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Long-term Debt - Long-term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2017	Jun. 28, 2018	Feb. 28, 2018
Mortgage Facility Tranche A [Member]
Debt Instrument [Line Items]
Interest rate		4.25%
Monthly installment		$ 230
Long-term debt, maturity date		Mar. 01, 2023
Mortgage Facility Tranche B [Member]
Debt Instrument [Line Items]
Monthly installment		$ 57
Minimum interest rate		4.25%	4.25%
Long-term debt, maturity date		Mar. 01, 2023
Unsecured Promissory Note [Member]
Debt Instrument [Line Items]
Unsecured promissory note, periodic payment,commencement date	2018-01
Unsecured promissory note, periodic payment, principal	$ 319
Selma Texas Facility Financing Obligation Due in Installments through September 1, 2031 [Member]
Debt Instrument [Line Items]
Monthly installment		$ 103
Long-term debt, maturity date		Sep. 01, 2031
Squirrel Brand [Member] | Unsecured Promissory Note [Member]
Debt Instrument [Line Items]
Unsecured promissory note, periodic payment,commencement date		2018-01
Unsecured promissory note, periodic payment, principal		$ 319
Interest rate		5.50%
Long-term debt, maturity date		Nov. 30, 2020

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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