Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 47,802	$ 127,603
Short-term marketable securities	16,542	34,088
Accounts receivable, net of allowance for doubtful accounts of $1,993 and $1,781 as of September 30, 2021 and December 31, 2020, respectively	85,629	57,877
Inventory	9,813	10,862
Income taxes receivable	1,766	540
Prepaid expenses and other current assets	10,571	11,032
Total current assets	172,123	242,002
Property and equipment, net	283,019	282,666
Goodwill	404,240	128,752
Other intangible assets, net	39,816	14,350
Long-term marketable securities	19,557	59,357
Operating lease assets	5,197	9,855
Finance lease assets	2,022	2,396
Other long-term assets	4,337	4,826
Total assets	930,311	744,204
Current liabilities
Accounts payable	22,735	18,248
Accrued compensation	15,269	11,989
Accrued liabilities and other	12,636	16,193
Current contingent consideration	2,506	0
Current operating lease liabilities	2,362	3,272
Current finance lease liabilities	555	552
Total current liabilities	56,063	50,254
Long-term contingent consideration	2,294	0
Long-term operating lease liabilities	2,792	7,586
Long-term finance lease liabilities	1,498	1,919
Long-term deferred tax liabilities	36,331	33,854
Other long-term liabilities	6,712	6,235
Total liabilities	105,690	99,848
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of September 30, 2021 and December 31, 2020	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 27,603,649 and 26,776,796 shares as of September 30, 2021 and December 31, 2020, respectively	28	27
Additional paid-in capital	464,900	284,848
Retained earnings	373,151	362,901
Accumulated other comprehensive loss	(13,458)	(3,420)
Total shareholders' equity	824,621	644,356
Total liabilities and shareholders' equity	$ 930,311	$ 744,204