Note 9 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Federal NOL carryforwards	$ 153,320	$ 152,705
State NOL carryforwards	9,044	9,003
Business interest expense limitation	2,578	1,877
Other	1,812	1,876
Gross deferred tax asset	168,823	166,545
Valuation allowance	(168,823)	(166,545)
Deferred tax asset
Deferred tax liabilities:
Other
Deferred tax liability
Net deferred tax asset
Healthcare Staffing [Member]
Deferred tax assets:
Goodwill impairment, HCS	$ 2,069	$ 1,084

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