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Eligible cash.

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Excess availability of greater than which the fixed charge coverage ratio is triggered.

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Excess availability of net order liquidation value amount.

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Lender commitments threshold trigger excess availability amount.

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Net proceeds received allocated to derivative liability.

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Transaction costs.

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Face amount or stated value per share of common stock.

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Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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

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Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Note 8 - Debt and Finance Leases (Details Textual) - USD ($)					3 Months Ended		12 Months Ended
	Mar. 27, 2020	Mar. 26, 2020	May 24, 2019	May 20, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 27, 2020	Jan. 26, 2020
Debt And Capital Leases [Line Items]
Common stock, par value				$ 0.01	$ 0.01		$ 0.01
Proceeds from borrowings						$ 14,000,000
Fair value of derivative liability					$ 5,000,000		$ 52,000,000
Term Credit Agreement [Member]
Debt And Capital Leases [Line Items]
Prepayment of principal amount			$ 83,000,000
Convertible Notes [Member]
Debt And Capital Leases [Line Items]
Debt instrument, maturity date, description					The maturity date of the Convertible Notes is initially November 1, 2021. The Company has the option to extend the maturity of the Convertible Notes by up to three years in the event that the Series A Preferred Stock is refinanced with debt or equity or the mandatory redemption date of the Series A Preferred Stock is extended.
Debt instrument, maturity date					Nov. 01, 2021
Net proceeds received to derivative liability				$ 14,000,000
Carrying value of stock at issuance				84,000,000
Proceeds from borrowings			$ 100,000,000
Fair value of derivative liability				14,000,000
Transaction costs				2,000,000
5.00% Secured Convertible Notes Due 2021 [Member]
Debt And Capital Leases [Line Items]
Secured convertible notes				$ 100,000,000
Secured convertible notes, interest rate				5.00%	5.00%
ABL Credit Agreement [Member]
Debt And Capital Leases [Line Items]
Line of credit facility, maximum borrowing capacity	$ 110,000,000							$ 120,000,000	$ 150,000,000
Lender commitments, threshold trigger, excess availability amount	$ 13,750,000				$ 13,750,000		18,750,000	$ 15,000,000	$ 18,750,000
Long-term line of credit					80,000,000		80,000,000
Excess availability amount					$ 17,000,000		$ 22,000,000
Excess availability of greater than which the fixed charge coverage ratio is triggered					12.50%		12.50%
Excess availability and equipment availability combined with increases in available accounts receivable and inventory allowed to decrease eligible cash					$ 13,000,000
Excess availability percentage of lender commitments threshold triggering cash dominion control					12.50%
ABL Credit Agreement [Member] \| Restricted Cash [Member]
Debt And Capital Leases [Line Items]
Eligible cash					$ 3,000,000		$ 22,000,000
Amended Credit Facility [Member]
Debt And Capital Leases [Line Items]
Excess availability, calculation, percentage of eligible equipment	75.00%				70.00%
Excess availability, net orderly liquidation equipment amount	$ 6,000,000				$ 14,750,000
Decrease in excess availability net orderly liquidation equipment amount					$ 1,000,000
Debt instrument, amendment description					The $14.75 million amount decreases by $1 million per quarter starting on July 1, 2020 until maturity or the amount is decreased to $0, whichever comes first.
Amended Credit Facility [Member] \| Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt And Capital Leases [Line Items]
Debt instrument, basis spread on variable rate	3.50%	2.25%
Amended Credit Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Debt And Capital Leases [Line Items]
Debt instrument, basis spread on variable rate	2.50%	1.25%
Amended Credit Facility [Member] \| Maximum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt And Capital Leases [Line Items]
Debt instrument, basis spread on variable rate	4.00%	2.75%
Amended Credit Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Debt And Capital Leases [Line Items]
Debt instrument, basis spread on variable rate	3.00%	1.75%