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Paycheck Protection Program Loan - Additional information (Detail) - Paycheck Protection Program Loan [Member] - USD ($)	9 Months Ended
	Oct. 31, 2020	May 06, 2020
Percent of loan to be forgiven	40.00%
Green wood Credit Union [Member]
Debt instrument face amount		$ 4,400,000
Loan, payment terms	The PPP Loan, which will mature on May 6, 2022, is unsecured and bears interest at a rate of 1.0% per annum, accruing from the loan date, and is payable monthly.
Loan, maturity date	May 06, 2022
Loan, interest rate	1.00%
Loan, payments due	$ 0
Green wood Credit Union [Member] | Other Expense [Member]
Loan, interest accrued	$ 22,000

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