Note 4 - Balance Sheet Details (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 3 1 , 201 7		December 31, 2 01 6
Raw materials	$	11,543	$	10,966
Finished goods		4,129		4,011
Total	$	15,672	$	14,977

Schedule of Accrued Liabilities [Table Text Block]

	March 3 1 , 201 7		December 31, 201 6
Accrued payroll and related expenses	$	7,113	$	9,036
Warranty liability		2,735		2,461
Sales tax		1,644		2,373
Other		3,458		3,527
Total	$	14,950	$	17,397