Note 12 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

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

(in thousands)
June 30, 2019	Level 1		Level 2		Level 3		Total
Money market securities	$	17	$	—	$	—	$	17
Certificates of deposit - restricted cash		523		—		—		523
Certificate of deposit - restricted investment (1)		400		—		—		400
Equity method investment in VPS		—		—		5,552		5,552
Total assets	$	940	$	—	$	5,552	$	6,492

December 31, 2018	Level 1		Level 2		Level 3		Total
Money market securities	$	16	$	—	$	—	$	16
Certificates 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

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

Changes in Fair Value Measurements
Using Significant Unobservable Inputs (Level 3)
	Convertible			Equity Method
(in thousands)	Note			Investment in VPS
Balance at December 31, 2018	$	655		$	—
Conversion to common stock of VPS		(655	)		—
Purchase equity method investment in VPS		—			5,908
Loss from equity method investment in VPS		—			(356	)
Balance at June 30, 2019	$	—		$	5,552