Note 14 - Discontinued Operations - Major Classes of Assets and Liabilities and the Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Current assets:
Accounts receivable, net	$ 14,375		$ 14,375		$ 10,961
Inventory, net	2,205		2,205		3,005
Prepaid expenses and other assets	378		378		315
Property and equipment, net	6,874		6,874
Goodwill	1,484		1,484
Other intangible assets, net	6,400		6,400
Other assets	183		183
Total major classes of current assets of the discontinued operations	31,899		31,899		14,281
Property and equipment, net					6,303
Other intangible assets, net					6,813
Other assets					185
Total major classes of noncurrent assets of the discontinued operations					14,785
Total assets of the disposal group classified as held for sale in the condensed consolidated balance sheets	31,899		31,899		29,066
Current liabilities:
Accounts payable	1,235		1,235		1,290
Accrued liabilities	3,006		3,006		3,326
Other liabilities	120		120		14
Total major classes of current liabilities of the discontinued operations	4,361		4,361		4,630
Total major classes of noncurrent liabilities of the discontinued operations	37		37		48
Total liabilities of the disposal group classified as held for sale in the condensed consolidated balance sheets	4,398		4,398		$ 4,678
Major classes of line items constituting loss from discontinued operations before income taxes:
Service revenue	18,446	$ 16,836	46,265	$ 42,825
Cost of service revenue	(9,889)	(9,340)	(30,359)	(28,219)
Gross profit	8,557	7,496	15,906	14,606
Research and development	(2,077)	(1,535)	(4,989)	(4,127)
Sales and marketing	(2,093)	(2,239)	(6,582)	(6,999)
General and administrative	(1,613)	(1,072)	(4,439)	(3,553)
Income (loss) from discontinued operations before income taxes	2,774	2,650	(104)	(73)
Income tax (expense) benefit
Income from discontinued operations	$ 2,774	$ 2,650	$ (104)	$ (73)