Note 12 - Related Party Transactions (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 231,000	$ 223,000
Notes Payable, Other Payables [Member]
Debt Instrument, Unamortized Discount, Total	222,000	305,000
MHW SPV II, LLC [Member] | Notes Payable, Other Payables [Member]
Notes Payable, Related Parties	945,000
Debt Instrument, Unamortized Discount, Total	53,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	128,000	120,000
MHW Partners [Member] | Notes Payable, Other Payables [Member]
Notes Payable, Related Parties	650,000
Debt Instrument, Unamortized Discount, Total	55,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 87,000	$ 82,000