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Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 98,003 $ 125,225
Short-term marketable securities 33,128 35,437
Accounts receivable, net of allowance for doubtful accounts of $1,836 and $952 as of June 30, 2020 and December 31, 2019, respectively 61,297 57,450
Inventory 10,774 10,075
Income taxes receivable 95 0
Prepaid expenses and other current assets 9,670 8,232
Total current assets 212,967 236,419
Property and equipment, net 281,129 263,712
Goodwill 128,752 128,752
Other intangible assets, net 15,861 17,369
Long-term marketable securities 44,127 12,960
Operating lease assets 11,049 11,425
Other long-term assets 4,560 3,030
Total assets 698,445 673,667
Current liabilities    
Accounts payable 17,556 16,804
Accrued compensation 15,138 15,058
Accrued liabilities and other 15,041 11,057
Current operating lease liabilities 3,368 3,340
Income taxes payable 0 1,322
Total current liabilities 51,103 47,581
Long-term operating lease liabilities 8,379 8,565
Long-term deferred tax liabilities 31,907 26,283
Other long-term liabilities 5,807 5,448
Total liabilities 97,196 87,877
Shareholders' equity    
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of June 30, 2020 and December 31, 2019 0 0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 26,706,556 and 26,786,459 shares as of June 30, 2020 and December 31, 2019, respectively 27 27
Additional paid-in capital 272,231 268,059
Retained earnings 338,625 324,722
Accumulated other comprehensive loss (9,634) (7,018)
Total shareholders' equity 601,249 585,790
Total liabilities and shareholders' equity $ 698,445 $ 673,667