Note 10 - Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	As of September 30, 2020								As of December 31, 2019
	(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)		Total
Assets:
Cash and cash equivalents	$	46,772	$	—	$	—	$	46,772	$	59,977	$	—	$	—	$	59,977
Restricted cash		11,296		—		—		11,296		7,051		—		—		7,051
Total assets	$	58,068	$	—	$	—	$	58,068	$	67,028	$	—	$	—	$	67,028
Liabilities:
Bank acceptance payable	$	—	$	13,366	$	—	$	13,366	$	—	$	6,310	$	—		6,310
Convertible senior notes		—		74,240		—		74,240		—		77,191		—		77,191
Total liabilities	$	—	$	87,606	$	—	$	87,606	$	—	$	83,501	$	—	$	83,501