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Note 4 - Debt (Details Textual) - USD ($)					1 Months Ended	3 Months Ended			6 Months Ended		9 Months Ended			12 Months Ended
	Apr. 30, 2020	Jan. 11, 2019	Oct. 08, 2018	Jun. 08, 2018	Sep. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2017
Proceeds from Issuance or Sale of Equity, Total					$ 1,500,000
Other Income, Paycheck Protection Program Grant						$ 247,554	$ 800,000				$ 1,047,700
Deferred Other Income Liability					0	0					0
Flexo Universal [Member]
Long-term Debt, Total					1,750,000	1,750,000					1,750,000
Line of Credit [Member] | Flexo Universal [Member]
Extinguishment of Debt, Amount											260,000
Promissory Note [Member] | John H Schwan [Member]
Due to Related Parties, Total															$ 1,099,000
Interest Payable															400,000
Debt Conversion, Original Debt, Amount		$ 600,000
Debt Conversion, Converted Instrument, Shares Issued (in shares)		181,000
Repayments of Related Party Debt									$ 0					$ 0
Interest Expense, Debt, Total											49,000	$ 46,000
Three Lines of Credit [Member] | Flexo Universal [Member]
Long-term Line of Credit, Total					$ 260,000	$ 260,000					$ 260,000
Paycheck Protection Program CARES Act [Member]
Proceeds from Issuance of Debt	$ 1,047,700
PNC [Member] | PNC Agreements [Member]
Debt Instrument, Temporary Over-Advance										$ 1,200,000
Debt Instrument, Temporary Over-Advance, End Balance										$ 0
Debt Instrument, Temporary Over-Advance, Term (Week)										42 days
Debt instrument, Amendment Fee										$ 250,000
Debt Instrument, Interest Rate, Increase (Decrease)				2.00%
PNC [Member] | PNC Agreements [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity															18,000,000
PNC [Member] | PNC Agreements [Member] | Term Loan [Member]
Long-term Debt, Total															$ 6,000,000
PNC [Member] | PNC Agreements, Amendment Two [Member]
Debt Instrument, Funding Proceeds Used to Repay Term Loan			$ 2,000,000										$ 5,000,000
Debt Instrument, Covenant, Required Proceeds from Equity Issuance			7,500,000
Proceeds from Issuance or Sale of Equity, Total			$ 0

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- Definition

Amount of fee associated with the amendment of debt agreement.

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- Definition

The amount in debt convenants of required proceeds from equity issuance under a debt instrument.

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- Definition

The amount of funding proceeds that is required to be used to repay the term loan under the debt instrument.

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- Definition

The amount of temporary over-advance on debt instrument.

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- Definition

The ending balance of the temporary over-advance on debt instruments.

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- Definition

The amount of deferred income classified as other.

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The amount of revenue and income classified as other related to grants from the Paycheck Protection Program for payroll utility and rent payment.

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

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No definition available.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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Gross amount of debt extinguished.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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- Definition

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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- Definition

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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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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