Note 5 - Debt (Details Textual) - USD ($) | | | | | | | | | | 1 Months Ended | 12 Months Ended | 16 Months Ended | | | |
Dec. 18, 2023 | Oct. 23, 2023 | Sep. 06, 2023 | Sep. 05, 2023 | Aug. 14, 2023 | Jun. 30, 2023 | May 01, 2023 | Aug. 11, 2022 | Jun. 01, 2022 | Jul. 31, 2023 | Aug. 31, 2022 | Apr. 30, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2023 | Aug. 22, 2022 | Jun. 30, 2022 | Jun. 24, 2020 |
Factoring Agreement, Advance Amount, Percentage of Accounts Receivable | | | | | | | | | | | | | 85% | | | 85% | | 85% | |
Factoring Agreement, Factoring Fee, First Thirty Days, Percentage of Invoice Face Value | | | | | | | | | | | | | 0.98% | | | 0.98% | | | |
Factoring Agreement, Factoring Fee, After Thirty Days, Percentage of Invoice Face Value | | | | | | | | | | | | | 0.0327% | | | 0.0327% | | | |
Factoring Agreement, Minimum Invoice Fee | | | | | | | | | | | | | $ 1.5 | | | $ 1.5 | | | |
Stock Issued During Period, Value, New Issues | | | | | | | | | | | | | 5,440,658 | $ 4,765,232 | | | | | |
Stock Issued During Period, Shares, New Issues (in shares) | | | | | | | | | | | | | | | 5,524,534 | | | | |
Salem Loan Facility [Member] | | | | | | | | | | | | | | | | | | | |
Long-Term Line of Credit | | $ 1,250,000 | $ 1,750,000 | | $ 1,500,000 | $ 5,500,000 | $ 1,500,000 | $ 5,000,000 | | | | | 12,000,000 | | | 12,000,000 | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | | | | | | $ 8,000,000 | | | | | | | | | | | |
Line of Credit Facility, Interest Rate During Period, Paid-in-Kind | | | | | | | 3% | 2% | | | | | | | | | | | |
Common Stock, Shares, Issued as Consideration (in shares) | | | | | | | | 25,000 | | | | | | | | | | | |
Line of Credit Facility, Remaining Borrowing Capacity | $ 1,000,000 | | | | | | | $ 3,000,000 | | | | | | | | | | | |
Line of Credit Facility, Interest Rate During Period | | | | | | | 14% | 13% | | | | | | | | | | | |
Line of Credit Facility, Interest Rate During Period, Paid in Cash | | | | | | | 11% | | | | | | | | | | | | |
Debt Instrument, Fee Amount | $ 45 | $ 43,000,000 | $ 88,000 | | $ 45,000 | | $ 60,000 | | | | | | | | | | | | |
Stock Issued During Period, Value, New Issues | | | | | | | 12,500 | | | | | | | | | | | | |
Common Stock, Value, Issued as Consideration | | | | | | | $ 1,500,000 | | | | | | | | | | | | |
Line of Credit Facility, Allocated Interest Rate | 26% | 21% | 104% | | 28% | | 17% | | | | | | | | | | | | |
Extinguishment of Debt, Prepaid Premium Year 1, Percentage | | | | | | | | 3% | | | | | | | | | | | |
Extinguishment of Debt, Prepaid Premium Year 2, Percentage | | | | | | | | 2% | | | | | | | | | | | |
Extinguishment of Debt, Prepaid Premium Year 3, Percentage | | | | | | | | 1% | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | 14% | 14% | | | | | | | | | | | | | | |
Debt Issuance Cost, Gross, Noncurrent | | | | | $ 78,000 | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, New Issues (in shares) | | | 660,000 | | 400,000 | | | | | | | | | | | | | | |
Line of Credit Facility, Additional Maximum Borrowing Capacity | | | | $ 4,000,000 | | | | | | | | | | | | | | | |
Proceeds from Lines of Credit | | | $ 1,750,000 | | | | | | | | | | | | | | | | |
Salem Loan Facility [Member] | AMB Investments, LLC, Participation Rights in Underlying Loan [Member] | | | | | | | | | | | | | | | | | | | |
Long-Term Line of Credit | | | | | | $ 2,600,000 | | | | | | | | | | | | | |
Stock Issued During Period, Shares, New Issues (in shares) | | | | | | 500,000 | | | | | | | | | | | | | |
Participation Interest in Underlying Loan, Ownership Percentage | | | | | | 47.17% | | | | | | | | | | | | | |
Salem Loan Facility [Member] | Minimum [Member] | | | | | | | | | | | | | | | | | | | |
Line of Credit Facility, Allocated Interest Rate | | | | 29% | | | | | | | | | | | | | | | |
Salem Loan Facility [Member] | Maximum [Member] | | | | | | | | | | | | | | | | | | | |
Line of Credit Facility, Allocated Interest Rate | | | | 98% | | | | | | | | | | | | | | | |
Factoring Agreement [Member] | | | | | | | | | | | | | | | | | | | |
Long-Term Debt, Gross | | | | | | | | | | | | | 0 | | | 0 | | | |
Spectrum Loan Facility [Member] | | | | | | | | | | | | | | | | | | | |
Percent, Cost of Eligible Equipment | | | | | | | | | 75% | | | | | | | | | | |
Monthly Reduction of Maximum Funds Available to Purchase Eligible Equipment, Percentage | | | | | | | | | 0.021% | | | | | | | | | | |
Percent, Net Amount of Eligible Inventory | | | | | | | | | 50% | | | | | | | | | | |
Additional Amount Allowed to be Borrowed | | | | | | | | | $ 350,000 | | | | | | | | | | |
Percent of Purchased Accounts Receivable Outstanding | | | | | | | | | 50% | | | | | | | | | | |
Percent of Eligible Accounts Receivable | | | | | | | | | 85% | | | | | | | | | | |
Proceeds from Accounts Receivable Factoring | | | | | | | | | $ 3,000,000 | | | | 3 | | | | | | |
Annual Facility Fees | | | | | | | | | $ 30,000 | | | | | | | | | | |
Debt Instrument, Base Floor | | | | | | | | | 7% | | | | | | | | | | |
Long-Term Line of Credit | | | | | | | | | | | | | 1.2 | | | 1.2 | | | |
Interest Expense | | | | | | | | | | | | | 244 | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | | | | | | | | | | | $ 3,000,000 | | | $ 3,000,000 | | | |
Spectrum Loan Facility [Member] | Prime Rate [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | | 3.50% | | | | | | | | | | |
SBA, Economic Injury Disaster Loan (EIDL) [Member] | | | | | | | | | | | | | | | | | | | |
Long-Term Debt, Gross | | | | | | | | | | | | | | | | | $ 149,900 | | |
Debt Instrument, Fee Amount | | | | | | | | | | | | | | | | | | | $ 150,000 |
Interest Payable | | | | | | | | | | | | | | | | | $ 12,000 | | |
Convertible Promissory Notes [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 790,000 | | | | | | | | | |
Convertible Note, Repayment Amount, Percent of Amount Due, Benchmark | | | | | | | | | | 20% | | | | | | | | | |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | | | | | | | | | | $ 6 | | | | | | | | | |
Convertible Promissory Notes [Member] | Put Option [Member] | | | | | | | | | | | | | | | | | | | |
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral | | | | | | | | | | $ 15,800 | | | | | | | | | |
Convertible Promissory Notes [Member] | New Equity Financing [Member] | | | | | | | | | | | | | | | | | | | |
Minimum Gross Proceeds Received From Issuance of Equity Securities for Conversion of Note | | | | | | | | | | 2,000,000 | | | | | | | | | |
Convertible Promissory Notes [Member] | Chief Executive Officer and Family Members [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | 710,000 | | | | | | | | | |
Convertible Promissory Notes [Member] | Chief Executive Officer [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | 80,000 | | | | | | | | | |
Convertible Promissory Notes [Member] | Chief Executive Officer Family Members [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 630,000 | | | | | | | | | |
Convertible Notes, One [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | 8% | | | 9.40% | | | 9.40% | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 290,000 | | | $ 290,000 | | | $ 290,000 | | | |
Convertible Notes, Two [Member] | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | 16% | | | 17.40% | | | 17.40% | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 500,000 | | | $ 500,000 | | | $ 500,000 | | | |
Financing Arrangement Related to Furniture for New Office Facilities [Member] | | | | | | | | | | | | | | | | | | | |
Long-Term Debt, Gross | | | | | | | | | | | | | $ 360,000 | | | 360,000 | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | $ 1,100,000 | | | | | | | |
Debt Instrument, Periodic Payment, Interest | | | | | | | | | | | $ 17,000 | $ 496,000 | | | | | | | |
Debt Instrument, Periodic Payment, Principal | | | | | | | | | | | 246,000 | | | | | | | | |
Agreement With Landlord for Leasehold Improvements [Member] | | | | | | | | | | | | | | | | | | | |
Lease Improvements, Expected Total Cost | | | | | | | | | | | 7,700,000 | | | | | | | | |
Lease Improvements, Expected Total Cost, Payable | | | | | | | | | | | 3,500,000 | | | | | | | | |
Lease Improvements, Payments | | | | | | | | | | | $ 1,300,000 | | | | | $ 3,200,000 | | | |
Lease Improvements, Construction Deferral Fee, Percent | | | | | | | | | | | 2% | | | | | | | | |
Lease Improvements, Interest Rate | | | | | | | | | | | 18% | | | | | | | | |