Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt discount.

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Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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Notes Payable - Schedule of Notes Payable (Detail) - USD ($)	Feb. 01, 2021	Jan. 31, 2021	Jan. 30, 2021	May 02, 2020	Feb. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	May 31, 2019	Nov. 30, 2018	Oct. 31, 2018	Jan. 31, 2018
Debt Instrument [Line Items]
Total face amount			$ 4,348,000		$ 16,359,000
Unamortized discount					(2,674,000)						$ (271,000)
Total carrying value			4,348,000		13,685,000
Amount classified as current			2,478,000		13,685,000
Amount classified as long-term			1,870,000
0% Convertible Note Due January 2021 [Member]
Debt Instrument [Line Items]
Total face amount					91,000
6% Promissory Note Due December 2020 [Member]
Debt Instrument [Line Items]
Total face amount					500,000
12% Convertible Notes Due October 2019 [Member]
Debt Instrument [Line Items]
Total face amount					1,775,000
Unamortized discount										$ (1,942,000)
12% Convertible Notes Due November 2019 [Member]
Debt Instrument [Line Items]
Total face amount		$ 400,000			400,000	$ 400,000
Unamortized discount									$ (118,000)
12% Convertible Notes Due May 2020 [Member]
Debt Instrument [Line Items]
Total face amount					1,500,000
Unamortized discount								$ (940,000)
12% Convertible Notes Due July, August and September 2020 [Member]
Debt Instrument [Line Items]
Total face amount	$ 4,235,000				4,235,000	$ 4,235,000
Unamortized discount				$ (4,368,000)			$ (4,368,000)
12% Secured Promissory Note Due September 2020 [Member]
Debt Instrument [Line Items]
Total face amount					$ 7,858,000
6% Promissory Note Due February 2024 [Member]
Debt Instrument [Line Items]
Total face amount			1,250,000
1% Promissory Note Due April 2022 [Member]
Debt Instrument [Line Items]
Total face amount			$ 3,098,000