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Extended period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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

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Decrease for amounts of indebtedness forgiven by the holder of the debt instrument.

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Fixed interest rate related to the interest rate derivative.

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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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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Note 9 - Debt and Credit Agreements (Details Textual) - USD ($) $ in Thousands						3 Months Ended	9 Months Ended	12 Months Ended
	Oct. 29, 2020	May 13, 2020	Apr. 15, 2020	Feb. 25, 2019	Oct. 26, 2016	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Feb. 28, 2022	Nov. 08, 2021	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2016
Long-term Debt, Total								$ 6,827
Long-term Debt, Current Maturities, Total								6,650	$ 1,406
Gain (Loss) on Extinguishment of Debt, Total								9,151	0
Development Corporation of Abilene Loan [Member]
Long-term Debt, Total									228			$ 114		$ 570
Debt Instrument, Decrease, Forgiveness								114	114
Notes Payable, Total								186	163
Notes Payable, Other Payables [Member]
Long-term Debt, Total								274	163
Long-term Debt, Current Maturities, Total								$ 186	161
Debt Instrument, Interest Rate, Stated Percentage								4.00%
Paycheck Protection Program CARES Act [Member]
Long-term Debt, Total								$ 0	$ 9,151
Proceeds from Issuance of Long-term Debt, Total			$ 9,530
Repayments of Long-term Debt, Total		$ 379
Gain (Loss) on Extinguishment of Debt, Total						$ 9,151
Interest Rate Swap [Member]
Derivative Liability, Notional Amount													$ 6,000
Derivative, Fixed Interest Rate													2.13%
Minimum [Member] \| Notes Payable, Other Payables [Member]
Debt Instrument, Periodic Payment, Total							$ 1
Maximum [Member] \| Notes Payable, Other Payables [Member]
Debt Instrument, Periodic Payment, Total							$ 16
Revolving Credit Facility [Member]
Debt Instrument, Term (Year)					3 years
Long Term Debt Extended Term (Year)				3 years
Line of Credit Facility, Maximum Borrowing Capacity				$ 35,000
Line of Credit Facility Borrowing Restriction Percentage of Receivables				85.00%
Line of Credit Facility Borrowing Restriction Percentage of Inventories				50.00%
Line of Credit Facility Borrowing Restriction Percentage of Orderly Liquidation Value of Inventories				85.00%
Line of Credit Facility Borrowing Minimum Restriction Value				$ 12,500
Line of Credit Facility Borrowing Restriction Percentage of Orderly Liquidation Value of Machinery and Equipment				75.00%
Line of Credit Facility Borrowing Restriction Percentage of Mortgaged Property				50.00%
Line of Credit Facility Borrowing Restriction Value				$ 12,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.50%
Reserve to Revolving Loan Availability											$ 5,000
Long-term Line of Credit, Total								6,350
Line of Credit Facility, Remaining Borrowing Capacity								$ 14,037
Revolving Credit Facility [Member] \| Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity										$ 30,000
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 10,000
Letter of Credit [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Letter of Credit [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%
Letter of Credit [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Letter of Credit [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.75%