Note 5 - Debt (Details Textual) - USD ($)				1 Months Ended			2 Months Ended	4 Months Ended	9 Months Ended
	Aug. 11, 2022	Jun. 01, 2022	Feb. 17, 2021	Sep. 30, 2022	Aug. 31, 2022	Apr. 30, 2022	Sep. 30, 2022	Aug. 31, 2022	Sep. 30, 2022	Dec. 31, 2021	Feb. 19, 2021	Jun. 24, 2020	Apr. 30, 2020
Factoring Agreement, Advance Amount, Percentage of Accounts Receivable				85.00%			85.00%		85.00%
Factoring Agreement, Factoring Fee, First Thirty Days, Percentage of Invoice Face Value				0.98%			0.98%		0.98%
Factoring Agreement, Factoring Fee, After Thirty Days, Percentage of Invoice Face Value				0.0327%			0.0327%		0.0327%
Factoring Agreement, Minimum Invoice Fee				$ 1.50			$ 1.50		$ 1.50
Short-Term Debt, Total				0			0		0
Accounts Receivable Secured Debt Facility		$ 3,000,000
Salem Loan Facility [Member]
Long-Term Line of Credit, Total	$ 5,000,000.0			5,000,000.0			5,000,000.0		5,000,000.0
Line of Credit Facility, Maximum Borrowing Capacity	8,000,000.0			$ 8,000,000.0			$ 8,000,000.0		$ 8,000,000.0
Line of Credit Facility, Remaining Borrowing Capacity	$ 3,000,000.0
Line of Credit Facility, Term (Year)	5 years
Line of Credit Facility, Interest Rate During Period	13.00%
Line of Credit Facility, Interest Rate During Period, Paid in Cash	11.00%
Line of Credit Facility, Interest Rate During Period, Paid-in-Kind	2.00%
Line of Credit Facility, Fee, Percentage	2.00%
Common Stock, Shares, Issued as Consideration (in shares)	150,000			150,000			150,000		150,000
Common Stock, Shares, Issuable as Consideration (in shares)	150,000
Extinguishment of Debt, Prepaid Premium Year 1, Percentage	3.00%
Extinguishment of Debt, Prepaid Premium Year 2, Percentage	2.00%
Extinguishment of Debt, Prepaid Premium Year 3, Percentage	1.00%
Interest Expense, Debt, Total							$ 92,000
Line of Credit, Net of Discount, Total				$ 4,500,000			4,500,000		$ 4,500,000
Common Stock, Value, Issued as Consideration				500,000			500,000		500,000
Spectrum Loan Facility [Member]
Percent, Cost of Eligible Equipment		75.00%
Monthly Reduction of Maximum Funds Available to Purchase Eligible Equipment, Percentage		0.021%
Percent, Net Amount of Eligible Inventory		50.00%
Additional Amount Allowed to be Borrowed		$ 350,000
Percent of Purchased Accounts Receivable Outstanding		50.00%
Percent of Eligible Accounts Receivable		85.00%
Accounts Receivable Secured Debt Facility		$ 3,000,000
Annual Facility Fees		$ 30,000
Debt Instrument, Base Floor		7.00%
Long-Term Line of Credit, Total				200,000			200,000		200,000
Interest Expense, Total									20,000
Spectrum Loan Facility [Member] | Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		3.50%
Financing Arrangement Related to Furniture for New Office Facilities [Member]
Debt Instrument, Face Amount						$ 1,100,000
Debt Instrument, Periodic Payment, Interest				4,000		$ 496,000		$ 17,000
Debt Instrument, Periodic Payment, Principal				24,000					246,000
Long-Term Debt, Gross				775,000			775,000		775,000
Agreement With Landlord for Leasehold Improvements [Member]
Lease Improvements, Expected Total Cost					$ 7,500,000			7,500,000
Lease Improvements, Expected Total Cost, Payable					3,500,000			$ 3,500,000
Lease Improvements, Payments					$ 1,300,000
Lease Improvements, Construction Deferral Fee, Percent					2.00%			2.00%
Lease Improvements, Interest Rate					18.00%			18.00%
SBA, Economic Injury Disaster Loan (EIDL) [Member]
Debt Instrument, Face Amount												$ 150,000
Long-Term Debt, Gross				149,900			149,900		149,900
Interest Payable				$ 12,000			$ 12,000		$ 12,000
Paycheck Protection Program CARES Act [Member]
Debt Instrument, Face Amount													$ 535,800
Long-Term Debt, Gross										$ 535,800
Interest Payable										$ 3,611
Debt Instrument, Decrease, Forgiveness			$ 535,800
The 2021 Paycheck Protection Program Cares Act [Member]
Debt Instrument, Face Amount											$ 833,300