8. Commitments and Contingencies

Lease and rent obligations

Our commitments include obligations outstanding under operating leases, which expire through 2021. We have lease commitments for office space in Bellevue, Washington; Boston, Massachusetts; Taipei, Taiwan; and Trowbridge, UK.

In August 2013, we amended the lease agreement for our Bellevue, Washington headquarters, and extended the term of the original lease that was scheduled to expire in August 2014 to May 2020.

Rent expense was $211,000 and $253,000 for the three months ended September 30, 2018 and 2017, respectively, and $695,000 and $786,000 for the nine months ended September 30, 2018 and 2017, respectively.

Future operating lease commitments are as follows by calendar year (in thousands):

	September 30, 2018
Remainder of 2018	$	312
2019		1,246
2020		646
2021		48
Total commitments	$	2,252

Loss Contingencies

From time to time, we are subject to legal proceedings, claims, and litigation arising in the ordinary course of business including tax assessments. We defend ourselves vigorously against any such claims. When (i) it is probable that an asset has been impaired or a liability has been incurred and (ii) the amount of the loss can be reasonably estimated, we record the estimated loss. We provide disclosure in the notes to the consolidated financial statements for loss contingencies that do not meet both conditions if there is a reasonable possibility that a loss may have been incurred that would be material to the financial statements. Significant judgment is required to determine the probability that a liability has been incurred and whether such liability is reasonably estimable. We base accruals on the best information available at the time, which can be highly subjective. The final outcome of these matters could vary significantly from the amounts included in the accompanying consolidated financial statements.