Note 3 - Investments and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

(In thousands)
December 31, 2018	Level 1		Level 2		Level 3		Total
Money market securities	$	16	$	—	$	—	$	16
Certificate of deposit - restricted cash		523		—		—		523
Certificate of deposit - restricted investment (1)		400		—		—		400
Convertible notes receivable		—		—		655		655
Total assets	$	939	$	—	$	655	$	1,594

December 31, 2017	Level 1		Level 2		Level 3		Total
Money market securities	$	16	$	—	$	—	$	16
Total assets	$	16	$	—	$	—	$	16
Derivative instrument payable	$	—	$	356	$	—	$	356
Contingent consideration		—		—		45		45
Total liabilities	$	—	$	356	$	45	$	401

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

(In thousands)	Contingent			Convertible Notes
	Consideration			Receivable
Balance at December 31, 2017	$	45		$	—
Payments		(45	)		—
Investments		—			655
Fair value adjustments		—			—
Balance at December 31, 2018	$	—		$	655