Note 8 - Subsequent Events (Details Textual) - USD ($)		1 Months Ended
	Nov. 01, 2019	Jan. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Oct. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Feb. 07, 2019	Mar. 31, 2018
Financing Receivable, after Allowance for Credit Loss, Total									$ 7,400,000
Second A&R Note [Member]
Financing Receivable, before Allowance for Credit Loss, Total								$ 3,200,000
Financing Receivable, after Allowance for Credit Loss, Total						$ 1,300,000	$ 1,300,000
Loan Parties [Member] | Second A&R Note [Member] | Forecast [Member]
Proceeds from Collection of Finance Receivables		$ 130,000	$ 150,000	$ 200,000
Subsequent Event [Member] | Loan Parties [Member] | Second A&R Note [Member]
Proceeds from Collection of Finance Receivables	$ 220,000
Forbearance Period, Minimum Collateral Value	2,000,000
Forbearance Discontinued Payment, Amount Less the Sum of All Forbearance Period Payments and Payments Made, One	2,230,000
Forbearance Discontinued Payment, Amount Less the Sum of All Forbearance Period Payments and Payments Made, Two	$ 2,530,000
Financing Receivable, before Allowance for Credit Loss, Total					$ 3,100,000
Financing Receivable, after Allowance for Credit Loss, Total					$ 1,300,000