Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 155,317	$ 177,993
Short-term restricted cash	149
Accounts receivable, net	49,046	78,727
Inventories, net	138,353	129,000
Prepaid expenses and other current assets	11,050	11,051
Total current assets	353,915	396,771
Property, plant and equipment, net	25,130	41,149
Operating lease assets	6,175
Finance lease assets, net	22,231
Long-term restricted cash	6,707	6,909
Deferred income taxes	71,121	71,939
Other assets	45,198	31,673
Total assets	530,477	548,441
Current liabilities:
Accounts payable	21,320	35,955
Accrued compensation	6,961	19,218
Warranty	3,251	4,819
Income taxes	269	462
Deferred revenue	23,300	19,513
Current portion of finance lease obligation	252
Other current liabilities	7,674	5,030
Total current liabilities	63,027	84,997
Finance lease obligation	48,297	47,757
Long-term deferred revenue	4,141	3,071
Other long-term liabilities	7,165	4,279
Total liabilities	122,630	140,104
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock, $0.001 par value, 75,000 shares authorized; 32,397 shares issued and outstanding at September 30, 2019; 32,558 shares issued and outstanding at December 31, 2018	32	33
Additional paid-in capital	559,063	565,116
Accumulated deficit	(149,938)	(157,260)
Accumulated other comprehensive (loss) income	(1,310)	448
Total stockholders' equity	407,847	408,337
Total liabilities and stockholders' equity	$ 530,477	$ 548,441