Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 127,603	$ 125,225
Short-term marketable securities	34,088	35,437
Accounts receivable, net of allowance for doubtful accounts of $1,781 and $952 as of December 31, 2020 and December 31, 2019, respectively	57,877	57,450
Inventory	10,862	10,075
Prepaid expenses and other current assets	11,032	8,232
Income taxes receivable	540	0
Total current assets	242,002	236,419
Property and equipment, net	282,666	263,712
Goodwill	128,752	128,752
Other intangible assets, net	14,350	17,369
Long-term marketable securities	59,357	12,960
Operating lease assets	9,855	11,425
Finance lease assets	2,396	0
Other long-term assets	4,826	3,030
Total assets	744,204	673,667
Current liabilities
Accounts payable	18,248	16,804
Accrued compensation	11,989	15,058
Accrued liabilities and other	16,193	11,057
Current operating lease liabilities	3,272	3,340
Current finance lease liabilities	552	0
Income taxes payable	0	1,322
Total current liabilities	50,254	47,581
Long-term operating lease liabilities	7,586	8,565
Long-term finance lease liabilities	1,919	0
Long-term deferred tax liabilities	33,854	26,283
Other long-term liabilities	6,235	5,448
Total liabilities	99,848	87,877
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of December 31, 2020 and December 31, 2019, respectively	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 26,776,796 and 26,786,459 shares as of December 31, 2020 and December 31, 2019, respectively	27	27
Additional paid-in capital	284,848	268,059
Retained earnings	362,901	324,722
Accumulated other comprehensive loss	(3,420)	(7,018)
Total shareholders' equity	644,356	585,790
Total liabilities and shareholders' equity	$ 744,204	$ 673,667