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FreshRealm (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Dec. 15, 2018	Jan. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018	Oct. 31, 2018
Variable Interest Entity [Line Items]
Investment in unconsolidated entities			$ 15,370			$ 15,370		$ 24,805
Income (loss) from unconsolidated entities						(9,435)	$ 278
Loans to FreshRealm			24,680			24,680
FreshRealm [Member]
Variable Interest Entity [Line Items]
Investment in unconsolidated entities			10,300			10,300		19,900
Net loss			(7,371)		$ (7,412)	(18,749)	$ (13,800)
Income (loss) from unconsolidated entities	$ (4,200)	$ (2,700)	(2,700)	$ (6,900)
Loans to FreshRealm			$ 24,700			$ 24,700		$ 9,000
FreshRealm [Member] | FreshRealm [Member]
Variable Interest Entity [Line Items]
VIE ownership (as a percent)	100.00%	37.00%	37.00%			37.00%		37.00%

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The amount of net income (loss) reported by an equity method investment of the entity.

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