Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 139,881	$ 177,993
Accounts receivable, net	83,753	78,727
Inventories, net	140,364	129,000
Prepaid expenses and other current assets	11,681	11,051
Total current assets	375,679	396,771
Property, plant and equipment, net	25,328	41,149
Operating lease assets	5,849
Finance lease assets, net	21,880
Long-term restricted cash	6,653	6,909
Deferred income taxes	68,060	71,939
Other assets	44,645	31,673
Total assets	548,094	548,441
Current liabilities:
Accounts payable	25,341	35,955
Accrued compensation	7,631	19,218
Warranty	2,759	4,819
Income taxes	294	462
Deferred revenue	24,601	19,513
Current portion of finance lease obligation	399
Other current liabilities	7,639	5,030
Total current liabilities	68,664	84,997
Finance lease obligation	48,149	47,757
Long-term deferred revenue	4,650	3,071
Other long-term liabilities	7,204	4,279
Total liabilities	128,667	140,104
Commitments and contingencies (Note 16)
Stockholders' equity:
Common stock, $0.001 par value, 75,000 shares authorized; 32,585 shares issued and outstanding at December 31, 2019; 32,558 shares issued and outstanding at December 31, 2018	33	33
Additional paid-in capital	559,878	565,116
Accumulated deficit	(140,226)	(157,260)
Accumulated other comprehensive (loss) income	(258)	448
Total stockholders' equity	419,427	408,337
Total liabilities and stockholders' equity	$ 548,094	$ 548,441