Note 4 - Financing Arrangements - Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Long-term debt gross	$ 4,441	$ 4,612
Discount on Devicix Notes Payable		(23)
Debt issuance Costs	(162)	(185)
Total long-term debt	4,279	4,404
Current maturities of long-term debt	(878)	(780)	[1]
Long-term debt - net of current maturities	3,401	3,624	[1]
Real Estate Term Note [Member]
Long-term debt gross	4,004	4,253
Line of Credit [Member]
Long-term debt gross	437
First Unsecured Subordinated Promissory Notes Payable [Member]
Long-term debt gross		156
Second Unsecured Subordinated Promissory Notes Payable [Member]
Long-term debt gross		$ 203

[1] The balance sheet at December 31, 2018 has been derived from the audited financial statements at that date.