Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Federal NOL carryforwards	$ 152,705	$ 153,139
State NOL carryforwards	9,003	9,016
Business interest expense limitation	1,877
Other	1,876	1,866
Gross deferred tax asset	166,545	164,021
Valuation allowance	(166,545)	(163,992)
Deferred tax asset		29
Deferred tax liabilities:
Other		29
Deferred tax liability		29
Net deferred tax asset
Healthcare Staffing [Member]
Deferred tax assets:
Goodwill impairment, HCS	$ 1,084