Note 10 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

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

	As of June 30, 2021								As of December 31, 2020
	(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)		Total
Assets:
Cash and cash equivalents	$	44,013	$	—	$	—	$	44,013	$	43,425	$	—	$	—	$	43,425
Restricted cash		6,486		—		—	$	6,486		6,689		—		—	$	6,689
Note receivable		—		3,819		—		3,819		-		401		—		401
Total assets	$	50,499	$	3,819	$	—	$	54,318	$	50,114	$	401	$	—	$	50,515
Liabilities:
Bank acceptance payable	$	—	$	6,469	$	—	$	6,469	$	—	$	15,860	$	—		15,860
Convertible senior notes		—		70,265		—		70,265		—		70,225		—		70,225
Total liabilities	$	—	$	76,734	$	—	$	76,734	$	—	$	86,085	$	—	$	86,085