Note 13 - Segment Reporting - Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue	$ 22,335	$ 18,316
Income (loss) from operations	2,866	1,106
Depreciation expense	263	339
Interest expense, net	403	328
Total assets	9,110	6,727
Facilities Segment [Member]
Revenue	15,186	12,254
Facilities Segment [Member] | Operating Segments [Member]
Revenue	15,187	12,254
Income (loss) from operations	4,317	2,816
Depreciation expense	32	64
Interest expense, net	256	184
Total assets	1,063	2,682
System Integration Services Segment [Member] | Operating Segments [Member]
Revenue	7,148	6,062
Income (loss) from operations	(1,451)	(1,710)
Depreciation expense	231	306
Interest expense, net	147	144
Total assets	1,514	1,572
Other Segments [Member] | Operating Segments [Member]
Total assets	$ 6,533	$ 2,473