%

9.0

%

Weighted-average discount rate-operating leases at end of period

8.5

%

8.8

%