Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 177,993	$ 133,407
Short-term restricted cash		750
Accounts receivable, net	78,727	75,302
Inventories, net	129,000	120,544
Prepaid expenses and other current assets	11,051	9,772
Total current assets	396,771	339,775
Property, plant and equipment, net	41,149	36,168
Long-term restricted cash	6,909	6,723
Deferred income taxes	71,939	83,148
Other assets	31,673	22,404
Total assets	548,441	488,218
Current liabilities:
Accounts payable	35,955	32,642
Accrued compensation	19,218	20,955
Warranty	4,819	4,112
Income taxes	462	273
Deferred revenue	19,513	16,181
Other current liabilities	5,030	5,124
Total current liabilities	84,997	79,287
Sale leaseback obligation	47,757	47,714
Long-term deferred revenue	3,071	1,964
Other long-term liabilities	4,279	5,643
Total liabilities	140,104	134,608
Commitments and contingencies (Note 16)
Stockholders' equity:
Common stock, $0.001 par value, 75,000 shares authorized; 32,558 shares issued and outstanding at December 31, 2018; 32,048 shares issued and outstanding at December 31, 2017	33	32
Additional paid-in capital	565,116	556,147
Accumulated deficit	(157,260)	(204,745)
Accumulated other comprehensive income	448	2,176
Total stockholders' equity	408,337	353,610
Total liabilities and stockholders' equity	$ 548,441	$ 488,218