Note 11 - Segment Information - Segment Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 4,271	$ 4,781
Accounts receivable, net	2,177	1,809
Inventories, net	2,728	2,897
Property and equipment, net	132	112
Other assets	133	119
Total Assets	10,525	9,998
Restricted cash	100	100
Prepaid expenses and other current assets	250	180
Power Supplies [Member]
Cash and cash equivalents	285	381
Accounts receivable, net	948	1,048
Inventories, net	1,261	1,576
Property and equipment, net	12	47
Other assets	115	102
Total Assets	2,621	3,154
Data Storage [Member]
Cash and cash equivalents	3,986	4,400
Accounts receivable, net	1,229	761
Inventories, net	1,467	1,321
Property and equipment, net	120	65
Other assets	762	29
Total Assets	7,904	6,844
Restricted cash	100	100
Prepaid expenses and other current assets	$ 240	$ 168