Note 7 - Related Party Transactions (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Interest Paid, Excluding Capitalized Interest, Operating Activities			$ 126,000	$ 116,000
Notes Payable, Other Payables [Member]
Debt Instrument, Unamortized Discount, Total	$ 268,000		268,000		$ 305,000
MHW SPV II, LLC [Member] | Notes Payable, Other Payables [Member]
Notes Payable, Related Parties	945,000		945,000
Debt Instrument, Unamortized Discount, Total	56,000		56,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	32,000	$ 29,000	62,000	59,000
MHW Partners [Member] | Notes Payable, Other Payables [Member]
Notes Payable, Related Parties	650,000		650,000
Debt Instrument, Unamortized Discount, Total	59,000		59,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 22,000	$ 20,000	$ 43,000	$ 40,000