Note 8 - Segment Reporting - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Revenue	$ 4,849	$ 4,389
Operating Income:
Income (loss) from operations	185	300
Depreciation expense:
Depreciation expense	70	102
Interest expense
Interest expense, net	93	77
Facilities Segment [Member]
Revenues:
Revenue	3,379	2,488
Facilities Segment [Member] | Operating Segments [Member]
Revenues:
Revenue	3,379	2,488
Operating Income:
Income (loss) from operations	705	558
Depreciation expense:
Depreciation expense	8	9
Interest expense
Interest expense, net	59	43
System Integration Services Segment [Member] | Operating Segments [Member]
Revenues:
Revenue	1,470	1,901
Operating Income:
Income (loss) from operations	(520)	(258)
Depreciation expense:
Depreciation expense	62	93
Interest expense
Interest expense, net	$ 34	$ 34