Commitments and Contingencies (Tables)

12 Months Ended

Nov. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Total Minimum Lease and Easement Commitments under Land use Agreements

The total minimum lease and easement commitments at November 30, 2017 under these land use agreements are as follows:

(in thousands)	2018		2019		2020		2021		2022	Thereafter		Total
Land use payments	$	1,329	$	1,686	$	1,742	$	1,782	$1,822	$	54,590	$	62,951

Summary of Accrued Warranty Activity

The following table summarizes accrued solar power systems performance warranty activities:

	Year Ended
(in thousands)	November 30, 2017			November 30, 2016
Balance at the beginning of the period	$	196		$	237
Settlements during the period	(85		)	(285		)
Adjustments during the period	(66		)	244
Balance at the end of the period	$	45		$	196

Summary of Asset Retirement Obligations

The following table summarizes ARO activities:

	Year Ended
(in thousands)	November 30, 2017			November 30, 2016
Balance at the beginning of the period	$	13,448		$	9,992
ARO assumed in acquisition	772			2,989
Accretion expense	762			539
Revisions to ARO during the period	(12		)	(72		)
Balance at the end of the period	$	14,970		$	13,448