Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Year Ended December 31,
	201 9			201 8			201 7
U.S.	$	(13,037)		$	(14,177)		$	11,203
Foreign		774			662			757
Income (loss) before income taxes	$	(12,263	)	$	(13,515	)	$	11,960

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

	Year Ended December 31,
	201 9		201 8		201 7
Current:
Federal	$	-	$	(15)	$	148
State		101		123		71
Foreign		(76)		303		511
Total Current		25		411		730
Deferred:
Federal		2		15,674		(17,393)
State		1		1,230		(1,348)
Foreign		57		(60)		(22)
Total Deferred		60		16,844		(18,763)
Tax provision	$	85	$	17,255	$	(18,033)

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

	December 31,
	2019		2018
Net operating loss carryforwards	$	14,507	$	11,227
Stock-based compensation		1,111		1,040
Other accruals and reserves		2,202		1,924
Credits		11,888		10,857
Foreign		-		457
Accrued warranty		924		1,863
Depreciation and amortization		2,354		2,024
Other		897		282
Operating Lease Asset		3,949		-
Deferred tax asset before valuation allowance		37,831		29,674
Valuation allowance		(32,350)		(27,865)
Deferred tax asset after valuation allowance		5,482		1,809
Deferred tax liability on  Accrued commissions 606 cost		(1,076)		(1,269)
Deferred tax liability on goodwill		(97)		(83)
Operating Lease Liability		(3,885)		-
Net deferred tax asset	$	424	$	457

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

	Year Ended December 31,
	2019		2018		2017*
U.S. federal statutory income tax rate		21.00%		21.00%		34.00%
State tax rate		2.82		(4.95)		(5.59)
Meals and entertainment		(2.83)		(2.66)		2.15
Permanent differences		(2.58)		-		-
Stock-based compensation		3.78		13.66		(21.55)
SAB 118 Change in Estimate		-		(2.43)		-
Foreign rate differential		(0.34)		0.11		(0.50)
Other		(0.33)		(1.21)		0.65
General business credit		8.14		4.31		(2.72)
Change in Federal Tax Rate		-		-		60.98
Valuation allowance		(38.60)		(155.49)		(218.17)
Change in prior year reserves		2.53		-		-
Deferred true-up		5.71		-		-
Effective tax rate		(0.70)%		(127.66)%		(150.75)%

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

	Year Ended December 31,
	201 9		201 8			201 7
Balance at beginning of year	$	1,563	$	1,519		$	707
Decreases related to prior year tax positions		(291)		(70	)		643
Increases related to prior year tax positions		25		-			-
Increases related to current year tax positions		129		114			169
Balance at end of year	$	1,426	$	1,563		$	1,519