Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 219,731	$ 203,479
Accounts receivable, net	79,544	86,865
Inventories, net	192,321	161,076
Prepaid expenses and other current assets	22,535	19,371
Total current assets	514,131	470,791
Property, plant and equipment, net	30,683	29,840
Operating lease assets	7,626	4,542
Finance lease assets, net	19,889	20,544
Long-term restricted cash	755	753
Deferred income taxes	51,386	57,851
Other assets	36,170	40,303
Total assets	660,640	624,624
Current liabilities:
Accounts payable	40,695	24,013
Accrued compensation	14,906	24,562
Warranty	4,690	4,280
Income taxes	622	654
Deferred revenue	34,112	21,221
Current portion of finance lease obligation	864	756
Other current liabilities	10,585	8,945
Total current liabilities	106,474	84,431
Long-term finance lease obligation	46,923	47,393
Long-term deferred revenue	1,406	1,837
Other long-term liabilities	11,735	9,361
Total liabilities	166,538	143,022
Commitments and contingencies (Note 16)
Stockholders? equity:
Common stock, $0.001 par value, 75,000 shares authorized; 33,679 shares issued and outstanding at June 30, 2021; 33,633 shares issued and outstanding at December 31, 2020	34	34
Additional paid-in capital	561,680	570,102
Accumulated deficit	(70,281)	(91,969)
Accumulated other comprehensive income	2,669	3,435
Total stockholders? equity	494,102	481,602
Total liabilities and stockholders? equity	$ 660,640	$ 624,624