CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 124,334	$ 67,770
Marketable securities	70,005	109,589
Accounts receivable, less allowance of $956 and $460	68,512	65,283
Inventories, net	91,391	67,521
Income taxes receivable	3,253	7,220
Prepaid expenses and other current assets	8,976	4,699
Total current assets	366,471	322,082
Property, plant and equipment, net	16,763	17,342
Goodwill	22,495	22,495
Identifiable intangible assets, net	7,786	8,632
Other assets	16,395	15,371
Total assets	429,910	385,922
Current liabilities:
Accounts payable and accrued liabilities	30,095	26,800
Deferred revenue	7,564	6,223
Other current liabilities	7,922	9,284
Total current liabilities	45,581	42,307
Other non-current liabilities	10,173	10,461
Total liabilities	55,754	52,768
Commitments and contingencies
Stockholders’ equity:
Common stock	32	32
Additional paid-in capital	390,547	386,196
Accumulated other comprehensive loss	(1,568)	(1,205)
Accumulated deficit	(14,855)	(51,869)
Total stockholders’ equity	374,156	333,154
Total liabilities and stockholders’ equity	$ 429,910	$ 385,922