Note J - Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Quoted prices		Significant
	in active		other
	markets for		observable		Significant
	identical		remaining		unobservable
	assets (Level 1)		inputs (Level 2)		inputs (Level 3)		Total
Assets:
Cash and cash equivalents	$	59,977	$	—	$	—	$	59,977
Restricted cash		7,051		—		—		7,051
Total assets	$	67,028	$	—	$	—	$	67,028
Liabilities:
Bank acceptance payable		—	$	6,310		—	$	6,310
Convertible senior notes		—		77,191		—		77,191
Total liabilities	$	—	$	83,501	$	—	$	83,501

	Quoted prices		Significant
	in active		other
	markets for		observable		Significant
	identical		remaining		unobservable
	assets (Level 1)		inputs (Level 2)		inputs (Level 3)		Total
Assets:
Cash and cash equivalents	$	55,646	$	—	$	—	$	55,646
Restricted cash		2,358		—		—		2,358
Total assets	$	58,004	$	—	$	—	$	58,004
Liabilities:
Bank acceptance payable		—	$	4,628		—	$	4,628
Total liabilities	$	—	$	4,628	$	—	$	4,628