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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 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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