Commitments and Contingencies (Tables)

3 Months Ended

Feb. 28, 2017

Total Minimum Lease and Easement Commitments under Land use Agreements

The total minimum lease and easement commitments at February 28, 2017 under these land use agreements are as follows:

(in thousands)	2017 (remaining nine months)		2018		2019		2020		2021		Thereafter		Total
Land use payments	$	871	$	1,329	$	1,686	$	1,742	$	1,782	$	56,249	$	63,659

Summary of Asset Retirement Obligations

The following table summarizes ARO activity for the three months ended February 28, 2017 and February 29, 2016, respectively:

	Three Months Ended
	February 28,		February 29,
(in thousands)	2017		2016
Balance at the beginning of the period	$	13,448	$	9,992
ARO assumed in acquisition		493		547
Accretion expense		171		119
Revisions to ARO during the period		17		—
Balance at the end of the period	$	14,129	$	10,658

Solar Power System Performance Warranty

Summary of Accrued Warranty Activity

The following table summarizes accrued system output performance warranty activity for the three months ended February 28, 2017 and February 29, 2016, respectively:

	Three Months Ended
	February 28,			February 29,
(in thousands)	2017			2016
Balance at the beginning of the period	$	196		$	237
Settlements during the period		(29	)		(76	)
Adjustments during the period		(29	)		65
Balance at the end of the period	$	138		$	226