Note O - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Years ended December 31,
	2022			2021			2020
Domestic	$	(45,404	)	$	(21,229	)		(20,288	)
Foreign		(20,992	)		(32,931	)		(30,936	)
Total loss before income taxes	$	(66,396	)	$	(54,160	)		(51,224	)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

Current:	2022		2021		2020
Federal	$	—	$	—	$	41
State		1		2		2
Foreign		—		—		—
Total	$	1	$	2	$	43
Deferred:
Federal	$	—	$	—	$	(172	)
State		—		—		—
Foreign		—		—		7,357
Total	$	—	$	—	$	7,185
Income tax (benefit) expense	$	1	$	2	$	7,228

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2022			2021
NOL carryforward	$	47,901		$	44,448
Inventory reserves		2,892			2,872
Unrealized gains and losses		363			69
Share-based compensation		914			645
Foreign tax credit		4,599			4,599
Research and development credits		10,505			9,879
Interest		3,966			2,840
ASC 842 Assets		1,602			1,740
Other		776			728
Deferred tax assets		73,518			67,820
Less valuation allowance		(69,680	)		(57,721	)
Deferred tax assets, net		3,838			10,099
Depreciation and amortization		(2,441	)		(8,600	)
ASC 842 Liabilities		(1,397	)		(1,499	)
Deferred tax liabilities		(3,838	)		(10,099	)
Deferred tax assets, net	$	—		$	—

Summary of Valuation Allowance [Table Text Block]

	2022			2021		2020
Beginning Balance, January 1	$	57,721		$	43,462	$	25,736
Change charged to expense/(income)		14,196			13,822		17,137
Change charged to currency translation adjustment		(2,237	)		437		589
Ending Balance, December 31	$	69,680		$	57,721	$	43,462

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2022			2021			2020
Expected taxes at statutory rate	$	(13,943	)	$	(11,374	)	$	(10,775	)
PPP loan forgiveness		—			(1,308	)		—
Non-deductible/non-taxable items		33			897			1,132
Foreign rate differences		552			107			1,153
Foreign permanent differences		(1,407	)		(1,320	)		(1,002	)
Changes in valuation allowance		14,196			13,822			17,137
Share-based compensation		879			468			426
Research and development credits		(626	)		(872	)		(744	)
Alternative Minimum Tax		—			—			(172	)
Foreign other		—			—			12
Other, net		317			(418	)		61
Tax (benefit) expense	$	1		$	2		$	7,228

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	2022		2021		2020
Unrecognized tax benefits — January 1	$	181	$	181	$	181
Gross increases — tax positions in prior period		—		—		—
Gross decreases — tax positions in prior period		—		—		—
Unrecognized tax benefits — December 31	$	181	$	181	$	181