Note 11 - Reconciliation of Reportable Segment Operating Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Segments [Member]
Total segment operating income (loss)	$ (924)	$ (2,368)
Interest expense	107	83
Deferred loan fees amortization, net of loss on warrant liability	470	369
Total segment operating income (loss)	(1,560)	$ (3,204)
Severance charges	11
Depreciation and amortization expense	222	$ 291
Non-cash stock-based compensation expense	30	147
Non-recurring professional fees	74	413
Operating loss, including discontinued operations	(1,261)	(3,219)
Interest expense	107	83
Deferred loan fees amortization, net of loss on warrant liability	470	369
Loss before income taxes	$ (1,838)	$ (3,671)