Note 11 - Related Party Transactions (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 223,000	$ 273,000
Notes Payable, Other Payables [Member]
Debt Instrument, Unamortized Discount, Total	305,000	386,000
MHW SPV II, LLC [Member] | Notes Payable, Other Payables [Member]
Notes Payable, Related Parties	945,000
Debt Instrument, Unamortized Discount, Total	65,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	120,000	114,000
MHW Partners [Member] | Notes Payable, Other Payables [Member]
Notes Payable, Related Parties	650,000
Debt Instrument, Unamortized Discount, Total	68,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 82,000	$ 36,000